H3C S5510 Series Operating instructions

Operation Manual – Cluster Management

H3C S3610&S5510 Series Ethernet Switches Table of Contents

Table of Contents

Chapter 1 Cluster Management Configuration........................................................................... 1-1

1.1 Cluster Management Overview .........................................................................................1-1

1.1.1 Cluster Management Definition...............................................................................1-1

1.1.2 Roles in a Cluster....................................................................................................1-2

1.1.3 How a Cluster Works ..............................................................................................1-3

1.2 Cluster Configuration Task List..........................................................................................1-7

1.3 Configuring the Management Device ................................................................................1-9

1.3.1 Enabling NDP Globally and for Specific Ports........................................................1-9

1.3.2 Configuring NDP Parameters..................................................................................1-9

1.3.3 Enabling NTDP Globally and for Specific Ports....................................................1-10

1.3.4 Configuring NTDP Parameters .............................................................................1-11

1.3.5 Manually Collecting NTDP Information.................................................................1-11

1.3.6 Enabling the Cluster Function...............................................................................1-11

1.3.7 Establishing a Cluster ...........................................................................................1-12

1.3.8 Configuring Communication Between the Management Device and the Member

Devices Within a Cluster................................................................................................

1-14

1.3.9 Configuring Cluster Member Management...........................................................1-14

1.4 Configuring the Member Devices ....................................................................................1-15

1.4.1 Enabling NDP Globally and for Specific Ports......................................................1-15

1.4.2 Enabling NTDP Globally and for Specific Ports....................................................1-15

1.4.3 Manually Collecting NTDP Information.................................................................1-15

1.4.4 Enabling the Cluster Function...............................................................................1-16

1.4.5 Deleting a Member Device from a Cluster............................................................1-16

1.5 Configuring Access Between the Management Device and Its Member Devices ..........1-16

1.6 Adding a Candidate Device to a Cluster..........................................................................1-17

1.7 Configuring Advanced Cluster Functions ........................................................................1-18

1.7.1 Configuring Topology Management......................................................................1-18

1.7.2 Configuring Interaction for a Cluster ..................................................................... 1-19

1.8 Displaying and Maintaining Cluster Management...........................................................1-21

1.9 Cluster Management Configuration Examples................................................................1-22

1.9.1 Cluster Management Configuration Example One ...............................................1-22

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Chapter 1 Cluster Management Configuration

When configuring cluster management, go to these sections for information you are

interested in:

z Cluster Management Overview

z Cluster Configuration Task List

z Configuring the Management Device

z Configuring the Member Devices

z Configuring Access Between the Management Device and Its Member Devices

z Adding a Candidate Device to a Cluster

z Configuring Advanced Cluster Functions

z Displaying and Maintaining Cluster Management

z Cluster Management Configuration Examples

1.1 Cluster Management Overview

1.1.1 Cluster Management Definition

A cluster is an aggregation of a group of communication devices. Cluster management

is to implement management of large numbers of distributed network devices.

Cluster management is implemented through Huawei Group Management Protocol

version 2 (HGMPv2). By employing HGMPv2, a network administrator can manage

multiple devices using the public IP address of one device in a cluster. The device that

configured with a public address and performs the management function is known as

the management device and other managed devices are called member devices,

which together form a cluster.

Figure 1-1 illustrates a typical cluster implementation.

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Network

69.110.1.100

Network

management

device

69.110.1.1

Management

device

Member

device

Member

device

Member

device

Cluster

Candidate

device

Figure 1-1 Network diagram for a cluster

Cluster management offers the following advantages:

z Saving public IP address resource

z Simplifying configuration and management tasks. By configuring a public IP

address on the management device, you can configure and manage a group of

member devices on the management device without the trouble of logging onto

each device separately.

z Providing topology discovery and display function, which is useful for network

monitoring and debugging

z Allowing simultaneous software upgrading and parameter configuring on multiple

devices, free of topology and distance limitations

1.1.2 Roles in a Cluster

The devices in a cluster play different roles according to their different functions and

status. You can specify the role a device plays. The following three roles exist in a

cluster: management device, member device, and candidate device.

z Management device: The device providing management interfaces for all devices

in the cluster and the only device configured with a public IP address. Any

configuration, management, and monitoring of the member devices in a cluster

can only be implemented through the management device. When a device is

specified as the management device, it collects Neighbor Discovery Protocol

(NDP) and Neighbor Topology Discovery Protocol (NTDP) information to discover

and define a candidate device.

z Member device: The device being managed by the management device in a

cluster.

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z Candidate device: A device that does not belong to any cluster but can be added

to a cluster. Different from a member device, its topology information has been

collected by the management device but it has not been added to the cluster.

Figure 1-2 Role change in a cluster

A device in a cluster changes its role according to the following rules:

z A candidate device becomes a management device when you create a cluster on

it. Note that a cluster must have one (and only one) management device. On

becoming a management device, the device collects network topology information

and tries to discover and determine candidate devices, which can then be added

to the cluster through configuration.

z A candidate device becomes a member device after being added to a cluster.

z A member device becomes a candidate device after it is removed from the cluster.

z A management device becomes a candidate device only after the cluster is

removed.

1.1.3 How a Cluster Works

HGMPv2 consists of the following three protocols:

z Neighbor Discovery Protocol (NDP)

z Neighbor Topology Discovery Protocol (NTDP)

z Cluster

A cluster configures and manages the devices in it through the above three protocols.

Cluster management involves topology information collection and the establishment

and maintenance of a cluster. Topology information collection and cluster maintenance

are independent from each other, with the former starting before the cluster is created:

z All devices use NDP to collect the information of the directly connected neighbors,

including their software version, host name, MAC address and port number.

z The management device uses NTDP to collect the information of the devices

within user-specified hops and the topology information of all devices and specify

the candidate devices of the cluster.

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z The management device adds or deletes a member device and modifies cluster

management configuration according to the candidate device information

collected through NTDP.

I. Introduction to NDP

NDP is used to discover the information about directly connected neighbors, including

the device name, software version, and connecting port of the adjacent devices. NDP

works in the following ways:

z A device running NDP periodically sends NDP packets to its neighbors. An NDP

packet carries NDP information (including the device name, software version, and

connecting port, etc.) and the holdtime, which indicates how long the receiving

devices will keep the NDP information. At the same time, the device also receives

but does not forward the NDP packets from its neighbors.

z A device running NDP stores and maintains an NDP table. The device creates an

entry in the NDP table for each neighbor. If a new neighbor is found, meaning the

device receives an NDP packet sent by the neighbor for the first time, the device

adds an entry in the NDP table. When another NDP packet is received, if the NDP

information carried in the NDP packet is different from the stored information, the

corresponding entry in the NDP table is updated; otherwise, only the holdtime of

the entry is updated. If no NDP information from the neighbor is received within the

holdtime, the corresponding entry is removed from the NDP table.

NDP runs on the data link layer, and therefore supports different network layer

protocols.

II. Introduction to NTDP

NTDP is a protocol used to collect network topology information. NTDP provides

information required for cluster management: it collects topology information about the

devices within the specified hop count, to identify candidate devices for a cluster.

Based on the neighbor information stored in the neighbor table maintained by NDP,

NTDP on the management device advertises NTDP topology collection requests to

collect the NDP information of each device in a specific network range as well as the

connection information of all its neighbors. The information collected will be used by the

management device or the network management software to implement required

functions.

When a member device detects a change on its neighbors through its NDP table, it

informs the management device through handshake packets. Then the management

device triggers its NTDP to perform specific topology collection, so that its NTDP can

discover topology changes timely.

The management device collects topology information periodically. You can also

administratively launch a topology information collection with commands. The process

of topology information collection is as follows:

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z The management device periodically sends NTDP topology collection request

from the NTDP-enabled ports.

z Upon receiving the request, the device sends NTDP topology collection response

to the management device, copies this response packet on the NTDP-enabled

port and sends it to the adjacent device. Topology collection response includes the

basic information of the NDP-enabled device and NDP information of all adjacent

devices.

z The adjacent device performs the same operation until the NTDP topology

collection request is sent to all the devices within specified hops.

When the NTDP topology collection request is advertised in the network, large

numbers of network devices receive the NTDP topology collection request and send

NTDP topology collection response at the same time, which may cause congestion and

the management device busyness. To avoid such case, the following methods can be

used to control the speed of the NTDP topology collection request advertisement:

z Upon receiving an NTDP topology collection request the device does not forward it,

instead, it waits for a period of time and then forwards the NTDP topology

collection request on the first NTDP-enabled port.

z On the same device, except the first port, each NTDP-enabled port waits for a

period of time and then forwards the NTDP topology collection request after the

port before it sends the NTDP topology collection request.

III. Cluster management maintenance

1) Adding a candidate device to a cluster

You should specify the management device before creating a cluster. The

management device discovers and defines a candidate device through NDP and NTDP

protocols. The candidate device can be automatically or manually added to the cluster.

After the candidate device is added to the cluster, it can obtain the member number

assigned by the management device and the private IP address used for cluster

management.

2) Communication within a cluster

In a cluster the management device communicates with its member devices by sending

handshake packets to maintain connection between them. The management/member

device state change is shown in

Figure 1-3.

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Receives the

handshake or

management

packets

Fails to receive

handshake

packets in three

consecutive

intervals

State holdtime exceeds

the specified value

Disconnect state

is recovered

Active

Connect

Disconnect

Figure 1-3 Management/member device state change

z After a cluster is created and a candidate device is added to the cluster and

becomes a member device, the management device saves the state information

of its member device and identifies it as Active. And the member device also saves

its state information and identifies it as Active.

z After a cluster is created, its member devices begin to send handshake packets

first. The management device also sends handshake packets to the member

devices at the same interval. Upon receiving the handshake packets from the

other side, the management device or member device simply changes or remains

its state as Active, without sending a response.

z If the management device does not receive the handshake packets from a

member device in an interval three times of the interval to send handshake

packets, it changes the status of the member device from Active to Connect.

Likewise, if a member device fails to receive the handshake packets from the

management device in an interval three times of the interval to send handshake

packets, the status of the member device will also be changed from Active to

Connect.

z If this management device, in information holdtime, receives the handshake or

management packets from its member device which is in Connect state, it

changes the state of its member device to Active; otherwise, it changes the state

of its member device to Disconnect, in which case the management device

considers its member device disconnected. If this member device, which is in

Connect state, receives handshake or management packets from the

management device in information holdtime, it changes its state to Active;

otherwise, it changes its state to Disconnect.

z If the communication between the management device and a member device is

recovered, the member device which is in Disconnect state will be added to the

cluster. After that, the state of the member device locally and on the management

device will be changed to Active.

Besides, the member device informs the management device using handshake

packets when there is a neighbor topology change.

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IV. Management VLAN

The management VLAN limits the cluster management range. Through configuration of

the management VLAN, the following functions can be implemented:

z Management packets (including NDP, NTDP and handshake packets) are

restricted within the management VLAN, therefore isolated from other packets,

which enhances security.

z The management device and the member devices communicate with each other

through the management VLAN.

For a cluster to work normally, you must set the packets from the management VLAN

to pass the subtending ports (If a candidate device is connected to the management

device through another candidate device, the ports connecting these two candidate

devices are called subtending ports.) and the ports connecting the management device

and the member/candidate devices. Therefore:

z If the packets from the management VLAN cannot pass a port, the device

connected with the port cannot be added to the cluster. Therefore, if the ports

(including the subtending ports) connecting the management device and the

member/candidate devices prohibit the packets from the management VLAN, you

can set the packets from the management VLAN to pass the ports on candidate

devices with the management VLAN auto-negotiation function.

z Only when the default VLAN ID of the subtending ports and the ports connecting

the management device and the member/candidate devices is that of the

management VLAN can you set the packets without tags from the management

VLAN to pass the ports; otherwise, only the packets with tags from the

management VLAN can pass the ports.

Refer to the VLAN part of the manual.

1.2 Cluster Configuration Task List

Before configuring a cluster, you need to determine the roles and functions the devices

play. You also need to configure the related functions, preparing for the communication

between devices within the cluster.

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Complete these tasks to configure a cluster:

Tasks Remarks

Enabling NDP Globally and for Specific Ports Optional

Configuring NDP Parameters Optional

Enabling NTDP Globally and for Specific Ports Optional

Configuring NTDP Parameters Optional

Manually Collecting NTDP Information Optional

Enabling the Cluster Function Optional

Establishing a Cluster Required

Configuring Communication Between the

Management Device and the Member Devices

Within a Cluster

Optional

Configuring the

Management

Device

Configuring Cluster Member Management Optional

Enabling NDP Globally and for Specific Ports Optional

Enabling NTDP Globally and for Specific Ports Optional

Manually Collecting NTDP Information Optional

Enabling the Cluster Function Optional

Configuring the

Member Devices

Deleting a Member Device from a Cluster Optional

Configuring Access Between the Management Device and Its

Member Devices

Optional

Adding a Candidate Device to a Cluster Optional

Configuring Topology Management Optional Configuring

Advanced

Cluster

Functions

Configuring Interaction for a Cluster Optional

Caution:

Disabling the NDP and NTDP functions on the management device and member

devices after a cluster is created will not cause the cluster to be dismissed, but will

influence the normal operation of the cluster.

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1.3 Configuring the Management Device

1.3.1 Enabling NDP Globally and for Specific Ports

Follow these steps to enable NDP globally and for specific ports:

To do… Use the command… Remarks

Enter system view

system-view

—

Enable NDP globally

ndp enable

Optional

Enabled by default.

In system

view

ndp enable

interfaceinterface-list

interface interface-type

interface-number

Enable the

NDP

feature for

the port(s)

Ethernet

port view

ndp enable

Use either command

By default, NDP is

enabled globally and

also on all ports.

Caution:

z For NDP to work normally, you must enable NDP both globally and on the specified

port.

z If the subtending port or the port connecting the management device to a

member/candidate device is a port of a member in an aggregation group, you must

enable NDP on all member ports of the aggregation group at the same time.

Otherwise, NDP will work abnormally.

z You are recommended to disable NDP on the port which connects with the devices

that do not need to join the cluster, preventing the management device from adding

the device which needs not to join the cluster and collecting the topology information

of this device.

1.3.2 Configuring NDP Parameters

Follow these steps to configure NDP parameters:

To do… Use the command… Remarks

Enter system view

system-view

—

Configure the period for

the receiving devices to

keep the NDP packets

ndp timer aging

aging-time

Optional

180 seconds by default.

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To do… Use the command… Remarks

Configure the interval to

send NDP packets

ndp timer hello

hello-time

Optional

60 seconds by default.

Caution:

The time for the receiving device to hold NDP packets cannot be shorter than the

interval to send NDP packets; otherwise, the NDP table may become instable.

1.3.3 Enabling NTDP Globally and for Specific Ports

Follow these steps to enable NTDP globally and for specific ports:

To do… Use the command… Remarks

Enter system view

system-view

—

Enable NTDP globally

ntdp enable

Optional

Enabled by default

interface interface-type

interface-number

Enable NTDP for the port

ntdp enable

Optional

NTDP is enabled on all

ports by default.

Caution:

z For NTDP to work normally, you must enable NTDP both globally and on the

specified port.

z The NTDP function is mutually exclusive with the BPDU TUNNEL function under a

port and you cannot enable them at the same time. For the detailed description of

the BPDU TUNNEL function, refer to BPDU TUNNEL part of the manual.

z If the subtending port or the port connecting the management device to a

member/candidate device is a port of a member in an aggregation group, you must

enable NDP on all member ports of the aggregation group at the same time.

Otherwise, NDP will work abnormally.

z You are recommended to disable NDP on the port which connects with the devices

that do not need to join the cluster, preventing the management device from adding

the device which needs not to join the cluster and collecting the topology information

of this device.

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1.3.4 Configuring NTDP Parameters

Follow these steps to configure NTDP parameters:

To do… Use the command… Remarks

Enter system view

system-view

—

Configure the range within

which topology information is

to be collected

ntdp hop hop-value

Optional

By default, the hop

range for topology

collection is 3 hops.

Configure the interval to

collect topology information

ntdp timer interval-time

Optional

1 minute by default.

Configure the delay to forward

topology-collection request

packets on the first port

ntdp timer hop-delay

time

Optional

200 ms by default.

Configure the port delay to

forward topology collection

request

ntdp timer port-delay

time

Optional

20 ms by default.

1.3.5 Manually Collecting NTDP Information

The management device collects topology information periodically after a cluster is

created. In addition, you can configure to manually collect NTDP information to initiate

NTDP information collection, thus managing and monitoring the device on real time,

regardless of whether a cluster is created.

Follow these steps to configure to manually collect NTDP information:

To do… Use the command… Remarks

Manually collect NTDP

information

ntdp explore

Required

1.3.6 Enabling the Cluster Function

To do… Use the command… Remarks

Enter system view

system-view

—

Enable the cluster

function globally

cluster enable

Optional

Enabled by default.

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1.3.7 Establishing a Cluster

Before establishing a cluster, you need to configure a private IP address pool for the

devices to be added to the cluster. When a candidate device is added to a cluster, the

management device assigns a private IP address to it for the candidate device to

communicate with other devices in the cluster. This enables you to manage and

maintain member devices in a cluster through the management device.

Caution:

z If the routing table of the management device is full when a cluster is created, that is,

entries with the destination address as a candidate device cannot be added to the

routing table, all candidate devices will be added to and removed from the cluster

repeatedly.

z If the routing table of a candidate device is full when the candidate device is added

to the cluster, that is, entries with the destination address as the management

device cannot be added to the routing table, the candidate device will be added to

and removed from the cluster repeatedly.

Caution:

z You can only specify a management VLAN before establishing a cluster. After a

device has been added to the cluster, you cannot modify the management VLAN.

To change the management VLAN after the cluster is established, you should

remove the cluster on the management device, re-specify the management VLAN

and reestablish a cluster.

z For the purpose of security, you are not recommended to configure the VLAN ID of

the management VLAN as the default VLAN ID of the port connecting the

management device to its member devices.

z Only when the default VLAN ID of all subtending ports and the port connecting the

management device to its member device is that of the management VLAN, can the

packets without a tag from the management VLAN pass the ports. Otherwise, you

must configure the packets from the management VLAN to pass these ports. For

the configuration procedure, refer to the VLAN part of the manual.

z You must configure the IP address pool before establishing a cluster and configure

it on the management device only. If a cluster has already been established, you are

not allowed to change the IP address pool.

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I. Manually establishing a cluster

Follow these steps to manually establish a cluster:

To do… Use the command… Remarks

Enter system view

system-view

—

Specify the management

VLAN

management-vlan

vlan-id

Optional

By default, VLAN 1 is the

management VLAN.

Enter cluster view

cluster

—

Configure the private IP

address range for

member devices on a

device which is to be

configured as the

management device

ip-pool

administrator-ip-address

{ mask | mask-length }

Required

For a cluster to work

normally, the IP

addresses of the VLAN

interfaces of the

management device and

member devices must not

be in the same network

segment as that of the

cluster address pool.

Configure the current

device as the

management device and

assign a name to it

build name

Required

By default, the device is

not the management

device.

II. Automatically establishing a cluster

In addition to establishing a cluster manually, you are also provided with the means to

establish a cluster automatically. With only a few commands (as shown in the table

below) on the management device, you can let the system automatically build a cluster.

During the process, you will first be asked to enter a name for the cluster you want to

establish, the system then lists all the candidate devices within your predefined hop

counts and starts to automatically add them to the cluster.

You can use <Ctrl+C> anytime during the adding process to exit cluster auto-building.

However, this will only stop adding new devices into the cluster, and devices already

added in the cluster are not removed.

Follow these steps to automatically establish a cluster:

To do… Use the command… Remarks

Enter system view

system-view

—

Specify the management

VLAN

management-vlan

vlan-id

Optional

By default, VLAN 1 is the

management VLAN.

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To do… Use the command… Remarks

Enter cluster view

cluster

—

Configure the private IP

address range for

member devices on a

device which is to be

configured as the

management device

ip-pool

administrator-ip-address

{ mask | mask-length }

Required

For a cluster to work

normally, the IP

addresses of the VLAN

interfaces of the

management device and

member devices must not

be in the same network

segment as the cluster

address pool.

Establish a cluster

automatically

auto-build [ recover ] Required

1.3.8 Configuring Communication Between the Management Device and the

Member Devices Within a Cluster

In a cluster, the management device and member devices communicate by sending

handshake packets to maintain connection between them. You can configure interval of

sending handshake packets and the holdtime of a device on the management device.

This configuration applies to all member devices within the cluster.

Follow these steps to configure communication between the management device and

the member devices within a cluster:

To do… Use the command… Remarks

Enter system view

system-view

—

Configure the interval to

send handshake packets

timer interval-time

Optional

10 seconds by default

Configure the holdtime of

a device

holdtime seconds

Optional

60 seconds by default

1.3.9 Configuring Cluster Member Management

I. Adding/Removing a member device

You can manually add a candidate device to a cluster, or remove a member device from

a cluster. These operations must be done through the management device, otherwise

you will be prompted with an error message.

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Follow these steps to add/remove a member device:

To do… Use the command… Remarks

Enter system view

system-view

—

Enter cluster view

cluster

—

Add a candidate device to

the cluster

add-member [ member-number ]

mac-address mac-address

[ password password ]

Optional

Remove a member device

from the cluster

delete-member member-number

[ to-black-list ]

Required

II. Rebooting a member device

Communication between the management and member devices may be interrupted

due to some configuration errors. Through the remote control function of member

devices, you can control them remotely on the management device. For example, you

can reboot a member device that operates improperly and specify to delete the booting

configuration file when the member device reboots, and thus achieve normal

communication between the management and member devices.

Follow these steps to reboot a member device:

To do… Use the command… Remarks

Enter system view

system-view

—

Enter cluster view

cluster

—

Reboot a specified

member device

reboot member { member-number |

mac-address mac-address }

[ eraseflash ]

Required

1.4 Configuring the Member Devices

1.4.1 Enabling NDP Globally and for Specific Ports

Refer to Enabling NDP Globally and for Specific Ports.

1.4.2 Enabling NTDP Globally and for Specific Ports

Refer to Enabling NTDP Globally and for Specific Ports.

1.4.3 Manually Collecting NTDP Information

Refer to Manually Collecting NTDP Information.

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1.4.4 Enabling the Cluster Function

Refer to Enabling the Cluster Function.

1.4.5 Deleting a Member Device from a Cluster

To do… Use the command… Remarks

Enter system view

system-view

—

Enter cluster view

cluster

—

Delete a member device

from the cluster

undo administrator-address

Required

1.5 Configuring Access Between the Management Device

and Its Member Devices

After having successfully configured NDP, NTDP and cluster, you can configure,

manage and monitor the member devices through the management device. You can

manage member devices in a cluster through switching from the operation interface of

the management device to that of a member device or configure the management

device by switching from the operation interface of a member device to that of the

management device.

Follow these steps to configure access between member devices of a cluster:

To do… Use the command… Remarks

Switch from the operation device

of the management device to

that of a member device

cluster switch-to

{ member-number |

mac-address mac-address |

sysname member-sysname }

Required

Switch from the operation

interface of a member device to

that of the management device

cluster switch-to

administrator

Required

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Caution:

Telnet connection is used on the switch between the management device and member

devices. Note the following when switching between them:

z Before the switch, execute the telnet server enable command to enable Telnet.

Otherwise, the switch fails.

z Authentication is required when you switch a member device to the management

device. The switch fails if authentication is not passed. Your user level is allocated

according to the predefined level by the management device if authentication is

passed.

z When a candidate device is added to a cluster and becomes a member device, its

super password will be automatically synchronized to the management device.

Therefore, after a cluster is established, you are not recommended to modify the

super password of the member device (including management device and member

devices) of the cluster; otherwise, the switch may fail because of authentication

failure.

z When you switch the management device to a member device, if member n does

not exist, the system prompts error; if the switch succeeds, your user level on the

management device is retained.

z If the Telnet users on the device to be logged in reach the maximum number, the

switch fails.

z To prevent resource waste, avoid recycling switch when configuring access

between cluster members. For example, if you switch from the operation interface of

the management device to that of a member device and then need to switch back to

that of the management device, use the quit command to end the switch, but not

the cluster switch-to administrator command to switch to the operation interface

of the management device.

1.6 Adding a Candidate Device to a Cluster

Follow these steps to add a candidate device to a cluster:

To do… Use the command… Remarks

Enter system view

system-view

—

Enter cluster view

cluster

—

Add a candidate device to

the cluster

administrator-address

mac-address name name

Required

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1-18

1.7 Configuring Advanced Cluster Functions

This section covers these topics:

z Configuring Topology Management

z Configuring Interaction for a Cluster

1.7.1 Configuring Topology Management

The concepts of blacklist and whitelist are used for topology management. An

administrator can diagnose the network by comparing the current topology and the

standard topology.

z Current topology: The information of a node and its neighbors of the cluster.

z Topology management whitelist (standard topology): A whitelist is a list of

topology information that has been confirmed by the administrator as correct. You

can get the information of a node and its neighbors from the current topology.

Based on the information, you can manage and maintain the whitelist by adding,

deleting or modifying a node.

z Topology management blacklist: A blacklist is a list of devices that are not allowed

to join a cluster unless the administrator manually removes them from the list. A

blacklist contains the MAC addresses of devices. If a blacklist device is connected

to network through another device not included in the blacklist, the MAC address

and access port of the latter are also included in the blacklist.

A whitelist member cannot be a blacklist member, and vice versa. However, a topology

node can belong to neither the whitelist nor the blacklist. Nodes of this type are usually

newly added nodes, whose identities are to be confirmed by the administrator.

You can back up the whitelist and blacklist to prevent them from missing when a power

failure occurs to the management device. The following two backup and restore

mechanisms are available:

z Backing them up on the FTP server shared by the cluster. You can manually

restore the whitelist and blacklist from the FTP server.

z Backing them up in the Flash of the management device. When the management

device restarts, the whitelist and blacklist will be automatically restored from the

Flash. When a cluster is reestablished, you can choose whether to restore the

whitelist and blacklist from the Flash automatically, or you can manually restore

them from the Flash of the management device.

Follow these steps to configure cluster topology management:

To do… Use the command… Remarks

Enter system view

system-view

—

Enter cluster view

cluster

—

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1-19

To do… Use the command… Remarks

Add a device to the

blacklist

black-list add-mac

mac-address

Optional

Remove a device from the

blacklist

black-list delete-mac

{ all | mac-address }

Optional

Confirm the current

topology and save it as

the standard topology

topology accept { all

[ save-to { ftp-server |

local-flash } ] |

mac-address

mac-address |

member-id

member-number }

Optional

Save the standard

topology to the FTP

server or the local Flash

topology save-to

{ ftp-server | local-flash }

Optional

Restore the standard

topology information from

the FTP server or the local

Flash

topology restore-from

{ ftp-server | local-flash }

Optional

You must ensure that the

topology is correct before

restoring it as the device

itself cannot judge the

correctness in topology.

1.7.2 Configuring Interaction for a Cluster

After establishing a cluster, you can configure FTP/TFTP server, NM host and log host

for the cluster on the management device.

z After you configure an FTP/TFTP server for a cluster, the members in the cluster

access the FTP/TFTP server configured through the management device.

z After you configure a log host for a cluster, all the log information of the members

in the cluster will be output to the configured log host in the following way: first, the

member devices send their log information to the management device, which then

converts the addresses of log information and sends them to the log host.

z After you configure an NM host for a cluster, the member devices in the cluster

send their Trap messages to the shared SNMP NM host through the management

device.

If the port of an access NM device (including FTP/TFTP server, NM host and log host)

does not allow the packets from the management VLAN to pass, the NM device cannot

manage the devices in a cluster through the management device. In this case, on the

management device, you need to configure the VLAN interface of the access NM

device (including FTP/TFTP server, NM host and log host) as the NM interface.

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H3C S5510 Series, S3610 Series Operating instructions

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