H3C S9500 Series Command Manual

Command Manual – BGP

H3C S9500 Series Routing Switches Table of Contents

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Table of Contents

Chapter 1 BGP Configuration Commands..................................................................................1-1

1.1 BGP Configuration Commands .........................................................................................1-1

1.1.1 aggregate................................................................................................................1-1

1.1.2 balance (BGP/BGP-VPN instance view).................................................................1-3

1.1.3 bestroute as-path-neglect (BGP/BGP-VPN instance view)....................................1-4

1.1.4 bestroute compare-med (BGP/BGP-VPN instance view).......................................1-4

1.1.5 bestroute med-confederation (BGP/BGP-VPN instance view)...............................1-5

1.1.6 bgp ..........................................................................................................................1-6

1.1.7 compare-different-as-med (BGP/BGP-VPN instance view)....................................1-7

1.1.8 confederation id.......................................................................................................1-8

1.1.9 confederation nonstandard .....................................................................................1-9

1.1.10 confederation peer-as.........................................................................................1-10

1.1.11 dampening (BGP/BGP-VPN instance view) .......................................................1-11

1.1.12 debugging bgp.....................................................................................................1-12

1.1.13 default ipv4-unicast.............................................................................................1-14

1.1.14 default local-preference (BGP/BGP-VPN instance view) ...................................1-15

1.1.15 default med (BGP/BGP-VPN instance view) ......................................................1-15

1.1.16 default-route imported (BGP/BGP-VPN instance view)......................................1-16

1.1.17 display bgp group................................................................................................1-17

1.1.18 display bgp network ............................................................................................1-19

1.1.19 display bgp paths................................................................................................1-20

1.1.20 display bgp peer..................................................................................................1-21

1.1.21 display bgp routing-table.....................................................................................1-23

1.1.22 display bgp routing-table as-path-acl..................................................................1-25

1.1.23 display bgp routing-table cidr..............................................................................1-26

1.1.24 display bgp routing-table community ..................................................................1-27

1.1.25 display bgp routing-table community-list.............................................................1-28

1.1.26 display bgp routing-table dampened...................................................................1-28

1.1.27 display bgp routing-table dampening parameter.................................................1-29

1.1.28 display bgp routing-table different-origin-as........................................................1-30

1.1.29 display bgp routing-table flap-info.......................................................................1-31

1.1.30 display bgp routing-table peer.............................................................................1-32

1.1.31 display bgp routing-table regular-expression......................................................1-33

1.1.32 display bgp routing-table statistic........................................................................ 1-34

1.1.33 ebgp-interface-sensitive......................................................................................1-35

1.1.34 filter-policy export (BGP/BGP-VPN instance view)............................................. 1-36

1.1.35 filter-policy import (BGP/BGP-VPN instance view).............................................1-37

1.1.36 group (BGP/BGP-VPN instance view)................................................................1-38

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1.1.37 import-route (BGP/BGP-VPN instance view)......................................................1-39

1.1.38 log-peer-change..................................................................................................1-40

1.1.39 network (BGP/BGP-VPN instance view).............................................................1-41

1.1.40 peer advertise-community (BGP/BGP-VPN instance view)................................1-42

1.1.41 peer advertise-ext-community (BGP/BGP-VPN instance view)..........................1-43

1.1.42 peer allow-as-loop (BGP/BGP-VPN instance view)............................................ 1-44

1.1.43 peer as-number (BGP/BGP-VPN instance view)................................................1-45

1.1.44 peer as-path-acl (BGP/BGP-VPN instance view)...............................................1-46

1.1.45 peer capability-advertise conventional................................................................1-47

1.1.46 peer capability-advertise route-refresh ...............................................................1-47

1.1.47 peer connect-interface (BGP/BGP-VPN instance view).....................................1-48

1.1.48 peer default-route-advertise (BGP/BGP-VPN instance view)............................. 1-49

1.1.49 peer description (BGP/BGP-VPN instance view)................................................1-50

1.1.50 peer ebgp-max-hop (BGP/BGP-VPN instance view)..........................................1-51

1.1.51 peer enable (BGP view)......................................................................................1-52

1.1.52 peer fake-as (BGP/BGP-VPN instance view).....................................................1-53

1.1.53 peer filter-policy (BGP/BGP-VPN instance view)................................................1-54

1.1.54 peer group (BGP/BGP-VPN instance view)........................................................1-55

1.1.55 peer ignore (BGP/BGP-VPN instance view).......................................................1-56

1.1.56 peer ip-prefix .......................................................................................................1-57

1.1.57 peer keep-all-routes (BGP/BGP-VPN instance view).........................................1-58

1.1.58 peer log-change (BGP/BGP-VPN instance view)...............................................1-59

1.1.59 peer next-hop-local (BGP/BGP-VPN instance view) ..........................................1-60

1.1.60 peer password.....................................................................................................1-61

1.1.61 peer preferred-value (BGP/BGP-VPN instance view).........................................1-62

1.1.62 peer public-as-only (BGP/BGP-VPN instance view)...........................................1-63

1.1.63 peer reflect-client (BGP view) .............................................................................1-64

1.1.64 peer route-limit (BGP/BGP-VPN instance view).................................................1-65

1.1.65 peer route-policy (BGP/BGP-VPN instance view) ..............................................1-66

1.1.66 peer route-update-interval (BGP/BGP-VPN instance view)................................1-67

1.1.67 peer substitute-as (BGP/BGP-VPN instance view).............................................1-68

1.1.68 peer timer (BGP/BGP-VPN instance view).........................................................1-69

1.1.69 preference (BGP/BGP-VPN instance view)........................................................1-70

1.1.70 reflect between-clients (BGP view).....................................................................1-71

1.1.71 reflector cluster-id (BGP view) ............................................................................1-71

1.1.72 refresh bgp..........................................................................................................1-72

1.1.73 reset bgp .............................................................................................................1-73

1.1.74 reset bgp dampening ..........................................................................................1-74

1.1.75 reset bgp flap-info ...............................................................................................1-74

1.1.76 reset bgp ipv4 all.................................................................................................1-75

1.1.77 router-id...............................................................................................................1-76

1.1.78 summary automatic.............................................................................................1-77

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1.1.79 synchronization (BGP view)................................................................................1-78

1.1.80 timer (BGP/BGP-VPN instance view).................................................................1-78

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Chapter 1 BGP Configuration Commands

1.1 BGP Configuration Commands

 Note:

For routing policy configuration commands, refer to Routing Policy Commands.

1.1.1 aggregate

Syntax

aggregate ip-address { mask | mask-length } [ as-set | attribute-policy

route-policy-name | detail-suppressed | origin-policy route-policy-name |

suppress-policy route-policy-name ] *

undo aggregate ip-address { mask | mask-length }

View

BGP view, BGP-VPN instance view

Default Level

2: System level

Parameters

ip-address: Summary address.

mask: Summary address mask, in dotted decimal notation.

mask-length: Summary address mask length.

as-set: Creates a summary with AS set.

attribute-policy route-policy-name: References a routing policy to set the attributes of

the summary route. Note that, when the routing policy is used, the apply as-path

clause of the routing policy cannot set the AS_PATH attribute of the summary route.

detail-suppressed: Only advertises the summary route.

suppress-policy route-policy-name: Suppresses specific routes defined in the routing

policy.

origin-policy route-policy-name: References the routing policy to specify routes for

summarization.

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Table 1-1 describes the functions of the above-mentioned keywords.

Table 1-1 Functions of the keywords

Keywords Function

as-set

Used to create a summary route, whose AS path contains

the AS path information of summarized routes. Use this

keyword carefully when many AS paths need to be

summarized, because the frequent changes of routes may

lead to route oscillation.

detail-suppressed

This keyword does not suppress the summary route, but it

suppresses the advertisement of all the more specific routes.

To summarize only some specific routes, use the peer

filter-policy command.

suppress-policy

Used to create a summary route and suppress the

advertisement of some summarized routes. If you want to

suppress some routes selectively and leave other routes still

advertised, use the if-match clause of the route-policy

command.

origin-policy

Selects only routes satisfying the routing policy for route

summarization

attribute-policy

Sets attributes except the AS-PATH attribute for the

summary route. The same work can be done by using the

peer route-policy command.

Description

Use the aggregate command to create a summary route in the BGP routing table.

Use the undo aggregate command to remove a summary route.

By default, no summary route is configured.

 Note:

The suppress-policy keyword takes priority over the keyword detail-suppressed.

Examples

# In BGP view, create a summary of 192.213.0.0/16 in the BGP routing table.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] aggregate 192.213.0.0 255.255.0.0

# In BGP-VPN instance view, create a summary of 192.213.0.0/16 in BGP routing table

(the VPN has been created).

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<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] ipv4-family vpn-instance vpn1

[Sysname-bgp-vpn1] aggregate 192.213.0.0 255.255.0.0

1.1.2 balance (BGP/BGP-VPN instance view)

Syntax

balance number

undo balance

View

BGP view, VPN instance view

Default Level

2: System level

Parameters

number: Number of BGP routes for load balancing. When it is set to 1, load balancing is

disabled.

Description

Use the balance command to configure the number of BGP routes for load balancing.

Use the undo balance command to disable load balancing.

By default, no load balancing is configured.

Unlike IGP, BGP has no explicit metric for making load balancing decision. Instead, it

implements load balancing using route selection rules.

Related commands: display bgp routing-table.

Examples

# In BGP view, set the number of routes participating in BGP load balancing to 2.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] balance 2

# In BGP-VPN instance view, set the number of routes participating in BGP load

balancing to 2 (the VPN has been created).

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] ipv4-family vpn-instance vpn1

[Sysname-bgp-vpn1] balance 2

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1.1.3 bestroute as-path-neglect (BGP/BGP-VPN instance view)

Syntax

bestroute as-path-neglect

undo bestroute as-path-neglect

View

BGP view, BGP-VPN instance view

Default Level

2: System level

Parameters

None

Description

Use the bestroute as-path-neglect command to ignore the AS_PATH attribute during

best route selection.

Use the undo bestroute as-path-neglect command to take the AS_PATH as a factor

during best route selection.

By default, the device takes AS_PATH as a factor when selecting the best route.

Examples

# In BGP view, ignore AS_PATH in route selection.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] bestroute as-path-neglect

# In BGP-VPN instance view, ignore AS_PATH in route selection (the VPN has been

created).

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] ipv4-family vpn-instance vpn1

[Sysname-bgp-vpn1] bestroute as-path-neglect

1.1.4 bestroute compare-med (BGP/BGP-VPN instance view)

Syntax

bestroute compare-med

undo bestroute compare-med

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View

BGP view, BGP-VPN instance view

Default Level

2: System level

Parameters

None

Description

Use the bestroute compare-med command to enable the comparison of the MED for

paths from each AS.

Use the undo bestroute compare-med command to disable this comparison.

This comparison is not enabled by default.

Caution:

After the bestroute compare-med command is executed, the balance command does

not take effect.

Examples

# In BGP view, enable the comparison of MEDs for paths from each AS when selecting

the best route.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] bestroute compare-med

# In BGP-VPN instance view, enable the comparison of MED for paths from each AS

when selecting the best route. (The VPN has been created).

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] ipv4-family vpn-instance vpn1

[Sysname-bgp-vpn1] bestroute compare-med

1.1.5 bestroute med-confederation (BGP/BGP-VPN instance view)

Syntax

bestroute med-confederation

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undo bestroute med-confederation

View

BGP view, BGP-VPN instance view

Default Level

2: System level

Parameters

None

Description

Use the bestroute med-confederation command to enable the comparison of the

MED for paths from confederation peers to select the optimal route.

Use the undo bestroute med-confederation command to disable the comparison.

The comparison is not enabled by default.

The system only compares MED values for paths from peers within the confederation.

Paths from external ASs are advertised throughout the confederation without MED

comparison.

Examples

# In BGP view, enable the comparison of the MED for paths from peers within the

confederation.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] bestroute med-confederation

# In BGP-VPN instance view, enable the comparison of the MED for paths from peers

within the confederation. (The VPN has been created).

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] ipv4-family vpn-instance vpn1

[Sysname-bgp-vpn1] bestroute med-confederation

1.1.6 bgp

Syntax

bgp as-number

undo bgp [ as-number ]

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View

System view

Default Level

2: System level

Parameters

as-number: Local AS number.

Description

Use the bgp command to enable BGP and enter the BGP view.

Use the undo bgp command to disable BGP.

By default, BGP is not enabled.

Examples

# Enable BGP and set local AS number to 100.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp]

1.1.7 compare-different-as-med (BGP/BGP-VPN instance view)

Syntax

compare-different-as-med

undo compare-different-as-med

View

BGP view, BGP-VPN instance view

Default Level

2: System level

Parameters

None

Description

Use the compare-different-as-med command to enable the comparison of the MED

for paths from peers in different ASs.

Use the undo compare-different-as-med command to disable the comparison.

The comparison is disabled by default.

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If there are several paths for one destination available, the path with the smallest MED

is selected.

Do not use this command unless associated ASs adopt the same IGP protocol and

routing selection method.

Examples

# In BGP view, enable to compare the MED for paths from peers in different ASs.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] compare-different-as-med

# In BGP-VPN instance view, enable to compare the MED for paths from peers in

different ASs (The VPN has been created).

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] ipv4-family vpn-instance vpn1

[Sysname-bgp-vpn1] compare-different-as-med

1.1.8 confederation id

Syntax

confederation id as-number

undo confederation id

View

BGP view

Default Level

2: System level

Parameters

as-number: Number of the AS that contains multiple sub-ASs.

Description

Use the confederation id command to configure a confederation ID.

Use the undo confederation id command to remove a specified confederation.

By default, no confederation ID is configured.

Configuring a confederation can reduce IBGP connections in a large AS. You can split

the AS into several sub-ASs, and each sub-AS remains fully meshed. These sub-ASs

form a confederation. Key IGP attributes of a route, such as the next hop, MED, local

preference, are not discarded when crossing each sub-AS. The sub-ASs still look like a

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whole from the perspective of other ASs. This can ensure the integrity of the former AS,

and solve the problem of too many IBGP connections in the AS.

Related commands: confederation nonstandard, confederation peer-as.

Examples

# Confederation 9 consists of four sub-ASs, namely, 38, 39, 40 and 41. The peer

10.1.1.1 is a member of the confederation while the peer 200.1.1.1 is outside of the

confederation. Take sub AS 41 as an example.

<Sysname> system-view

[Sysname] bgp 41

[Sysname-bgp] confederation id 9

[Sysname-bgp] confederation peer-as 38 39 40

[Sysname-bgp] group Confed38 external

[Sysname-bgp] peer Confed38 as-number 38

[Sysname-bgp] peer 10.1.1.1 group Confed38

[Sysname-bgp] group Remote98 external

[Sysname-bgp] peer Remote98 as-number 98

[Sysname-bgp] peer 200.1.1.1 group Remote98

1.1.9 confederation nonstandard

Syntax

confederation nonstandard

undo confederation nonstandard

View

BGP view

Default Level

2: System level

Parameters

None

Description

Use the confederation nonstandard command to make the device compatible with

devices not compliant with RFC3065 in the confederation.

Use the undo confederation nonstandard command to restore the default.

By default, all devices in the confederation comply with RFC3065.

All devices should be configured with this command to interact with those nonstandard

devices in the confederation.

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Related commands: confederation id, confederation peer-as.

Examples

# AS100 contains devices not compliant with RFC3065 and comprises two sub-ASs,

64000 and 65000.

<Sysname> system-view

[Sysname] bgp 64000

[Sysname-bgp] confederation id 100

[Sysname-bgp] confederation peer-as 65000

[Sysname-bgp] confederation nonstandard

1.1.10 confederation peer-as

Syntax

confederation peer-as as-number-list

undo confederation peer-as [ as-number-list ]

View

BGP view

Default Level

2: System level

Parameters

as-number-list: Sub-AS number list. Up to 32 sub-ASs can be configured in one

command line. The expression is as-number-list = as-number &<1-32>, in which

as-number specifies a sub-AS number, and &<1-32> indicates up to 32 numbers can

be specified.

Description

Use the confederation peer-as command to specify confederation peer sub-ASs.

Use the undo confederation peer-as command to remove specified confederation

peer sub-ASs.

By default, no confederation peer sub-ASs are configured.

Before this configuration, the confederation id command must be used to specify the

confederation for the sub-ASs.

If the undo confederation peer-as command without the as-number-list argument is

used, all confederation peer sub-ASs are removed.

Related commands: confederation nonstandard, confederation id.

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Examples

# Specify confederation peer sub ASs 2000 and 2001.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] confederation id 10

[Sysname-bgp] confederation peer-as 2000 2001

1.1.11 dampening (BGP/BGP-VPN instance view)

Syntax

dampening [ half-life-reachable half-life-unreachable reuse suppress ceiling |

route-policy route-policy-name ] *

undo dampening

View

BGP view, BGP-VPN instance view

Default Level

2: System level

Parameters

half-life-reachable: Half-life for reachable routes in minutes. By default, the value is 15

minutes.

half-life-unreachable: Half-life for unreachable routes in minutes. By default, the value

is 15 minutes.

reuse: Reuse threshold value for suppressed routes. A suppressed route whose

penalty value decreases under the value is reused. By default, the reuse value is 750.

suppress: Suppression threshold. The route with a penalty value higher than the

threshold is suppressed. The default value is 2000.

ceiling: Ceiling penalty value, which must be bigger than the suppress value. By default,

the value is 16000.

route-policy-name: Routing policy name.

half-life-reachable, half-life-unreachable, reuse, suppress and ceiling are mutually

dependent. Once any one is configured, all the others should also be specified

accordingly.

Description

Use the dampening command to enable BGP route dampening and/or configure

dampening parameters.

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Use the undo dampening command to disable route dampening.

By default, no route dampening is configured.

The command dampens only EBGP routes rather than IBGP routes.

Related commands: reset bgp dampening, reset bgp flap-info, display bgp

routing-table dampened, display bgp routing-table dampening parameter,

display bgp routing-table flap-info.

Examples

# In BGP view, enable BGP route dampening and configure dampening parameters.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] dampening 15 15 1000 2000 10000

# In BGP-VPN instance view, enable BGP route dampening and configure dampening

parameters. (the VPN has been created).

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] ipv4-family vpn-instance vpn1

[Sysname-bgp-vpn1] dampening 15 15 1000 2000 10000

1.1.12 debugging bgp

Syntax

debugging bgp [ ip-address ] { all | detail | event | graceful-restart | timer |

{ keepalive | open | packet | raw-packet | route-refresh } [ receive | send ]

[ verbose ] }

debugging bgp update [ acl acl-number | ip-prefix ip-prefix-name | ipv4 | l2vpn |

label-route | vpn-instance vpn-instance-name | vpnv4 ] [ peer { ip-address |

group-name } ] [ receive | send ] [ verbose ]

undo debugging bgp [ ip-address ] { all | detail | event | graceful-restart | timer |

{ keepalive | open | packet | raw-packet | route-refresh } [ receive | send ]

[ verbose

] }

undo debugging bgp update [ acl acl-number | ip-prefix ip-prefix-name | ipv4 | l2vpn

| label-route | vpn-instance vpn-instance-name | vpnv4 ] [ peer { ip-address |

group-name } ] [ receive | send ] [ verbose ]

View

User view

Default Level

1: Monitor level

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Parameters

ip-address: IP address of a peer.

all: Enables all BGP debugging.

detail: Enables BGP detailed information debugging.

event: Enables BGP event debugging.

graceful-restart: Enables BGP GR debugging.

timer: Enables BGP timer debugging.

keepalive: Enables BGP keepalive packets debugging.

open: Enables BGP open packets debugging.

packet: Enables BGP packets debugging.

raw-packet: Enables BGP raw packets debugging.

route-refresh: Enables BGP route-refresh packets debugging.

receive: Received BGP packets.

send: Sent BGP packets.

Verbose: Displays detailed debugging information.

update: Enables BGP update packets debugging.

acl acl-number: Uses an ACL to filter output packet debugging information.

ip-prefix ip-prefix-name: Uses an IP prefix list to filter output packet debugging

information.

ipv4: Enables IPv4 packet debugging.

l2vpn: Enables L2VPN packet debugging.

label-route: Enables labeled BGP route debugging.

vpnv4: Enables VPNv4 packet debugging.

vpn-instance vpn-instance-name: Enables packet debugging for the VPN instance.

peer ip-address/group-name: Enables BGP packet debugging with the BGP peer or

peer group.

Description

Use the debugging bgp command to enable specified BGP debugging.

Use the undo debugging bgp command to disable specified BGP debugging.

Enabling any debugging will decrease system performance; therefore, disable the

debugging timely after debugging.

Examples

# Enable BGP detailed debugging when a BGP peer relationship is being established.

<Sysname> debugging bgp detail

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*Aug 24 14:12:13:674 2006 Sysname RM/6/RMDEBUG:

BGP_L3VPN: Recv UPDATE with following RD 100:1 destination 11.1.1.1 - Received

New VPNv4 Route with Ext-Community NULL..Ignoring Route

// BGP received an UPDATE message with RD 100:1, destination address 11.1.1.1.

The Ext-Community of the new VPNv4 route is NULL and therefore the route was

ignored.

DeLocRemCross: Deleting route From Target Instance.

// The route was deleted from the instance.

1.1.13 default ipv4-unicast

Syntax

default ipv4-unicast

undo default ipv4-unicast

View

BGP view

Default Level

2: System level

Parameters

None

Description

Use the default ipv4-unicast command to enable the use of IPv4 unicast address

family for all peers.

Use the undo default ipv4-unicast command to disable the use of IPv4 unicast

address family for all peers.

The use of IPv4 unicast address family is enabled by default.

Examples

# Enable IPv4 unicast address family for all neighbors.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] default ipv4-unicast

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1.1.14 default local-preference (BGP/BGP-VPN instance view)

Syntax

default local-preference value

undo default local-preference

View

BGP view, BGP-VPN instance view

Default Level

2: System level

Parameters

value: Default local preference. The larger the value, the higher the preference.

Description

Use the default local-preference command to configure the default local preference.

Use the undo default local-preference command to restore the default value.

The default local preference is 100.

Using this command can affect BGP route selection.

Examples

# In BGP view, set the default local preference to 180.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] default local-preference 180

# In BGP-VPN instance view, set the default local preference to 180 (the VPN has been

created).

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] ipv4-family vpn-instance vpn1

[Sysname-bgp-vpn1] default local-preference 180

1.1.15 default med (BGP/BGP-VPN instance view)

Syntax

default med med-value

undo default med

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View

BGP view, BGP-VPN instance view

Default Level

2: System level

Parameters

med-value: Default MED value.

Description

Use the default med command to specify a default MED value.

Use the undo default med command to restore the default.

By default, the default med-value is 0.

Multi-exit discriminator (MED) is an external metric for routes. Different from local

preference, MED is exchanged between ASs and will stay in the AS once it enters the

AS. The route with a lower MED is preferred. When a device running BGP obtains

several routes with an identical destination but different next-hops from various external

peers, it will select the best route depending on the MED value. In the case that all other

conditions are the same, the system first selects the route with the smallest MED as the

best external route.

Examples

# In BGP view, configure the default MED as 25.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] default med 25

# In BGP-VPN instance view, configure the default MED as 25 (the VPN has been

created).

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] ipv4-family vpn-instance vpn1

[Sysname-bgp-vpn1] default med 25

1.1.16 default-route imported (BGP/BGP-VPN instance view)

Syntax

default-route imported

undo default-route imported

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View

BGP view, BGP-VPN instance view

Default Level

2: System level

Parameters

None

Description

Use the default-route imported command to allow default route redistribution into the

BGP routing table.

Use the undo default-route imported command to disallow the redistribution.

By default, default route redistribution is not allowed.

Using the default-route imported command cannot redistribute default routes. To do

so, use the import-route command.

Related commands: import-route.

Examples

# In BGP view, allow default route redistribution from OSPF into BGP.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] default-route imported

[Sysname-bgp] import-route ospf 1

# In BGP-VPN instance view, enable redistributing default route from OSPF into BGP

(the VPN has been created).

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] ipv4-family vpn-instance vpn1

[Sysname-bgp-vpn1] default-route imported

[Sysname-bgp-vpn1] import-route ospf 1

1.1.17 display bgp group

Syntax

display bgp group [ group-name ]

View

Any view

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H3C S9500 Series Command Manual

H3C S9500 Series Command Manual

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