NOTE: Make sure you have the latest CMC firmware and latest BIOS, iDRAC, CPLD, LC and NIC firmware for the
modular server. To check the CMC/modular server iDRAC version, from Telnet/SSH run the getversion command or
from CMC Web Interface , go to Chassis Overview → Update or Server Overview → Update, and select the
modular server slot from left pane. To get the latest CMC firmware visit the Dell Support site at Support → Drivers
& Downloads → Enterprise IT → Servers, Storage & Networking → Poweredge → Poweredge M1000E or
Modular Server (M620, M820) and so on.
Fabric Mismatch
The first modular server or IOM inserted in the chassis decides the uniformity and sequence of a Fabric type. Fabric
mismatch is noticed if there is no uniformity among the Mezzanine Cards or IOMs present in B and C fabrics of
previously inserted or the newly inserted modular servers or IOM. There are three types of invalid configurations and
suggested solutions:
• Invalid Mezzanine Card or LOM configuration - In this configuration, a newly installed server’s fabric type is
different from the existing IOM fabric. An invalid Mezzanine Card (MC) configuration occurs when a single
server’s LOM or Mezzanine Card(MC) is not supported by its corresponding IOM. In this case, though all the
other servers in the chassis are powered on, the server with the mismatched MC card is not allowed to power
on. The power button on the server flashes Amber to alert a fabric mismatch. For example, Active working
modular server-1 in SLOT-1 has a Converged network adapter (CNA) or Ethernet Mezzanine Card (MC) in Fabric
B and now when you try to boot a new modular server-2 in (SLOT-2) with Fiber Channel (FC) card in Fabric B, it
does not allow modular server-2 to boot and a fabric mismatch error is observed. The reason for the error is MC
in Fabric B of modular server-1 in SLOT-1 does not match with MC in Fabric B of modular server-2 in SLOT-2. To
fix mismatch errors, remove MC and replace with CNA or Ethernet MC in modular server-2 to allow server-2 to
boot.
• Invalid IOM-Mezzanine Card configuration – In this configuration, a newly installed IOM’s fabric type and the
resident Mezzanine Card’s fabric types do not match or they are incompatible. The mismatched IOM is in the
power-off state. CMC adds an entry to CMC and hardware logs stating the invalid configuration and the IOM
name. CMC causes the LED on the IOM with the error to blink. If CMC is configured to send alerts, it sends e-
mail and SNMP alerts for this event. For example, if a user has Ethernet or FCoE supported IOM in B1 fabric and
inserts FC Mezzanine Card in modular sever-1 of SLOT-1, modular server-1 does not boot as there is mismatch
between B1 IOM and MC in modular server. To resolve the issue, either replace B1 or B2 IOMs with FC type
IOMs or replace FC Mezzanine Card with Ethernet or CNA Mezzanine Card.
• Invalid IOM-IOM configuration - In this configuration, a newly installed IOM has a different or incompatible
fabric type from an IOM already installed in its group. CMC holds the newly installed IOM in powered-off state,
causes the IOM’s error LED to blink, and entries in CMC and hardware logs about the mismatch. For example, if
a user has an Ethernet or FCoE supported IOM in Fabric B1 and then inserts a FC support IOM in Fabric B2, a
fabric mismatch between B1 and B2 occurs and the chassis does not allow B2 IOM to boot up. To fix the issue,
insert the same type of IOMs in B1 and B2. To verify the IOMs and MC types present in the modular servers, log
in to CMC using RACADM (Telnet/SSH/Serial) and run the racadm getdcinfo and racadm getmodinfo commands.
No Power for M1000e Enclosure
1. Make sure that all Power Supply Units (PSUs) in the chassis are connected to AC or DC cord and status for each
PSU is online or standby. Check and replace the AC or DC cord if needed. Check and confirm that the power
distribution unit providing power to the power supply is operating correctly. If the failure persists, contact Dell
Technical Support to replace the PSU.
2. If the problem persists, check the system input power cap setting. If it is configured too low, any additional servers
do not power on.
3. If the problem persists, check that the PSU is connected to the same voltage as the other PSUs. If CMC detects a
PSU operating at a different voltage, the PSU is turned off and the status is Failed.
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