Field Notice: FN - 64210 - APIC-L2/M2 Server Network Mode Set Incorrectly - Configuration Change Recommended

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Updated:February 5, 2019

Document ID:FN64210

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Notice

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.

Revision History

Revision	Publish Date	Comments
1.0	22-Feb-17	Initial Release
10.0	11-Oct-17	Migration to new field notice system
10.1	13-Oct-17	add cdet
10.2	05-Feb-19	Fixed Broken Image Links

Products Affected

Affected Product ID	Comments
APIC-CLUSTER-M2
APIC-CLUSTER-L2
APIC-M2
APIC-L2
APIC-SERVER-M2
APIC-SERVER-L2
APIC-SERVER-L2=	Part Alternate

Defect Information

Defect ID	Headline
CSCvg31692	FN64210 - APIC-L2/M2 Server Network Mode Set Incorrectly - Configuration Change Recommended

Problem Description

Cisco has recently identified a defect in the Cisco Application Centric Infrastructure (ACI) that could potentially affect customers who run these Cisco Application Policy Infrastructure Controller (APIC) appliances:

Server - APIC-Cluster-L2
Server - APIC-Cluster-M2
Server - APIC-L2
Server - APIC-M2
Server - APIC-Server-L2
Server - APIC-Server-M2

The APIC-L2/M2 server Cisco Integrated Management Controller (CIMC) network mode was set to Shared_Lom_ext mode instead of Dedicated mode. APIC servers have a default requirement to set the network mode to Dedicated mode, or it can be reconfigured to Shared_Lom mode which is also supported. Shared_Lom_ext mode is incorrect and this setting causes some issues in the network connectivity and discovery does not function.

Background

In a short time span in Cisco manufacturing the network mode was being set to Shared_Lom_ext mode, not the correct setting of Dedicated mode.

Problem Symptom

Network connectivity issues will occur and discovery will not function.

Workaround/Solution

APIC servers with an incorrect CIMC network mode can be reconfigured to Dedicated mode or Shared_Lom mode through the CLI or GUI. Complete these steps in order to reconfigure the CIMC mode to Dedicated mode:

Make sure that there is a cable connected to the CIMC MGMT port in addition to the Ethernet ports on the motherboard (LOM).
Power up the unit and log in with your username and password.

Enter these commands from the CIMC prompt:

C240-FCH1844V103 /cimc/network # set mode dedicated
Warning: Invalid combination of "mode" and "redundancy"
"redundancy" is set to "active-active" but valid value(s) include: "none"
Enabling auto-negotiation by default.
C240-FCH1844V103 /cimc/network *# set redundancy none
C240-FCH1844V103 /cimc/network *# commit
Changes to the network settings will be applied immediately.
You may lose connectivity to the Cisco IMC and may have to log in again.
Do you wish to continue? [y/N] y
C240-FCH1844V103 /cimc/network #
C240-FCH1844V103 /cimc/network # show detail | no-more
Network Setting:
IPv4 Enabled: yes
IPv4 Address: 10.1.1.34
IPv4 Netmask: 255.255.255.0
IPv4 Gateway: 10.1.1.11
DHCP Enabled: yes
DDNS Enabled: yes
DDNS Update Domain:
Obtain DNS Server by DHCP: yes
Preferred DNS: 0.0.0.0
Alternate DNS: 0.0.0.0
IPv6 Enabled: no
IPv6 Address: ::
IPv6 Prefix: 64
IPv6 Gateway: ::
IPv6 Link Local: ::
IPv6 SLAAC Address: ::
IPV6 DHCP Enabled: no
IPV6 Obtain DNS Server by DHCP: no
IPV6 Preferred DNS: ::
IPV6 Alternate DNS: ::
VLAN Enabled: no
VLAN ID: 1
VLAN Priority: 0
Port Profile:
Hostname: C240-FCH1844V103
MAC Address: A0:EC:F9:39:16:6A
NIC Mode: dedicated
NIC Redundancy: none
VIC Slot: riser1
Auto Negotiate: yes
Admin Network Speed: auto
Admin Duplex: auto
Operational Network Speed: 100Mbps
Operational Duplex: full
C240-FCH1844V103 /cimc/network # show | grep NIC
C240-FCH1844V103 /cimc/network # show detail | grep NIC

NIC Mode: dedicated
NIC Redundancy: none

C240-FCH1844V103 /cimc/network #

Complete these steps in order to reconfigure the CIMC mode to Shared_Lom mode:

Power up the unit and log in with your username and password.

Enter these commands from the CIMC prompt:

C240-FCH1844V103 /cimc/network # set mode shared_lom
C240-FCH1844V103 /cimc/network *# commit
Changes to the network settings will be applied immediately.
You may lose connectivity to the Cisco IMC and may have to log in again.
Do you wish to continue? [y/N] y
C240-FCH1844V103 /cimc/network # show detail | no-more
Network Setting:
IPv4 Enabled: yes
IPv4 Address: 10.1.1.34
IPv4 Netmask: 255.255.255.0
IPv4 Gateway: 10.1.1.11
DHCP Enabled: yes
DDNS Enabled: yes
DDNS Update Domain:
Obtain DNS Server by DHCP: yes
Preferred DNS: 0.0.0.0
Alternate DNS: 0.0.0.0
IPv6 Enabled: no
IPv6 Address: ::
IPv6 Prefix: 64
IPv6 Gateway: ::
IPv6 Link Local: ::
IPv6 SLAAC Address: ::
IPV6 DHCP Enabled: no
IPV6 Obtain DNS Server by DHCP: no
IPV6 Preferred DNS: ::
IPV6 Alternate DNS: : :
VLAN Enabled: no
VLAN ID: 1
VLAN Priority: 0
Port Profile:
Hostname: C240-FCH1844V103
MAC Address: A0:EC:F9:39:16:6A
NIC Mode: shared_lom
NIC Redundancy: active-active
VIC Slot: riser1
Auto Negotiate: yes
Admin Network Speed: auto
Admin Duplex: auto
Operational Network Speed: 100Mbps
Operational Duplex: full
C240-FCH1844V103 /cimc/network # show | grep NIC
C240-FCH1844V103 /cimc/network # show detail | grep NIC

NIC Mode: shared_lom
NIC Redundancy: active-active

C240-FCH1844V103 /cimc/network #

If you instead use the CIMC GUI, then navigate to the Admin tab in order to change the NIC Mode and NIC Redundancy as required as shown in these screenshots.

Configure the CIMC Network Mode to Dedicated Mode from the GUI

Configure the CIMC Network Mode to Shared_Lom Mode from the GUI

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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