Compatibility Parameters For Vpc Peer Links - Cisco Nexus 3548 Configuration Manual

Compatibility Parameters for vPC Peer Links

Note We recommend that you configure the vPC peer-keepalive link on the Cisco Nexus device to run in the
management VRF using the mgmt 0 interfaces. If you configure the default VRF, ensure that the vPC peer
link is not used to carry the vPC peer-keepalive messages.
Compatibility Parameters for vPC Peer Links
Many configuration and operational parameters must be identical on all interfaces in the vPC. After you enable
the vPC feature and configure the peer link on both vPC peer switches, Cisco Fabric Services (CFS) messages
provide a copy of the configuration on the local vPC peer switch configuration to the remote vPC peer switch.
The system then determines whether any of the crucial configuration parameters differ on the two switches.
Enter the show vpc consistency-parameters command to display the configured values on all interfaces in
the vPC. The displayed configurations are only those configurations that would limit the vPC peer link and
vPC from coming up.
The compatibility check process for vPCs differs from the compatibility check for regular EtherChannels.
New Type 2 Consistency Check on the vPC Port-Channels
A new type 2 consistency check has been added to validate the switchport mac learn settings on the vPC
port-channels. The CLI show vpc consistency-check vPC <vpc no.> has been enhanced to display the local
and peer values of the switchport mac-learn configuration. Because it is a type 2 check, vPC is operationally
up even if there is a mismatch between the local and the peer values, but the mismatch can be displayed from
the CLI output.
switch# sh vpc consistency-parameters vpc 1112
Name
-------------
-----------------------
Shut Lan
STP Port Type
STP Port Guard
STP MST Simulate PVST
nve configuration
lag-id
0-23-4-ee-be-64, 8458,
(8000,
f4-4e-5-84-5e-3c, 457,
mode
Speed
Duplex
Port Mode
Native Vlan
MTU
Admin port mode
Switchport MAC Learn
Newly added consistency parameter
vPC card type
Cisco Nexus 3548 Switch NX-OS Interfaces Configuration Guide, Release 9x
60
Legend:
Type 1 : vPC will be suspended in case of mismatch
Type Local Value
---- ----------------------
1 No
1 Default
1 None
1 Default
1 nve
1 [(fa0,
0-23-4-ee-be-64, 8458,
0, 0), (8000,
f4-4e-5-84-5e-3c, 457,
0, 0)]
1 active
1 10 Gb/s
1 full
1 trunk
1 1
1 1500
1
2 Enable
1 Empty
Configuring Virtual Port Channels
Peer Value
No
Default
None
Default
nve
[(fa0,
0, 0),
0, 0)]
active
10 Gb/s
full
trunk
1
1500
Disable>
Empty