05-16-2024 11:27 AM
po1
Nexus 9k both
e1/10
channel-group 10 mode active
po10
vpc 10
I have more VPCs than just this one, ALL of them are up with a native vlan of 999 and there are no native vlan log messages on either nexus. Could this be a bug on the c1300?
Thanks!
Charlie
Solved! Go to Solution.
05-20-2024 08:16 AM
So good news! I found the issue and I no longer have native vlan mismatch messages. Here are the details:
If you config the native vlan for the gig interfaces and the port-channel it will act like it took the command, but if you go into the web gui and look at the port-channel members CDP interface details it will report a native vlan of 1096 or something like that, you can not view the cpd interface info for the port-channel.
To fix this in the GUI you have to configure the "LAG" in "port to VLAN" under the VLAN Management and make the membership type of the LAG for the selected VLAN (the VLAN that is the native) to untagged.
CLI solution
simply allow the native vlan across the trunk in addition to the native vlan command.
Thanks everyone!!!!
05-16-2024 11:40 AM - edited 05-17-2024 02:07 AM
Before do anything ypu must match the stp mode in all NSK and SW
Second it better to make mode active in SW also, it better than use passive
MHM
05-16-2024 02:07 PM
I will check the stp settings, but the c1300 does not support the command active, the auto command it the only option to get a “active” channel group
the iOS on the c1300 seems to be rather watered down and syntax is rather different and the web ui is difficult to work with
-Charlie
05-16-2024 02:34 PM - edited 05-17-2024 02:08 AM
MHM
05-17-2024 02:10 AM
Hi Again
Do in NSK
Show port-channel summary
Check if the port is SU and it member is P
Then do
Show spanning tree
Check the status of PO to this SW
MHM
05-17-2024 05:36 AM
port-channel on nexus is SU and it member is P
I looked at spanning tree on c1300 and realized that I needed to disable it on the interfaces and the po. Doing this increased the time between error messages from 1 minute to 4 minutes.
-Charlie
05-17-2024 06:40 AM
Show interface trunk
Can you check native vlan in trunk
Also in NSK do
Show vpc breif <-share it here
MHM
05-16-2024 02:26 PM
I have a native vlan mismatch on a trunked port channel between a C1300 and 2 nexus 9336c-fx2
can you post the logs here to understand the issue, as per the configuration you did, not seen any obvious, since C1300 only support ON - NON-LACP - Auto - LACP.
VLAN 999 created on C1300 ?
Other information to confrm, you have Nexus 9K running vPC, so both the switches have identical configuration for the vPC to work.
Hope the port-channel up and only native VLAN is the worry bit here ?
what version of code running on both the devices ?
05-17-2024 05:51 AM
Cant post the logs, VLAN 999 is created, vPC peer-link is up and the vPC to the c1300 is up. PO on c1300 is up.
native VLAN mismatch is the only issue to address
software NXOS 10.4.3
software c1300 4.0.0.93
Charlie
05-19-2024 03:08 AM
Cant post the logs - i am afraid any more we can support here - if don't have visibility.
native VLAN mismatch is the only issue to address
by saying that above, ignore with log discriminator - if that is log only.
05-20-2024 08:16 AM
So good news! I found the issue and I no longer have native vlan mismatch messages. Here are the details:
If you config the native vlan for the gig interfaces and the port-channel it will act like it took the command, but if you go into the web gui and look at the port-channel members CDP interface details it will report a native vlan of 1096 or something like that, you can not view the cpd interface info for the port-channel.
To fix this in the GUI you have to configure the "LAG" in "port to VLAN" under the VLAN Management and make the membership type of the LAG for the selected VLAN (the VLAN that is the native) to untagged.
CLI solution
simply allow the native vlan across the trunk in addition to the native vlan command.
Thanks everyone!!!!
05-20-2024 08:27 AM
thanks for update us
have a nice day
MHM
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide