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Cisco Employee

N7K Vlan issue

Dear N7K expert,

We are using N7K switch in our lab for performance testing, I have a issue that I couldn't figure out why, hope someone can help.

Basically I found sometimes when I configure a port as trunked port, then add vlans to this port, but it seems that port still doesn't belongs to those vlan if I use "show vlan id xx". I'm using 5.1.5 software release, here's my config and command output:

Demo-7K# show run int eth 9/18

!Command: show running-config interface Ethernet9/18

!Time: Wed Oct 12 04:34:40 2011

version 5.1(5)

interface Ethernet9/18

  switchport mode trunk

  switchport trunk allowed vlan 163,203

  spanning-tree bpdufilter enable

  no shutdown

Demo-7K#

Demo-7K#

Demo-7K# show vlan id 163

VLAN Name                             Status    Ports

---- -------------------------------- --------- -------------------------------

163  VLAN0163                         active    Eth3/16, Eth3/32, Eth3/33

                                                Eth3/34, Eth3/35, Eth9/16

                                                Eth10/1, Eth10/21        ----------------------> interface 9/18 is not here

VLAN Type  Vlan-mode

---- ----- ----------

163  enet  CE    

Remote SPAN VLAN

----------------

Disabled

Primary  Secondary  Type             Ports

-------  ---------  ---------------  -------------------------------------------

Demo-7K#

Thanks for help

Ning Chen

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Cisco Employee

N7K Vlan issue

I'm running 5.2.1 and do see my trunks in my 'show vlan id x' output...but check to see if you see those vlans carried on the trunk "show int e9/18 trunk".  I know in most IOS switches we don't put trunk links in the 'show vlan' output.

I can't downgrade mine to 5.1.5 right now to see if i see the same behavior as you or not.

Also is that trunk link up and passing traffic?

Highlighted
Cisco Employee

N7K Vlan issue

Thanks Chad, yes I can see my other trunked ports in "show vlan id xx", the link is up and doesn't pass any traffic. The strange thing is I have two ports behave like this, and both ports used to work before, and suddently stop passing traffic. Troubleshooting shows they are not belong to any vlans any more.

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