Nexus 7000 vPC suspended VLAN problem

[Nicholas Poole]

I am trying to connect a Cat3560G switch to an N7K pair via a vPC.  The VLANs I wish to trunk are being suspended, I am getting the following error messages:

2010 Jun 22 17:03:36 N7K-Core1 %ETHPORT-3-IF_ERROR_VLANS_SUSPENDED: VLANs 2,301 on Interface port-channel2 are being suspended. (Reason: Vlan is not allowed on Peer-link)

The VLANs do exist , but a STP instance isnt created for it (I am using RPVST);

N7K-Core1# sh vlan id 2

VLAN Name                             Status    Ports

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

2    VLAN0002                         active    Po2, Po75

N7K-Core1# sh spanning-tree vlan 2

ERROR: Spanning tree instance(s) for vlan does not exist.

Port       Vlans Err-disabled on Trunk

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

Eth1/9     none

Eth1/10    none

Eth1/17    2,301

Eth1/18    2,301

Eth1/25    2,301

Eth1/26    2,301

Eth2/2     none

Eth10/1    none

Eth10/2    2,301

Po2        2,301

Po75       2,301

Po99       none

The VLANs are allowed on the trunk (it by default allows all)

interface port-channel1

  description * vPC Peer-Link *

  vpc peer-link

  spanning-tree port type network

I have turned off bridge assurance as a test but no no avail.

Any ideas?

[scneima01]

HA! 6 years ago. I'll post my feedback anyway since my solution doesn't seem to be here and I keep running into this problem. 

I did...

vlan blah

shut

!then

!

vlan blah

no shut

Badabing! Looks like vpc or something needed a little refresh and that was enough to get the switch to check again.

[sanders.ryan]

I ran into same exact problem...  Everything on the interface needs to match exactly to the other interfaces. I was missing the below from the edge switch side.

interface TenGigabitThernet1/0/1

 description vpc 1015

 switchport trunk native vlan xx

 switchport trunk allowed vlan x,x,x,x

 switchport mode trunk

 switchport nonegotiate

 spanning-tree link-type point-to-point

 channel-group 1 mode active

interface TenGigabitThernet1/0/2

 description vpc 1015

 switchport trunk native vlan xx

 switchport trunk allowed vlan x,x,x,x

 switchport mode trunk

 switchport nonegotiate

 spanning-tree link-type point-to-point

 channel-group 1 mode active

 ip dhcp snooping trust  <<<<<<< This is what I was missing on the te1/0/1 interface which caused it

                                                              to go into "suspended" Once I added it came right up.

[patricekoushesh]

 I know the original post was for years ago.

Just to share. I had the same issue today. The mistake was that I did not define the desired VLAN on both vPC peers and got the same errors. So do not forget to define the VLAN on both vPC switches.

I wish I helped.

Regards,

Patris