Nexus 3548 : vlan is not allowed on peer-link

[Andrew Cormier]

Hi, I had posted earlier but I think I have almost figured out the issue.. just not how to resolve it. I have two nexus switches connected together with PO5. Each nexus has a PO6 to connect to a single Cat3750 VLAN 46 on one of the switches is showing %ETHPORT-3-IF_ERROR_VLANS_SUSPENDED: VLANs 46 on Interface port-channel6 are being suspended. (Reason: Vlan is not allowed on Peer-link) Oddly the other switch seems to ok with VLAN 46. I also see this show vpc consistency-parameters vpc 6 ... Local Remote. Allowed VLANs - 1,31,34,46,200,600-605 1,31,34,46,200,600-605 Local suspended VLANs - 46 - I just dont get it. Both switches are almost identical in their running configs. Any thoughts?

[Reza Sharifi]

Hi,

Can you post the config from both switches including the VPC peer link config?

also config from the 3750.

[Andrew Cormier]

well the funny thing about the nexus configs is that I compared them in notepad ++ and they are the same.

vrf context management
  ip route 0.0.0.0/0 10.31.0.9
vlan 1
vlan 31
  name VLAN0031-VOIP
vlan 34
  name vlan_nutanix
vlan 46
  name VLAN0046-MITEL
vlan 200
  name VLAN0200-ExchDAG
vlan 600
  name VLAN0600-VMOTION
vlan 601
  name VLAN0601-DMZ1
vlan 602
  name VLAN0602-DMZ2
vlan 603
  name VLAN0603-DMZ3
vlan 604
  name VLAN0604-DMZ4
vlan 605
  name VLAN0605-PNET
vpc domain 1
  role priority 110
  peer-keepalive destination 10.31.61.11 source 10.31.61.12
  auto-recovery

interface port-channel5
  switchport mode trunk
  spanning-tree port type network
  speed 10000
  vpc peer-link

interface port-channel6
  switchport mode trunk
  spanning-tree port type normal
  speed 1000
  vpc 6

interface port-channel11
  switchport mode trunk
  switchport trunk allowed vlan 1,31,34,46,200,600-605
  spanning-tree port type edge trunk
  speed 10000
  vpc 11

interface port-channel12
  switchport mode trunk
  switchport trunk allowed vlan 1,31,34,46,200,600-605
  spanning-tree port type edge trunk
  speed 10000
  vpc 12

interface port-channel13
  switchport mode trunk
  switchport trunk allowed vlan 1,31,34,46,200,600-605
  spanning-tree port type edge trunk
  speed 10000
  vpc 13

interface port-channel14
  switchport mode trunk
  switchport trunk allowed vlan 1,31,34,46,200,600-605
  spanning-tree port type edge trunk
  speed 10000
  vpc 14

interface port-channel15
  switchport mode trunk
  switchport trunk allowed vlan 1,31,34,46,200,600-605
  spanning-tree port type edge trunk
  speed 10000
  vpc 15

interface Ethernet1/1
  switchport mode trunk
  speed 1000
  channel-group 6 mode active

interface Ethernet1/2
  switchport mode trunk
  speed 1000
  channel-group 6 mode active

interface Ethernet1/3
  description Nutanix
  switchport mode trunk
  switchport trunk allowed vlan 1,31,34,46,200,600-605
  spanning-tree port type edge trunk
  channel-group 11

interface Ethernet1/4
  description Nutanix
  switchport mode trunk
  switchport trunk allowed vlan 1,31,34,46,200,600-605
  spanning-tree port type edge
  channel-group 12

interface Ethernet1/5
  description Nutanix
  switchport mode trunk
  switchport trunk allowed vlan 1,31,34,46,200,600-605
  spanning-tree port type edge
  channel-group 13

interface Ethernet1/6
  description Nutanix
  switchport mode trunk
  switchport trunk allowed vlan 1,31,34,46,200,600-605
  spanning-tree port type edge
  channel-group 14

interface Ethernet1/7
  description Nutanix
  switchport mode trunk
  switchport trunk allowed vlan 1,31,34,46,200,600-605
  spanning-tree port type edge trunk
  channel-group 15

interface Ethernet1/47
  switchport mode trunk
  channel-group 5 mode active

interface Ethernet1/48
  switchport mode trunk
  channel-group 5 mode active

+++++++++++++++++++++++++++++++++++++++++++++++++++++++

3750 confing

interface Port-channel6
 switchport trunk encapsulation dot1q
 switchport mode trunk
!

!
interface GigabitEthernet1/0/33
 description ch nexus1-1
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-group 6 mode active
!
interface GigabitEthernet1/0/34
 description ch nexus1-2
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-group 6 mode active
!
interface GigabitEthernet1/0/35
 description ch nexus2-1
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-group 6 mode active
!
interface GigabitEthernet1/0/36
 description ch nexus2-2
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-group 6 mode active
!

!
interface Vlan46
 ip address 172.17.16.1 255.255.255.0

[Reza Sharifi]

The config looks good.

Can you try shut and no shut po6?

Also, does "sh int trunk" show all vlans being on vpc peer link (po5)?

HTH
 

[Andrew Cormier]

Well sho int trunk does show all vlans being on po5 on both switches (vlan 1-4094)

On switch 2 it still shows Vlan 46 as being err disabled (see below)

Cant really do an shut/noshut on PO6 without a maintenance window :( I will see what I can do)

I did (desparately) try a status active and a no shut on vlan 46

Port          Vlans Err-disabled on Trunk
-----------------------------------------------------
Eth1/1        46
Eth1/2        46

Po5           none
Po6           46

[Andrew Cormier]

So I couldnt shut/noshut PO6 but I could do it to vlan 46. Guess what.. it worked.

[Reza Sharifi · Accepted solution]

Glad to know it is working. Some times resting the vlan, interface or po interface does the job.

HTH