Interface on Nexus 5548 inactive, vlan not allowed on peer issue

[mike.mccollum1]

I've inherited the responsiilities of a pair of Nexus 5548s that are paired together using a port channel link.  I wasn't involved in the setup and I'm just  beginning to get a grasp on the differences between the Nexus and what I am used to. 

I am trying to create another Vlan on the Nexus.  I added Vlan 53 and changed a port on a FEX (Cisco 2K) connected to the Nexus.  I also added Vlan 53 to the other Nexus   The interface on the FEX now shows a status of inactive.  

I believe the issue is that the port-channel trunk is not passing Vlan 53 through to the other Nexus but I don't know why.

2017 Apr 21 18:00:26 Nexus5548B %ETHPORT-3-IF_ERROR_VLANS_SUSPENDED: VLANs on Interface Ethernet104/1/8 are being
suspended. (Reason: Vlan is not allowed on Peer-link)

interface port-channel4096

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

Nexus5548B# show int po4096 trunk

--------------------------------------------------------------------------------
Port Native Status Port
Vlan Channel
--------------------------------------------------------------------------------
Po4096 1 trunking --

--------------------------------------------------------------------------------
Port Vlans Allowed on Trunk
--------------------------------------------------------------------------------
Po4096 1-4094

--------------------------------------------------------------------------------
Port Vlans Err-disabled on Trunk
--------------------------------------------------------------------------------
Po4096 53

--------------------------------------------------------------------------------
Port STP Forwarding
--------------------------------------------------------------------------------
Po4096 1-2,6-7,9-11,17,20,30,33,35,50-51,201-204,206-209,300

--------------------------------------------------------------------------------
Port Vlans in spanning tree forwarding state and not pruned
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
Port Vlans Forwarding on FabricPath
--------------------------------------------------------------------------------

What I don't understand is how there is no restrictions on the numbers of port vlans allowed on trunk yet port vlan 53 is in err-disabled state.  

[Georg Pauwen]

Hello,

the command:

show vpc consistency-parameters global

should give you a listing of the allowed Vlans and the peer and local values.Peer and local values need to match, so you have to make sure that the Vlan 53 is listed in both.

Can you post the output of above command ?

[mike.mccollum1]

Vlan 53 does not seem to be listed in both

Nexus5548B# show vpc consistency-parameters global

 Legend:
 Type 1 : vPC will be suspended in case of mismatch

Name Type Local Value Peer Value
------------- ---- ---------------------- -----------------------
QoS 2 ([], [], [5], [], [], ([], [], [5], [], [],
 []) [])
Network QoS (MTU) 2 (9216, 0, 9216, 0, 0, (9216, 0, 9216, 0, 0,
 0) 0)
Network Qos (Pause) 2 (F, F, T, F, F, F) (F, F, T, F, F, F)
Input Queuing (Bandwidth) 2 (30, 0, 50, 0, 0, 0) (30, 0, 50, 0, 0, 0)
Input Queuing (Absolute 2 (F, F, F, F, F, F) (F, F, F, F, F, F)
Priority)
Output Queuing (Bandwidth) 2 (30, 0, 50, 0, 0, 0) (30, 0, 50, 0, 0, 0)
Output Queuing (Absolute 2 (F, F, F, F, F, F) (F, F, F, F, F, F)
Priority)
STP Mode 1 Rapid-PVST Rapid-PVST
STP Disabled 1 None None
STP MST Region Name 1 "" ""
STP MST Region Revision 1 0 0
STP MST Region Instance to 1
 VLAN Mapping
STP Loopguard 1 Disabled Disabled
STP Bridge Assurance 1 Enabled Enabled
STP Port Type, Edge 1 Normal, Disabled, Normal, Disabled,
BPDUFilter, Edge BPDUGuard Disabled Disabled
STP MST Simulate PVST 1 Enabled Enabled
IGMP Snooping Group-Limit 2 4000 4000
Interface-vlan admin up 2 2,6-7,9-11,17,20,30,33 2,6-7,9-11,17,20,30,33
 ,35,50-51,206,209,300 ,35,50-51,209,300
Interface-vlan routing 2 1-2,6-7,9-11,17,20,30, 1-2,6-7,9-11,17,20,30,
capability 33,35,50-51,206,209,30 33,35,50-51,209,300
 0
Allowed VLANs - 1-2,6-7,9-11,17,20,30, 1-2,6-7,9-11,17,20,30,
 33,35,50-51,53,201-204 33,35,50-51,201-204,20
 ,206-209,300 6-209,300
Local suspended VLANs - 53 -

[Georg Pauwen]

Hello,

can you post the port channel configs of both ends ?

[mike.mccollum1]

Thank you for responding and your time.  Here is the config of all port channels of both ends

Switch A
interface port-channel10
 description *** FABRIC A ***
 switchport mode trunk
 spanning-tree port type edge trunk
 speed 10000
 vpc 10

interface port-channel20
 description *** FABRIC B ***
 switchport mode trunk
 spanning-tree port type edge trunk
 speed 10000
 vpc 20

interface port-channel99
 description *** L3 Adjancancy to Switch 2 ***
 no switchport
 ip address 10.254.254.1/30
 ip router eigrp 99

interface port-channel101
 switchport mode fex-fabric
 fex associate 101
 vpc 101

interface port-channel102
 shutdown
 switchport mode fex-fabric
 fex associate 102
 vpc 102

interface port-channel103
 switchport mode fex-fabric
 fex associate 103
 vpc 103

interface port-channel104
 shutdown
 switchport mode fex-fabric
 fex associate 104
 vpc 104

interface port-channel105
 switchport mode fex-fabric
 fex associate 105
 vpc 105

interface port-channel4095
 no switchport
 speed 10000
 vrf member VPC-HEARTBEAT
 ip address 1.1.1.1/30

interface port-channel4096
 switchport mode trunk
 spanning-tree port type network
 speed 10000
 vpc peer-link


SwitchB

interface port-channel10
 description *** FABRIC A ***
 switchport mode trunk
 spanning-tree port type edge trunk
 speed 10000
 vpc 10

interface port-channel20
 description *** FABRIC B ***
 switchport mode trunk
 spanning-tree port type edge trunk
 speed 10000
 vpc 20

interface port-channel50
 description *** TRUNK to FOUNDRY ***
 switchport mode trunk
 switchport trunk native vlan 2
 spanning-tree port type normal
 speed 1000
 vpc 50

interface port-channel99
 description *** L3 Adjancancy to Switch 2 ***
 no switchport
 ip address 10.254.254.2/30
 ip router eigrp 99

interface port-channel101
 shutdown
 switchport mode fex-fabric
 fex associate 101
 vpc 101

interface port-channel102
 switchport mode fex-fabric
 fex associate 102
 vpc 102

interface port-channel103
 shutdown
 switchport mode fex-fabric
 fex associate 103
 vpc 103

interface port-channel104
 switchport mode fex-fabric
 fex associate 104
 vpc 104

interface port-channel105
 shutdown
 switchport mode fex-fabric
 fex associate 105
 vpc 105

interface port-channel4095
 no switchport
 speed 10000
 vrf member VPC-HEARTBEAT
 ip address 1.1.1.2/30

interface port-channel4096
 switchport mode trunk
 spanning-tree port type network
 speed 10000
 vpc peer-link