Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 
New Member

Wireless Controller connectivity to Nexus 2k

I recently moved a 4402 Wireless LAN Controller off of a 6509  connection and onto a Nexus 2k connection. The config on the 6509 for  the WLC was as follows:

interface GigabitEthernet2/2/32

description ESC-WLC-1 Wireless LAN Controller


switchport trunk encapsulation dot1q

switchport mode trunk

mls qos trust cos

spanning-tree portfast edge trunk

When I configured the 2k FEX for connectivity, I entered the following comparable config:

int e101/1/23

description ESC-WLC-1 Wireless LAN Controller

switchport mode trunk

spanning-tree port type edge trunk

I  was not able to get connectivity to the WLC. The WLC was set to trunk  and the interface was up, but even when I issued a show vpc consistency  parameters on that interface and all looked good, no connectivity.

Here are some of my log captures:

2011 Nov 11  07:39:24 ESC-NX5010-1 %ETHPORT-3-IF_ERROR_VLANS_SUSPENDED: VLANs  1-5,10,51,100-112,120,155,201-202,251-252,255,302,307,310,320,1109 on  Interface Ethernet101/1/23 are being suspended. (Reason: Co

mpatibility check failed for port mode)

2011 Nov 11 07:39:24 ESC-NX5010-1 %ETHPORT-5-IF_UP: Interface Ethernet101/1/23 is up in mode trunk

2011 Nov 11 07:46:22 ESC-NX5010-1 %VSHD-5-VSHD_SYSLOG_CONFIG_I: Configured from vty by admin on

Does anyone know if there is anything special on the Wireless LAN Controller that needs to be configured?

Thank you,

Bobby Grewal

New Member

Wireless Controller connectivity to Nexus 2k

We had a similiar issue between our 6509 and our Nexus 5010.  Turned out to be an issue with pruning on our Port Channel. 

do a sh run int trunk and check vlan prunning.

Good day

CreatePlease to create content