Controller Based WLANs

Why does Wired uplink not move to Cellular when uplink vlan's operstate is enabled ?

by ‎07-25-2016 11:49 AM - edited ‎07-25-2016 11:49 AM
Q:

Why does Wired uplink not move to Cellular when uplink-vlan's operstate is enabled ?



A:

This is expected behavior. when the Operstate is UP, as the VLAN does not go DOWN, the Uplink manager does not receive the Event to get the Uplink toggled. Thus shutting down uplink port  won't toggle the Uplink as the uplink- VLAN's Operstate still being UP.


Tried it in lab setup and it is working as expected (below):

(controller) (config-if)#show vlan

VLAN CONFIGURATION
------------------
VLAN  Description  Ports                       AAA Profile
----  -----------  -----                       -----------
1     Default      GE0/0/1 GE0/0/2-0/5 Pc0-7   N/A 
33    VLAN0033     GE0/0/0                     N/A 
46    VLAN0046                                 N/A 
99    VLAN0099                                 N/A 

(controller) (config) #interface vlan 33
(controller) (config-subif)#operstate up
(controller) (config-subif)#write m
Saving Configuration...

Configuration Saved.

(controller) (config-subif)#!
(controller) (config) #interface gigabitethernet 0/0/0      ----->>>>> uplink port
(controller) (config-if)#shutdown 
(controller) (config-if)#show ip interface b

Interface                   IP Address / IP Netmask        Admin   Protocol
vlan 46                        5.6.6.7 / 255.255.255.0     up      up  
vlan 1                     172.168.2.1 / 255.255.255.0     up      down
vlan 33                    10.16.33.73 / 255.255.255.0     up      up  


===============================================================================

(controller) (config-if)#interface vlan 33
(controller) (config-subif)#no operstate up
(controller) (config-subif)#write m
Saving Configuration...

Configuration Saved.

(controller) (config-subif)#interface gigabitethernet 0/0/0
(controller) (config-if)#shutdown 
(controller) (config-if)#write m
Saving Configuration...

Configuration Saved.

(controller) (config-if)#show ip interface brief 

Interface                   IP Address / IP Netmask        Admin   Protocol
vlan 46                        5.6.6.7 / 255.255.255.0     up      up  
vlan 1                     172.168.2.1 / 255.255.255.0     up      down
vlan 33                    10.16.33.73 / 255.255.255.0     up      down


Also Note:

If the controller-ip vlan is configured as uplink vlan, then this is expected behavior. The port which has controller-ip vlan mapped to it will never go down for any reason.
Hence the Uplink manager never gets to know that the vlan is down (hence doesn't switch to cellular).

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