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[WLC] How to enable local VLAN advertisement from a network seed when there are more than one network seeds are configured

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Article ID: KB32181 KB Last Updated: 27 Nov 2017Version: 1.0
Summary:

Local controllers are unable to establish a tunnel with the VLAN that is available on network seed controller while another network seed is down.

Network topology:

Controller A
Controller B
Controller C
Controller D

Cluster:

Controller A & B are in a cluster
Controller C & D are in a cluster

Network domain:

Controller C & D are Network domain seeds with A & B as network domain member controllers.

When Controller C (network seed) is down, the controllers A and B are unable to establish a tunnel with a VLAN, which is available in Controller D (network member seed).

 
Solution:

In a network domain, when a WLC is configured as seed of a network domain, it is required to be configured as a member of its own network domain to make the seed share its available VLANs over the network domain members.

In the case of multiple seeds present over a network domain, the configuration must be associated with a higher affinity for its own seed-ip so that seeds join as member in its own domain as primary and shares its available VLANs to other network domain members.

Controller C & D should be added themselves as Network member seeds so that they can start advertising their local VLANs when Network seed is down.

Example Configuration

Controller C: 192.168.10.18
set mobility-domain mode seed domain-name JTAC-Guest
set mobility-domain member 192.168.10.26
set network-domain mode seed domain-name JTAC-NEDO
set network-domain peer 192.168.10.26
set network-domain mode member seed-ip 192.168.10.26

Controller D: 192.168.10.26
set mobility-domain mode secondary-seed domain-name JTAC-Guest seed-ip 192.168.10.18
set network-domain mode seed domain-name JTAC-NEDO
set network-domain peer 192.168.10.18
set network-domain mode member seed-ip 192.168.10.18

Controller A: 10.20.192.240
set mobility-domain mode seed domain-name JTAC-Guest-local
set mobility-domain member 10.22.192.240
set network-domain mode member seed-ip 192.168.10.26
set network-domain mode member seed-ip 192.168.10.18

Controller B: 10.21.10.240
set mobility-domain mode secondary-seed domain-name JTAC-Guest-local seed-ip 10.20.192.240
set network-domain mode member seed-ip 192.168.10.18
set network-domain mode member seed-ip 192.168.10.26
 

In order to enable network seeds to advertise their local VLANs, add them as member controllers of their own network domain:

set network-domain mode member seed-ip 143.216.48.18 affinity 10
set network-domain mode member seed-ip 143.216.48.26 affinity 10
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