CISCO WIRELESS CONTROLLER REDUNDANCY OVER WAN

Objective :- Configuration of 2 Cisco Wireless controllers over WAN or Layer 3 Link.

Scenario :-  On the Core Switch, 3 Vlans have been created detailed as below

 

Configuration :- Configuration of 2 Cisco Wireless controllers to work over layer 3 or WAN Links.

 

WLC1 Primary:-

On the primary WLC , input the Backup controller IP (in this case 192.168.200.5) and controller name

WLC1 Primary:

Primary WLC output post configuring the  parameters :-

(WLC-Primary) >show interface summary

Number of Interfaces…………………….. 6

Interface Name                     Port       Vlan Id   IP Address           Type      Ap Mgr   Guest

——————————–   —-        ——–          —————         ——-         ——  —–

management                                  1        100               192.168.100.5    Static         Yes      No

redundancy-management       1         100              192.168.100.10  Static         No       No

redundancy-port                         –          untagged   169.254.100.10  Static         No       No

printer-vlan                                   1          199              10.10.199.100    Dynamic   No       No

service-port                                    N/A  N/A             0.0.0.0                  Static          No       No

 

 

(WLC-Primary) >show redundancy summary

Redundancy Mode = SSO DISABLED

Local State = ACTIVE

Peer State = N/A

Unit = Primary

Unit ID = AA:BB:CC:DD:EE:FF

Redundancy State = N/A

Mobility MAC = AA:BB:CC:DD:EE:FF

 

Redundancy Management IP Address…………….. 192.168.100.10

Peer Redundancy Management IP Address………… 192.168.100.11

Redundancy Port IP Address………………….. 169.254.100.10

Peer Redundancy Port IP Address……………… 169.254.100.11

 

(WLC-Primary) >show advanced backup-controller

AP primary Backup Controller ……………….. WLC-Secondary 192.168.200.5

AP secondary Backup Controller ………………

 

 

WLC2 Secondary:

Backup WLC output post configuring the  parameters :-

(WLC-Secondary) >show interface summary

 

Number of Interfaces…………………….. 6

Interface Name                       Port       Vlan Id    IP Address           Type      Ap Mgr   Guest

——————————–    —-       ——–     —————           ——-       ——   —–

management                                 1           200        192.168.200.5      Static       Yes      No

redundancy-management       1           200        192.168.200.10   Static       No       No

redundancy-port                         –        untagged  169.254.200.10  Static       No       No

printer-vlan                                   1           199          10.10.199.100     Dynamic No       No

service-port                                N/A        N/A       0.0.0.0                    Static        No       No

virtual                                            N/A        N/A       1.1.1.1                      Static         No       No

 

 

(WLC-Secondary) >show redundancy summary

Redundancy Mode = SSO DISABLED

Local State = ACTIVE

Peer State = N/A

Unit = Secondary – HA SKU

Unit ID = GG:HH:II:JJ:KK:LL

Redundancy State = N/A

Mobility MAC = GG:HH:II:JJ:KK:LL

 

Redundancy Management IP Address…………….. 192.168.200.10

Peer Redundancy Management IP Address………… 192.168.200.11

Redundancy Port IP Address………………….. 169.254.200.10

Peer Redundancy Port IP Address……………… 169.254.200.11

 

 

 

(WLC-Secondary) >show advanced backup-controller

AP primary Backup Controller ………………..  0.0.0.0

AP secondary Backup Controller ………………

 

 

L3 Switch Configuration :

L3-SWITCH1#show cdp neighbors

 

Device ID                Local Interface     Hold time    Capability    Platform         Port ID

WLC-Secondary  Gig 1/0/1                 152                  H                    AIR-CT550   Gig 0/0/1

TEST-AP-1            Gig 1/0/7                 142                 R T                AIR-CAP12   Gig 0.1

WLC-Primary       Gig 1/0/3                 140                 H                    AIR-CT550   Gig 0/0/1

 

 

L3-SWITCH1#show runn

!

interface GigabitEthernet1/0/1

Switchport access vlan 200

Switchport mode access

!

interface GigabitEthernet1/0/3

Switchport access vlan 100

Switchport mode access

end

!

interface GigabitEthernet1/0/7

switchport access vlan 300

switchport mode access

end

 

Testing:

========

APs configured with dhcp option 43 to join the Primary WLC (192.168.100.5).

Once the APs join the Primary WLC , under high availability configure the Primary and the Secondary WLCs with IP address.

 

Make sure you have configured n the primary WLC the details of Backup Primary Controller:

 

APs initially were on the Primary WLC :

 

Once the connectivity to the Primary WLC is lost (We shut down the port to the Primary-WLC on the Switch). We find the APs automatically falling back to the Secondary.

 

AP-SWITCH1(config)#int gig 1/0/3

AP-SWITCH1(config-if)#shut

AP-SWITCH1(config-if)#

1w1d: %LINK-5-CHANGED: Interface GigabitEthernet1/0/3, changed state to administratively down

1w1d: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/3, changed state to down

 

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