Mobility Test between Controllers

In this post we will test the mobility ping between 2 controllers.

You can check here : How to Configure Mobility on WLC

Controllers in a mobility list communicate with each other by controlling information over a well-known UDP port and exchanging data traffic through an Ethernet-over-IP (EoIP) tunnel. Because UDP and EoIP are not reliable transport mechanisms, there is no guarantee that a mobility control packet or data packet will be delivered to a mobility peer. Mobility packets may be lost in transit due to a firewall filtering the UDP port or EoIP packets or due to routing issues.

We can test the mobility communication environment by performing mobility ping tests. These tests may be used to validate connectivity between members of a mobility group.

Two are two types of ping test:

Mobility ping over UDP: This test runs over mobility UDP port 16666. It tests whether the mobility control packet can be reached over the management interface.

Mobility ping over EoIP: This test runs over EoIP(Port 97). It tests the mobility data traffic over the management interface.

*** Only one mobility ping test per controller can be run at a given time.

These ping tests are not Internet Control Message Protocol (ICMP) based. The term “ping” is used to indicate an echo request and an echo reply message.

Check which WLCs are in mobility list:

(WLC1) >show mobility summary
 Symmetric Mobility Tunneling (current) .......... Enabled
 Symmetric Mobility Tunneling (after reboot) ..... Enabled
 Mobility Protocol Port........................... 16666
 Default Mobility Domain.......................... Test
 Multicast Mode .................................. Disabled
 Mobility Domain ID for 802.11r................... 0x840e
 Mobility Keepalive Interval...................... 10
 Mobility Keepalive Count......................... 3
 Mobility Group Members Configured................ 2
 Mobility Control Message DSCP Value.............. 0
 Controllers configured in the Mobility Group
 MAC Address        IP Address       Group Name                        Multicast IP     Status
 00:21:d8:fa:66:00  192.168.80.1       Test                              0.0.0.0          Up
 00:21:d8:fa:fd:a0  192.168.82.1       Test                              0.0.0.0          Up

 

To test the mobility UDP control packet communication between two controllers, enter this command: mping mobility_peer_IP_address

(WLC1) >mping 192.168.82.1
 Send count=3, Receive count=3 from 192.168.82.1
(WLC1) >

To test the mobility EoIP data packet communication between two controllers, enter this command: eping mobility_peer_IP_address

(WLC1) >eping 192.168.82.1
 Send count=3, Receive count=3 from 192.168.82.1
(WLC1) >

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