3Com WX2200 3CRWX220095A Switch User Manual

Configuring Mobility
Domain Seed
You can optionally specify a secondary seed in a Mobility Domain. The
secondary seed provides redundancy for the primary seed switch in the
Mobility Domain. If the primary seed becomes unavailable, the secondary
seed assumes the role of the seed switch. This allows the Mobility
Domain to continue functioning if the primary seed becomes unavailable.
Specifying a secondary seed for a Mobility Domain is useful since it
eliminates the single point of failure that can occur if connectivity to the
seed switch is lost.
When the primary seed switch fails, the remaining members form a
Mobility Domain, with the secondary seed taking over as the primary
seed switch.
If countermeasures had been in effect on the primary seed, they are
stopped while the secondary seed gathers RF data from the member
switches. Once the secondary seed has rebuilt the RF database,
countermeasures can be restored.
VLAN tunnels (other than those between the member switches and
the primary seed) continue to operate normally.
Roaming and session statistics continue to be gathered, providing that
the primary seed is uninvolved with roaming.
When the primary seed is restored, it resumes its role as the primary seed
switch in the Mobility Domain. The secondary seed returns to its role as a
regular member of the Mobility Domain.
Use the following commands to configure a Mobility Domain consisting
of a primary seed, secondary seed, and one or more member switches:
On the primary seed:
set mobility-domain mode seed domain-name mob-domain-name
set mobility-domain member ip-addr
(for each member switch)
On the secondary seed:
set mobility-domain mode secondary-seed domain-name
mob-domain-name seed-ip primary-seed-ip-addr
set mobility-domain member ip-addr
(for each member switch)
On the other member switches in the Mobility Domain:
set mobility-domain mode member seed-ip primary-seed-ip-addr
set mobility-domain mode member secondary-seed-ip