Wireless/Redundant Edge Services xl Module Management and Configuration Guide WS.02.xx and greater

10-6
Redundancy Groups
High Availability for Wireless Services
Adopting RPs in Standby Mode
In standby mode, a redundancy group member adopts RPs only in certain
circumstances:
■ The standby member does not receive a heartbeat from an active member
for the length of time specified in the hold period option.
In a group with multiple active members, the standby member takes
action should even one member fail.
■ All active members fail to adopt an RP, although the group has enough RP
licenses to adopt the RP.
Table 10-1 describes some of these situations.
Table 10-1. Situations in Which a Standby Member Adopts RPs
If the active member becomes unavailable and a standby member adopts its
RPs, the standby member continues to support these RPs even after the active
member becomes available again, which maintains continuity of service. You
can, however, manually revert the standby member to force it to return the
RPs to the active member.
RP Licensing for Redundancy Groups
The sections above described the circumstances in which a member of a
redundancy group can adopt an RP. A final condition for adopting an RP is that
the group have sufficient licenses. (See “Radio Port Licenses” on page 2-123 of
Chapter 2: Configuring the ProCurve Wireless Edge Services xl Module.)
Situation Possible Causes
A standby member misses
heartbeats from an active member.
• The active member has failed.
• The wireless services-enabled switch in which the
active member is installed has failed.
• A failed network connection has isolated the
wireless services-enabled switch from the network.
Active modules fail to adopt an RP. • Active members’ internal downlink ports have not
been tagged for the RP VLAN.
• Active members’ are explicitly prohibited from
adopting the RP.