A communicated parameter change
Loss of communication between primary and secondary
If a parameter determines the primary changes (for example, link loss or priority change), the election of the new primary typically occurs within one second. A parameter change triggers a handshake between the routers. As long as both routers agree upon the state transition, new primary election is immediate.
If a switch in secondary mode loses its connection with the primary, a new election occurs (using the same precedence order indicated ESRP Master Election or using a configured precedence order described in ESRP Election Algorithms). The new election typically takes place in three times the defined timer cycle (8 seconds by default).
Before the switch transitions to the primary state, it enters a temporary pre-primary state. While in the pre-primary state, the switch sends ESRP PDUs until the pre-primary state timeout expires. Depending upon the election algorithm, the switch may then enter the primary or secondary state. Traffic is unaffected by the pre-primary state because the primary continues to operate normally. The pre-primary state avoids the possibility of having simultaneous primaries.
To configure the pre-primary state timeout, use the following command:
configure esrp esrpDomain timer premaster seconds
Caution
Configure the pre-primary state timeout only with guidance from Extreme Networks support. Misconfiguration can severely degrade the performance of ESRP and your switch.