Extreme Networks ExtremeWare XOS Command Reference Manual page 1004

ESRP Commands
sticky > track > ports > priority
track > ports > priority
track > ports > priority > mac
Default
In extended mode, the default election algorithm is
.
> mac
In standard mode, the default election algorithm is
Usage Guidelines
The election algorithm determines the order of precedence of the election factors used to determine the
ESRP Master. The election factors are:
Stickiness (
●
domain claims master, its sticky value is set to 1 (available in extended mode only).
Active Ports (
●
Tracking Information (
●
has priority.
ESRP Priority (
●
higher priority. The default priority setting is 0. A priority setting of 255 makes an ESRP switch a
standby switch that remains in slave mode until you change the priority setting. Extreme Networks
recommends this setting for system maintenance. A switch with a priority setting of 255 will never
become the master.
MAC address (
●
Active port weight (
●
bandwidth of the port automatically determines the port weight (available only in extended mode).
ESRP does not count ports with a weight of 0 (known as don't count ports) regardless of ESRP
running in extended or standard mode.
The election algorithm must be the same on all switches for a particular ESRP domain. The election
algorithms that use sticky are and weight are available in extended mode only.
In ExtremeWare XOS 11.0, the extended mode default election algorithm is:
> priority > mac > weight.
Factors to Consider. The
ensure that there is no failback if the original Master recovers (the Master will have the same ports,
tracks and priority, but a higher MAC).
Any of the options with sticky can also be used to ensure that there is no failback if the original master
recovers. With sticky, if an event causes the ESRP master to failover, ESRP assigns the new master with
the sticky count of 1. After sticky is set on the master, regardless of changes to its neighbor's election
algorithm, the new master retains its position. For example, adding active ports to the slave does not
cause the new master to failback to the original master, even if the slave has more active ports than the
master. Sticky algorithms provide for fewer network interruptions than non-sticky algorithms. Sticky is
set on the master switch only.
1004
Specifies that this ESRP domain should consider election factors in the
following order: Stickiness, tracking information, active ports, ESRP priority.
Specifies that this ESRP domain should consider election factors in the
following order: Tracking information, active ports, ESRP priority.
Specifies that this ESRP domain should consider election factors in the
following order: Tracking information, active ports, ESRP priority, MAC address.
): the switch with the higher sticky value has higher priority. When an ESRP
sticky
): the number of active ports (the switch with the highest number takes priority)
ports
): whether the switch is using ESRP tracking. A switch using tracking
track
): a user-defined priority number between 0 and 254. A higher number has
priority
): the switch MAC address. A higher-number address has priority.
mac
)—The switch that has the highest port weight takes precedence. The
weight
This election algorithm is not supported in ExtremeWare XOS 11.1.
ports-track-priority
sticky > ports > weight > track > priority
ports > track > priority > mac
or
track-ports-priority
ExtremeWare XOS 11.3 Command Reference
.
sticky > ports > track
options can be used to