Specifications

Advanced ESRP Features
ExtremeWare XOS 11.0 Concepts Guide 243
Other applications allow lower-cost redundant routing configurations because hosts can be directly
attached to the switch involved with ESRP. HA also requires at least one link between the master and
the slave ESRP switch for carrying traffic and to exchange ESRP hello packets.
ESRP domains that share ESRP HA ports must be members of different ESRP groups.
NOTE
Do not use the ESRP HA feature with the following protocols: STP, EAPS, or VRRP. A broadcast storm
may occur.
To configure a port to be a host port, use the following command:
configure esrp ports <ports> mode [host | normal]
ESRP Groups
ExtremeWare XOS supports running multiple instances of ESRP within the same VLAN or broadcast
domain. This functionality is called an ESRP group. Although other uses exist, the most typical
application for multiple ESRP groups is when two or more sets of ESRP switches are providing
fast-failover protection within a subnet. A maximum of seven distinct ESRP groups can be supported on
a single ESRP switch, and a maximum of seven ESRP groups can be defined within the same network
broadcast domain. You can configure a maximum of 32 ESRP groups in a network.
For example, two ESRP switches provide Layer 2/Layer 3 connectivity and redundancy for the subnet,
while another two ESRP switches provide Layer 2 connectivity and redundancy for a portion of the
same subnet. Figure 37 shows ESRP groups.
Figure 37: ESRP groups
An additional user for ESRP groups is ESRP HA, described on page 242.
EX_096
ESRP
Group1
Master
ESRP
Group1
Standby
ESRP
Group2
Master
(L2 only)
ESRP Group2 Standby
(L2 only)