To participate in ESRP (Extreme Standby Router Protocol), the following must be true:
A VLAN (Virtual LAN) can belong to only one ESRP domain.
The IP address for the VLANs participating in an ESRP domain must be identical.
For operation over IPv6, both an IPv6 and an IPv4 address must be present on the master VLAN for every participating router.
All switches in the ESRP network must use the same election algorithm, otherwise loss of connectivity, broadcast storms, or other unpredictable behavior may occur.
If you have an untagged master VLAN, you must specify an ESRP domain ID. The domain ID must be identical on all switches participating in ESRP for that particular domain.
If you have a tagged master VLAN, ESRP uses the 802.1Q tag (VLANid) of the master VLAN for the ESRP domain ID. If you do not use the VLANid as the domain ID, you must specify a different domain ID. As previously described, the domain ID must be identical on all switches participating in ESRP for that particular domain.
Note
If you configure the OSPF (Open Shortest Path First) routing protocol and ESRP, you must manually configure an OSPF router identifier. Be sure that you configure a unique OSPF router ID on each switch running ESRP. For more information, see OSPF
We recommend that all switches participating in ESRP run the same version of ExtremeXOS software.
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