User guide

E
XTREME
W
ARE
S
OFTWARE
U
SER
G
UIDE
10-13
ESRP
AND
VLAN
AGGREGATION
ESRP
AND
VLAN
AGGREGATION
ESRP can be used to provide redundant default router protection to VLAN aggregation
clients. ESRP is enabled on the super-VLAN only (not the sub-VLANs). The procedure is
to add ports to the super-VLAN that is shared with the sub VLANs. To do so, the
super-VLAN should be configured with an 802.1Q tag, and added as tagged with the
sub-VLAN ports to avoid a protocol conflict. Lastly, enable ESRP on the super-VLAN.
For more information on VLAN aggregation, see Chapter 6.
The following example combines ESRP and VLAN aggregation for the super-VLAN
vsuper and two sub-VLANs, v1sub and v2sub, that have ports 1 and 2 as members,
respectively.
1 Create the VLANs and setup the super to sub-VLAN relationship
create vlan v1sub
create vlan v2sub
create vlan vsuper
config vsuper ipaddress 10.1.2.3/24
enable ipforwarding
enable ospf
config ospf add vsuper
config v1sub add port 1
config v2sub add port 2
config vsuper add subvlan v1sub
config vsuper add subvlan v2sub
2 Turn on ESRP for the VLAN vsuper.
config vsuper tag 1234
config vsuper add port 1,2 tagged
enable esrp vlan vsuper
Use these commands to verify the configuration:
•
show vlan {detail}
— Displays super- and sub-VLAN relationships, IP addresses,
and port membership.
•
show esrp {detail}
—Verifies ESRP is enabled and operational.