Configuring Ip Multinetting; Ip Multinetting Examples - Extreme Networks ExtremeWare XOS Guide Manual

It is possible for a VRRP VR to have additional virtual IP addresses assigned to it. In this case, the
following conditions must be met:
Multiple virtual IP addresses for the same VRID must be on the same subnet.
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Multiple virtual IP addresses must all not be owned by the switch.
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Assuming a VLAN v1 that has IP addresses 1.1.1.1/24 and 2.2.2.2/24, here are some more examples of
valid configurations:
VRRP VR on v1 with VRID of 99 with virtual IP addresses of 1.1.1.2 and 1.1.1.3
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VRRP VR on v1 with VRID of 100 with virtual IP addresses of 2.2.2.3 and 2.2.2.4
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VRRP VR on v1 with VRID of 99 with virtual IP addresses of 1.1.1.98 and 1.1.1.99
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VRRP VR on v1 with VRID of 100 with virtual IP addresses of 2.2.2.98 and 2.2.2.99
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Given the same VLAN v1 as above, here are some invalid configurations:
VRRP VR on v1 with VRID of 99 with virtual IP addresses of 1.1.1.1 and 2.2.2.2 (the virtual IP
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addresses are not on the same subnet)
VRRP VR on v1 with VRID of 100 with virtual IP addresses of 2.2.2.2 and 1.1.1.1 (the virtual IP
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addresses are not on the same subnet)
VRRP VR on v1 with VRID of 99 with virtual IP addresses of 1.1.1.1 and 1.1.1.99 (one virtual IP
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address is owned by the switch and one is not)
VRRP VR on v1 with VRID of 100 with virtual IP addresses of 2.2.2.2 and 2.2.2.99 (one virtual IP
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address is owned by the switch and one is not).

Configuring IP Multinetting

You configure IP multinetting by adding a secondary IP address to a vlan. Use the following command
to add a secondary IP address:
configure vlan <vlan_name> add secondary-ipaddress [<ipaddress> {<netmask>} |
<ipNetmask>]
Once you have added a secondary IP address, you cannot change the primary IP address of a VLAN
until you first delete all the secondary IP addresses. Use the following command to delete secondary IP
addresses:
configure vlan <vlan_name> delete secondary-ipaddress [<ipaddress> | all]

IP Multinetting Examples

The following example configures a switch to have one multinetted segment (port 5:5) that contains
three subnets (192.168.34.0/24, 192.168.35.0/24, and 192.168.37.0/24).
configure default delete port 5:5
create vlan multinet
configure multinet ipaddress 192.168.34.1/24
configure multinet add secondary-ipaddress 192.168.35.1/24
configure multinet add secondary-ipaddress 192.168.37.1/24
configure multinet add port 5:5
enable ipforwarding
The following example configures a switch to have one multinetted segment (port 5:5) that contains
three subnets (192.168.34.0, 192.168.35.0, and 192.168.37.0). It also configures a second multinetted
ExtremeWare XOS 11.1 Concepts Guide
IP Multinetting
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