Extreme Networks ExtremeWare XOS 11.1, Manual

Page: 377 / 496

IP Multinetting
ExtremeWare XOS 11.1 Concepts Guide
377
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.
●
Multiple virtual IP addresses must all not be owned by the switch.
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
●
VRRP VR on v1 with VRID of 100 with virtual IP addresses of 2.2.2.3 and 2.2.2.4
●
VRRP VR on v1 with VRID of 99 with virtual IP addresses of 1.1.1.98 and 1.1.1.99
●
VRRP VR on v1 with VRID of 100 with virtual IP addresses of 2.2.2.98 and 2.2.2.99
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
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
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
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
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