Extreme Networks ExtremeWare 7.5, Command Reference Manual

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1622 ExtremeWare 7.5 Command Reference Guide
IP Unicast Commands
configure vlan secondary-ip
configure vlan <super-vlan name> [add | delete] secondary-ip <ip address>
{<mask>}
Description
Adds or deletes a secondary IP address to the super-VLAN for responding to ICMP ping requests.
Syntax Description
Default
N/A
Usage Guidelines
• All broadcast and unknown traffic remains local to the sub-VLAN and does not cross the sub-VLAN
boundary. All traffic within the sub-VLAN is switched by the sub-VLAN, allowing traffic separation
between sub-VLANs (while using the same default router address among the sub-VLANs).
• Hosts are located on the sub-VLAN. Each host can assume any IP address within the address range
of the super-VLAN router interface. Hosts on the sub-VLAN are expected to have the same network
mask as the super-VLAN and have their default router set to the IP address or the super-VLAN.
• All traffic (IP unicast and IP multicast) between sub-VLANs is routed through the super-VLAN. For
example, no ICMP redirects are generated for traffic between sub-VLANs, because the super-VLAN
is responsible for sub-VLAN routing. Unicast IP traffic across the sub-VLANs is facilitated by the
automatic addition of an ARP entry (similar to a proxy ARP entry) when a sub-VLAN is added to a
super-VLAN. This feature can be disabled for security purposes.
IP multicast traffic between sub-VLANs is routed when an IP multicast routing protocol is enabled on
the super-VLAN.
Example
The following command adds a secondary IP address to the super-VLAN vsuper for responding to
ICMP ping requests:
configure vlan vsuper add secondary-ip 10.1.1.1
History
This command was first available in ExtremeWare 6.1.
super-vlan name Specifies a super-VLAN name.
add Specifies to add a secondary IP address.
delete Specifies to delete a secondary IP address.
ip address Specifies an IP address.
mask Specifies a netmask.