configure vlan subvlan

configure vlan vlan_name [add | delete] subvlan sub_vlan_name


Adds or deletes a subVLAN to a superVLAN.

Syntax Description

vlan_name Specifies a superVLAN name.
add Adds the subVLAN to the superVLAN.
delete Deletes the subVLAN from the superVLAN.
sub_vlan_name Specifies a subVLAN name.



Usage Guidelines

The following properties apply to This command is available on the ExtremeSwitching X440-G2, X450-G2, X460-G2, X465, X590, X620, X670-G2, X690, X695, X870, 5320, 5420, 5520 series switches. aggregation operation:
  • All broadcast and unknown traffic remain local to the subVLAN and does not cross the subVLAN boundary. All traffic within the subVLAN are switched by the subVLAN, allowing traffic separation between subVLANs (while using the same default router address among the subVLANs).
  • Hosts can be located on the superVLAN or on subVLANs. Each host can assume any IP address within the address range of the superVLAN router interface. Hosts on the subVLAN are expected to have the same network mask as the superVLAN and have their default router set to the IP address of the superVLAN.
  • All IP unicast traffic between subVLANs is routed through the superVLAN. For example, no ICMP redirects are generated for traffic between subVLANs, because the superVLAN is responsible for subVLAN routing. Unicast IP traffic across the subVLANs is facilitated by the automatic addition of an ARP entry (similar to a proxy ARP entry) when a subVLAN is added to a superVLAN. This feature can be disabled for security purposes.


The following example adds the subVLAN "vsub1" to the superVLAN "vsuper":

configure vlan vsuper add subvlan vsub1


This command was first available in ExtremeXOS 12.1.

Platform Availability

This command is available on ExtremeSwitching X435, X440-G2, X450-G2, X460-G2, X465, X590, X620, X670-G2, X690, X695, X870, 5320, 5420, and 5520 series switches.