R2511-HP MSR Router Series Layer 2 - LAN Switching Configuration Guide(V5)

Configuring super VLANs

Feature and hardware compatibility

Feature

MSR90

MSR93X

MSR20-1

MSR20 MSR30 MSR50

MSR1

000

Configuring super

VLAN

No No No No

Available only

on fixed Layer

2 Ethernet

interfaces of

MSR30-11E

and

MSR30-11F

routers and on

MSR30-10

routers

installed with

XMIM Layer 2

switching

modules

No No

Overview

Super VLAN, also called "VLAN aggregation," was introduced to save IP address space.

A super VLAN is associated with multiple sub-VLANs. You can create a VLAN interface for a super VLAN

and assign an IP address for the VLAN interface. However, you cannot create a VLAN interface for a

sub-VLAN. You can assign a physical port to a sub-VLAN, but not to a super VLAN. All ports of a

sub-VLAN use the VLAN interface IP address of the associated super VLAN. Packets cannot be

forwarded between sub-VLANs at Layer 2.

To enable Layer 3 communication between sub-VLANs, create a super VLAN and the VLAN interface,

and enable local proxy ARP or local proxy ND on the VLAN interface, depending on the VLAN interface

IP address type (IPv4 or IPv6), as follows:

• In an IPv4 network, enable local proxy ARP on the VLAN interface, so that the super VLAN can

forward and process ARP requests and replies.

• In an IPv6 network, enable local proxy ND on the VLAN interface, so that the super VLAN can

forward and process the NS messages and NA messages.

Configuration task list

To configure a super VLAN, complete the following tasks:

1. Configure sub-VLANs.

2. Configure a super VLAN, and associate the super VLAN with the sub-VLANs configured earlier.

3. Configure a VLAN interface for the super VLAN. The VLAN interface enables communication

among hosts and sub-VLANs.