HPE FlexFabric 5940 SERIES Configuration Guide

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Configuring super VLANs
Hosts in a VLAN typically use IP addresses in the same subnet. For Layer 3 interoperability with
other VLANs, you can create a VLAN interface for the VLAN and assign an IP address to it. This
requires a large number of IP addresses.
The super VLAN feature was introduced to save IP addresses. A super VLAN is associated with
multiple sub-VLANs. These sub-VLANs use the VLAN interface of the super VLAN (also known as a
super VLAN interface) as the gateway for Layer 3 communication.
You can create a VLAN interface for a super VLAN and assign an IP address to it. However, you
cannot create a VLAN interface for a sub-VLAN. You can assign a physical port to a sub-VLAN, but
you cannot assign a physical port to a super VLAN. Sub-VLANs are isolated at Layer 2.
To enable Layer 3 communication between sub-VLANs, perform the following tasks:
1. Create a super VLAN and the VLAN interface for the super VLAN.
2. Enable local proxy ARP or ND on the super VLAN interface as follows:
{ In an IPv4 network, enable local proxy ARP on the super VLAN interface. The super VLAN
can then process ARP requests and replies sent from the sub-VLANs.
{ In an IPv6 network, enable local proxy ND on the super VLAN interface. The super VLAN
can then process the NS and NA messages sent from the sub-VLANs.
Super VLAN configuration task list
Tasks at a glance
(Required.) Creating a sub-VLAN
(Required.) Configuring a super VLAN
(Required.) Configuring a super VLAN interface
Creating a sub-VLAN
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Create a sub-VLAN.
vlan
vlan-id
By default, only the system default VLAN
(VLAN 1) exists.
Configuring a super VLAN
When you configure a super VLAN, follow these restrictions and guidelines:
• Do not configure the VLAN of a MAC address-to-VLAN entry as a super VLAN.
• Do not configure a VLAN as both a super VLAN and a guest VLAN, Auth-Fail VLAN, or critical
VLAN. For more information about guest VLANs, Auth-Fail VLANs, and critical VLANs, see
Security Configuration Guide.
• Do not configure a VLAN as both a super VLAN and a sub-VLAN.
• Layer 2 multicast configuration for super VLANs does not take effect because they do not have
physical ports.

HPE FlexFabric 5940 SERIES Specifications

General

Brand	HPE
Model	FlexFabric 5940 SERIES
Category	Switch
Language	English