with each other only at Layer 2, not Layer 3. These PCs are isolated from each other at Layer
2. Consequently, PCs in different sub-VLANs cannot communicate with each other.
Proxy ARP is required to enable PCs in a sub-VLAN to communicate with PCs in another sub-
VLAN or PCs on other networks. After a super-VLAN and its VLANIF interface are created,
proxy ARP must be enabled to allow the super-VLAN to forward or process ARP request and
reply packets. Proxy ARP helps PCs in sub-VLANs communicate with each other at the network
layer.
NOTE
An IP address must have been assigned to the VLANIF interface corresponding to the super-VLAN.
Otherwise, proxy ARP cannot take effect.
VLAN aggregation simplifies configurations for the network where many VLANs are
configured and PCs in different VLANs need to communicate with each other.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface vlanif vlan-id
The view of the VLANIF interface of the super-VLAN is displayed.
Step 3 Run:
arp-proxy inter-sub-vlan-proxy enable
Inter-sub-VLAN proxy ARP is enabled.
----End
3.6.6 Checking the Configuration
After VLAN aggregation is configured, you can view VLAN types and information about
VLANIF interfaces, such as the physical status, link protocol status, IP address, and mask.
Prerequisite
The VLAN aggregation configurations are complete.
Procedure
l Run the display vlan [ vlan-id [ verbose ] ] command to check VLAN information.
l Run the display interface vlanif [ vlan-id ] command to check information about a specific
VLANIF interface.
----End
3.7 Configuring a MUX VLAN to Separate Layer 2 Traffic
Configuring a MUX VLAN allows users in different VLANs to communicate with each other,
and separates users in a certain VLAN.
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 3 VLAN Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
100
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