Huawei quidway s7700 - Configuring VLAN Aggregation to Save IP Addresses; Establishing the Configuration Task

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Procedure

type interface-number | -m time | -n | -p pattern | -q | -r | -s packetsize | -system-time | -t

timeout | -tos tos-value | -v | -vpn-instance vpn-instance-name ]

host command to check

whether users in different VLANs can communicate with each other.

If the ping fails, you can run the following commands to locate the fault:

– Run the display vlan [ vlan-id [ verbose ] ] command to check information about all

VLANs or a specified VLAN.

– Run the display interface vlanif [ vlan-id ] command to check information about

VLANIF interfaces.

Before running this command, ensure that VLANIF interfaces have been configured.

– Run the display vlan-switch [ vlan-switch-name | interface interface-type interface-

number ] command to check the configuration of VLAN Switch.

Before running this command, ensure that VLAN Switch has been configured.

----End

3.6 Configuring VLAN Aggregation to Save IP Addresses

VLAN aggregation prevents the waste of IP addresses and implements inter-VLAN

communication.

3.6.1 Establishing the Configuration Task

Before configuring VLAN aggregation, familiarize yourself with the applicable environment,

complete the pre-configuration tasks, and obtain the data required for the configuration. This

will help you complete the configuration task quickly and accurately.

Applicable Environment

As networks expand, address resources become insufficient. VLAN aggregation is developed

to save IP addresses.

In VLAN aggregation, one super-VLAN is associated with multiple sub-VLANs. Physical ports

cannot join a super-VLAN but a VLANIF interface can be created for the super-VLAN and an

IP address can be assigned to the VLANIF interface. Physical ports can join a sub-VLAN but

no VLANIF interface can be created for the sub-VLAN. All the ports in the sub-VLAN use the

same IP address with the VLANIF interface of the super-VLAN. This saves subnet IDs, default

gateway addresses of the subnets, and directed broadcast addresses of the subnets. In addition,

different broadcast domains can use the addresses in the same subnet segment. As a result, subnet

differences are eliminated, addressing becomes flexible, and the number of idle addresses is

reduced. VLAN aggregation allows each sub-VLAN to function as a broadcast domain and

reduces the waste of IP addresses to be assigned to ordinary VLANs.

Figure 3-6 shows the typical VLAN aggregation networking.

Quidway S7700 Smart Routing Switch

Configuration Guide - Ethernet 3 VLAN Configuration

Issue 01 (2011-07-15) Huawei Proprietary and Confidential

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