Cisco router VLAN configuration (1)

This article describes in detail the detailed steps and procedures of VLAN division, and tells readers a complete configuration process through a specific instance.

Virtual LAN (VLAN)

Currently, the backbone network technology we use when constructing an enterprise network is generally based on exchange and virtual networks. The exchange technology changes shared media to exclusive media, greatly improving the network speed. The Virtual Network Technology breaks the restrictions of the geographical environment. without changing the physical connection of the network, the workstation can be moved between Working Groups or subnets, And the workstation can form a logical Working Group or virtual subnet, improve the operation performance of information systems, balance network data traffic, and make rational use of hardware and information resources. At the same time, the use of virtual network technology, greatly reduce the burden of network management and maintenance work, reduce network maintenance costs. With the application of the virtual network technology, the question of how to communicate between virtual networks is inevitable.

ISL protocol between switches

The ISL (Interior Switching Link) protocol is used to implement VLAN relay between switches. It is an information packet marking protocol. Frames sent on ISL interfaces are composed of a standard Ethernet frame and related VLAN information. As shown in, data from different VLANs can be transmitted on interfaces that support ISL.

Virtual lan vlan) routing instance

The device uses the ipvst5500 switch 1, the installation of WS-X5530-E3 Management Engine, multiple WS-X5225R and WS-X5302 Routing Switching Module, The WS-X5302 is directly inserted into the switch, through two channels and the VLAN on the system back board connected, from the user's point of view, it is regarded as a one-interface module, which supports ISL. There are three virtual networks in the vswitch, respectively named default, qbw, rgw, virtual network routing through WS-X5302.
Set system name 5500C is the command to be set.

The settings are as follows:
Catalyst 5500 Configuration:

Begin
Set password $1 $ FMFQ $ HfZR5DUszVHIRhrz4h6V70
Set enablepass $1 $ FMFQ $ HfZR5DUszVHIRhrz4h6V70
Set prompt Console>
Set length 24 default
Set logout 20
Set banner motd ^ C
!
# System
Set system baud 9600
Set system modem disable
Set system name 5500C
Set system location
Set system contact
!
# Ip
Set interface sc0 1 10.230.4.240 255.255.255.0 10.230.4.255

Set interface sc0 up
Set interface sl0 0.0.0.0 0.0.0.0
Set interface sl0 up
Set arp agingtime 1200
Set ip redirect enable
Set ip unreachable enable
Set ip fragmentation enable
Set ip route 0.0.0.0 10.230.4.15 1
Set ip alias default 0.0.0.0
!
# Command alias
!
# Vtp
Set vtp domain hne
Set vtp mode server
Set vtp v2 disable
Set vtp pruning disable
Set vtp pruneeligible 2-1000
Clear vtp pruneeligible 1001-1005
Set vlan 1 name default type ethernet mtu 1500 said 100001 state active
Set vlan 777 name rgw type ethernet mtu 1500 said 100777 state active
Set vlan 888 name qbw type ethernet mtu 1500 said 100888 state active
Set vlan 1002 name fddi-default type fddi mtu 1500 said 101002 state active
Set vlan 1004 name fddinet-default type fddinet mtu 1500 said 101004 state active bridge 0x0 stp ieee
Set vlan 1005 name trnet-default type trbrf mtu 1500 said 101005 state active bridge 0x0 stp IBM
Set vlan 1003 name token-ring-default type trcrf mtu 1500 said 101003 state active parent 0 ring 0x0 mode rbaremaxhop 7 stemaxhop 7
!
# Set boot command
Set boot config-register 0x102
Set boot system flash bootflash: cat5000-sup3.4-3-1a.bin
!