How does a Cisco router set up a bridge instance?

Some time ago, someone familiar with me asked me how to set up a bridge on a Cisco router )? At that time, due to the relationship between work, I just briefly talked to him. Today, we set up a Cisco router as a complete configuration command for bridging. Through this instance, you can learn how to use a router to concatenate several networks.

The concept of Bridging refers to the process of forwarding network packets based on the link layer address of the OSI network model. It works on the second layer of osi. A general switch, the bridge has a bridging effect. As far as the vswitch is concerned, there is a port-to-mac ing table, which isolates collision ). Simply put, a bridge can connect two different physical LAN networks. It is a storage and forwarding device that implements LAN interconnection at the link layer. The bridge receives MAC frames from one LAN. After unblocking, checking, and verifying, It reassembles the frames in the format of another LAN and sends them to its physical layer.

The following is a configuration command for router bridging:

Router # sh ru

Building configuration...

Current configuration:

!

Version 12.1:

Service timestamps debug uptime

Service timestamps log uptime

No service password-encryption

!

Hostname router

!

Enable secret 5 $1 $ BE0q $ hj. WBtIBYppMX3zyfaPbR1

!

!

!

!

!

Memory-size iomem 25

Ip subnet-zero

No ip routing

!

!

!

!

Interface Serial0

Description 128 k DL546267 connect to SZ

Ip address 198.127.18.4 255.255.255.0

No ip route-cache

No fair-queue

Bridge-group 1

!

Interface FastEthernet0

Ip address 198.127.18.3 255.255.255.0

No ip route-cache

Speed auto

Bridge-group 1

!

Ip classless

No ip http server

!

Bridge 1 protocol ieee bridge 1 route ip

!

Line con 0

Transport input none

Line aux 0

Line vty 0 4

Password csl

Login

!

No scheduler allocate

End