帧中继是一种广域网技术,是使用一种包交换方式的广域网技术,就是为用户建立一条端到端的虚拟链路,中间经过的帧中继网络对用户是透明的,用起来跟租用物理专线是一样的,而且比租用专线便宜,常用于分公司与总公司之间的连接
帧中继协议是一种统计时分复用的协议,他在单一物理传输线路上能够提供多条虚电路,每一条虚电路都用数据链路连接标识DLCI来标识
配置点到点的帧中继:
核心代码配置:
AR1:
<Huawei>sys
Enter system view, return user view with Ctrl+Z.
[Huawei]sys R1(改名)
[R1]un in en(锁定通知信息)
Info: Information center is disabled.
[R1]int s2/0/0(进入接口)
[R1-Serial2/0/0]link-protocol fr(帧中继协议)
Warning: The encapsulation protocol of the link will be changed. Continue? [Y/N]
:y
[R1-Serial2/0/0]fr interface-type dte(接口类型为dte)
[R1]int s2/0/0.1 p2p(点到点类型子接口)
[R1-Serial2/0/0.1]fr dlci 40(指定子接口的DLCI)
[R1-fr-dlci-Serial2/0/0.1-40]q
[R1-Serial2/0/0.1]ip ad 172.16.1.1 24(配置子接口的ip地址)
[R1-Serial2/0/0.1]q
[R1]int s2/0/0.2 p2p(点到点类型的子接口)
[R1-Serial2/0/0.2]fr dlci 20(指定子接口的DLCI)
[R1-fr-dlci-Serial2/0/0.2-20]q
[R1-Serial2/0/0.2]ip address 172.16.0.1 24(配置IP地址)
[R1-Serial2/0/0.2]q
[R1]int Vlanif 1
[R1-Vlanif1]ip ad 192.168.0.1 24(配置内网接口)
[R1-Vlanif1]q
[R1]ip route-static 192.168.1.0 24 172.16.1.2(添加静态路由)
[R1]ip route-static 192.168.2.0 24 172.16.0.2
[R1]
AR2:
<Huawei>sys
Enter system view, return user view with Ctrl+Z.
[Huawei]sys R2
[R2]un in en
Info: Information center is disabled.
[R2]int s2/0/0
[R2-Serial2/0/0]lin
[R2-Serial2/0/0]link-protocol fr
Warning: The encapsulation protocol of the link will be changed. Continue? [Y/N]
:y
[R2-Serial2/0/0]fr interface-type dte
[R2-Serial2/0/0]q
[R2]int s2/0/0.1 p2p
[R2-Serial2/0/0.1]q
[R2]int s2/0/0.1 p2p
[R2-Serial2/0/0.1]fr dlci 41
[R2-fr-dlci-Serial2/0/0.1-41]q
[R2-Serial2/0/0.1]ip address 172.16.1.2 24
[R2-Serial2/0/0.1]q
[R2]int s2/0/0.2 p2p
[R2-Serial2/0/0.2]fr dlci 30
[R2-fr-dlci-Serial2/0/0.2-30]q
[R2-Serial2/0/0.2]ip ad 172.16.2.1 24
[R2-Serial2/0/0.2]q
[R2]int Vlanif 1
[R2-Vlanif1]ip address 192.168.1.1 24
[R2-Vlanif1]q
[R2]ip route-static 192.168.0.0 24 172.16.1.1
[R2]ip route-static 192.168.2.0 24 172.16.2.2
[R2]
AR3:
<Huawei>sys
Enter system view, return user view with Ctrl+Z.
[Huawei]sys R3
[R3]un in en
Info: Information center is disabled.
[R3]int s2/0/0
[R3-Serial2/0/0]link-protocol fr
Warning: The encapsulation protocol of the link will be changed. Continue? [Y/N]
:y
[R3-Serial2/0/0]fr interface-type dte
[R3-Serial2/0/0]q
[R3]int s2/0/0.1 p2p
[R3-Serial2/0/0.1]fr dlci 31
[R3-fr-dlci-Serial2/0/0.1-31]q
[R3-Serial2/0/0.1]ip address 172.16.2.2 24
[R3-Serial2/0/0.1]q
[R3]int s2/0/0.2 p2p
[R3-Serial2/0/0.2]fr dlci 21
[R3-fr-dlci-Serial2/0/0.2-21]q
[R3-Serial2/0/0.2]ip ad
[R3-Serial2/0/0.2]ip address 172.16.0.2 24
[R3]int Vlanif 1
[R3-Vlanif1]ip address 192.168.2.1 24
[R3-Vlanif1]q
[R3]ip route-static 192.168.0.0 24 172.16.0.1
[R3]ip route-static 192.168.1.0 24 172.16.2.1
[R3]
验证: