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配置帧中继于接口(2)

2019-11-04 20:38:08
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  第2部分:配置和监测帧中继多点子接口
  
    以下的配置把R1的S0接口设置成为帧中继的多点子接口,其他路由器依然使用物理接口。
    配置清单8-6列出了各路由器的配置。
  
    配置清单8-6配置帧中继多点子接口
  
    第1段:R1路由器的配置
    version 12.1
    service timestamps debug uptime
    service timestamps log uptime
    no service passWord-encryption
    !
    hostname R1
    !
    ip subnet-zero
    !
    interface Loopback0
     ip address 10.1.1.1255.255.255.0
    !
    interface Serial0
    no ip address
     encapsulation frame-relay
     no fair-queue
     no frame-relay inverse-arp
    interface Serial0.2 multipoint
     bandwidth 64
     ip address 192.168.1.1255.255.255.0
     frame-relay map ip 192.16S.1.2 102 broadcast
     frame-relay map ip 192.168.1.3 103 broadcast
    !
    router eigrp 100
     network 10.1.1.0 0.0.0.255
     network 192.168.1.00.0.0.255
     no auto-summary
     no eigrp log-neighbor-changes
    !
    ip classless
    ip http server
    !
    line con 0
    line aux 0
    line vty 0 4
    !
    end
    第2段:R2路由器的配置
    version 12.1
    service timestamps debug uptime
    service timestamps log uptime
    no service password-encryption
    !
    hostname R2
    !
    ip subnet-zero
    no ip finger
    !
    interface Loopback0
     ip address 10.1.2.1255.255.255.0
    !
    interface Serial0
     bandwidth 64
     ip address 192.168.1.2 255.255.255.0
     encapsulation frame-relay
     no fair-queue
     frame-relay map ip 192.168.1.1 201 broadcast
     frame-relay interface-dici 201
     no frame-relay inverse-arp
    !
    router eigrp 100
     network 10.1.2.00.0.0.255
     network 192.168.1.0
     no auto-summary
     no eigrp log-neighbor-changes
    !
    ip classless
    ip http server
    !
    line con 0
     transport input none
    line aux 0
    line vty 0 4
    !
    end
    第3段:R3路由器的配置
    version 12.1
    service timestamps debug uptime
    service timestamps log uptime
    no service password-encryption
    !
    hostname R3
    !
    ip subnet-zero
    no ip finger
    !
    interface Loopback0
     ip address 10.1.3.1255.255.255.0
     !
    interface Serial0
     bandwidth 64
     ip address 192.168.L3
     encapsulation frame-relay
     no fair-queue
    frame-relay map ip 192.168.1.1 301 broadcast
    frame-relay interface-dici 301
    no frame-relay inverse-arp
    !
    router eigrp 100
    network 10.1.3.00.0.0.255
    network 192.168.1.0
    no auto-summary
    no eigrp log-neighbor-changes
    !
    ip classless
    ip http server
    !
    line con 0
     transport input none
    line aux 0
    line vty 0 4
    !
    end
  
    (1)第1段中,对R1路由器进行了帧中继多点子接口的配置。配置中注重以下几点:
    ●在物理接口下只配置帧中继封装,不配置IP地址和带宽属性;
    ●定义子接口号可以任意,如实验中的S0.2;
    ●在定义子接口号时指定所用的方式,即多点方式;
    ●在多点子接口中定义IP地址、带宽,并配置帧中继MAP语旬;
    ●在多点子接口配置方式下,该于接口可连接多台路由器。
    (2)R2和R3路由器使用的是物理接口来配置帧中继,使用了MAP语旬定义静态映射。注重R1。R2和R3三台路由器的S0接口共处于192.168.1.0/24网段中。
    这是一个典型的NBMA(Nonebroadcast Multiaccess,非广播式多路访问)环境,在下面的探讨中将看到它的一些特点。
    (3)EIGRP协议的配置与点到点方式下相似。
    监测清单8-5所列内容是对上述配置的监测和调试的过程。
  
    监测清单8-5查看帧中继多点子接口配置结果
  
    第1段:查看EIGRP路由表
    R1#sh ip route eigrp
      10.0.0.0/24 is subnetted, 3 subnets
    D   10.1.3.0[90/40640000]via 192.168.1.3,00:08:24,Serial0.2
    D   10.1.2.0[90/40640000]via 192.l68.1.2,00:07:42.Serial0.2
    R1#
    Term_Server#2
    [Resuming connection 2 to r2 ... ]
  
    R2#sh ip route eigrp
      10.0.0.0/24 is subnetted, 2 subnets
    D   10.1.1.0 [90/406400003 via 192.168.1.1,00:07:51,Serial0
    R2#
    Term_Server#3
    [Resuming connection 3 to r3 ... ]
  
    R3#sh ip route eigrp
      10.0.0.0/24 is subnetted, 2 subnets
    D   10.1.1,0 [90/40640000] via 192.168.1.1,00:08:34,Serial0
    R3#
    第2段:禁用EIGRP水平分割并查看路由表和网络连通性
    Term_Server#1
    [Resuming connection 1 to r1 ... ]
  
    R1#conft
    Enter configuration commands, one per line. End with CNTL/Z.
    R1(config)#int s0.2
    R1(config-subif)#no ip split-horizon eigrp 100
    R1(config-subif)#^Z
    R1#
    Term_Server#2
    [Resuming connection 2 to r2 ... ]
   
    R2#
    R2#sh ip route eigrp
      10.0.0.0/24 is subnetted, 3 subnets
    D   10.1.2.0[90/41152000]via 192.168.1.1,00:00:34,Serial0
    D   10.1.1.0[90/40640000]via 192.168.1.1,00:00:34,Serial0
    R2#
    Term_Server#3
    [Resuming connection 3 to r3 ... ]
  
    R3#sh ip route eigrp
      10.0.0.0/24 is subnetted, 3 subnets
    D   10.1.2.0[90/41152000]via 192.168.1.1,00:17:25,Serial0
    D   10.1.1.0[90/40640000]via 192.168.1.1,00:17:25,Serial0
    R3#
    R3#ping 10.1.2.1
    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to 10.1.2.1, timeout is 2 seconds:
    .....
    SUCcess rate is 0 percent (0/5)
    第3段:增加帧中继静态映射并再次测试连通性
    R3#ping
    PRotocol [ip]:
    Target IP address: 10.1.2.1
    Repeat count [5]:
    Datagram size [ 100]:
    Timeout in seconds [2]:
    Extended commands [n]: y
    Source address or interface: 10.1.3.1
    Type of service [0]:
    Set DF bit in IP header? [no]:
    Validate reply data? [no]:
    Data pattern [0xABCD]:
    Loose, Strict, Record, Timestamp, Verbose[none]:
    Sweep range of sizes [n]:
    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to 10.1.2.1, timeout is 2 seconds:
    !!!!!
    Success rate is 100 percent(5/5),round-trip min/avg/max=116/116/120 ms
    
    R3#conf t
    Enter configuration commands, one per line. End with CNTL/Z.
    R3(config)#int sO
    R3(config-if)#frame map ip 192.168.1.2 301 broadcast
    R3(config-if)#
    Term_Server#^2
    [Resuming connection 2 to r2 ... ]
  
    R2#conft
    Enter configuration commands, one per line. End with CNTL/Z.
    R2(config)#int sO
    R2(config-if)#frame map ip 192.168.1.3 201 broadcast
    R2(config-if)#^Z
    R2#
    R2#ping 192.168.1.3
    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to 192.168.1.3, timeout is 2 seconds:
    !!!!!
    Success rate is 100 percent(5/5),round-trip min/avg/max=120/124/36 ms
    R2#ping 10.1.3.1
    Type es


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