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  • 实验前准备1、电脑上安装华为ENSP模拟器2、添加三台路由器配置命令上一章已经介绍过,这里就...RIPv1和RIPv2都有自动汇总机制,RIPv1无法关闭自动汇总,RIPv2可以关闭自动汇总,并且对于华为设备而言当我们启用RIPv...

    3d49d3df72a2564ec2384a15c8cc8713.png

    实验前准备

    1、电脑上安装华为ENSP模拟器

    2、添加三台路由器

    4c321bcfacd1ce20dcd9714002e43ceb.png

    配置命令上一章已经介绍过,这里就不在赘述

    总结:

    1.什么是自动汇总?

    当子网路由传递到主类网段边界的时候,路由器会将子网路由汇总为主类网段再发送出去。

    2.RIPv1和RIPv2对于自动汇总有什么区别?

    RIPv1和RIPv2都有自动汇总机制,RIPv1无法关闭自动汇总,RIPv2可以关闭自动汇总,并且

    对于华为设备而言当我们启用RIPv2的时候自动汇总机制已经被默认关闭。

    所以我们才会看到通过RIPv1学到的23.0.0.0/8路由和通过RIPv2学到的23.1.1.0/24路由。

     0f46ee5fffbf4571f3c140fb3ceadce3.gif

     0f46ee5fffbf4571f3c140fb3ceadce3.gif

    226dcfdd0285a78f4f3ee951559913ff.png

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    从零开始学习华为路由交换 | RIP基本配置

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    从零开始学习华为路由交换 | 配置RIP静默接口

    从零开始学习华为路由交换 | 配置基本静态路由

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    努力学习,勤奋工作,让青春更加光彩

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    再长的路,一步步也能走完,再短的路,不迈开双脚也无法到达

    展开全文
  • 华为ENSP模拟器环境下 如图 配置命令上一章已经介绍过,这里就不在赘述, ...RIPv1和RIPv2都有自动汇总机制,RIPv1无法关闭自动汇总,RIPv2可以关闭自动汇总,并且 对于华为设备而言当我们启用RIP...

    华为ENSP模拟器环境下

    如图

    配置命令上一章已经介绍过,这里就不在赘述,

    总结:

    1.什么是自动汇总?

    当子网路由传递到主类网段边界的时候,路由器会将子网路由汇总为主类网段再发送出去。

     

    2.RIPv1和RIPv2对于自动汇总有什么区别?

    RIPv1和RIPv2都有自动汇总机制,RIPv1无法关闭自动汇总,RIPv2可以关闭自动汇总,并且

    对于华为设备而言当我们启用RIPv2的时候自动汇总机制已经被默认关闭。

    所以我们才会看到通过RIPv1学到的23.0.0.0/8路由和通过RIPv2学到的23.1.1.0/24路由。

     

     

     

     

    展开全文
  • BGP路由汇总

    2017-11-12 19:18:00
    2、BGP默认情况下的路由汇总是关闭的,开启的命令为no auto-summary 3、当路由被引入到BGP时,如果路由是主类网络的边界时,BGP才会自动汇总 4、使用network命令进行汇总的方法:如下图所示 1)如下图所示,如果使用...
    1、BGP支持可变长子网掩码、CIDR无类别路由
    2、BGP默认情况下的路由汇总是关闭的,开启的命令为no auto-summary
    3、当路由被引入到BGP时,如果路由是主类网络的边界时,BGP才会自动汇总
    4、使用network命令进行汇总的方法:如下图所示
    1)如下图所示,如果使用network进行汇总路由,则明细路由不要引入BGP,否则不会使用汇总路由(当明细路由与汇总路由共存时,路由器只采用明细路由)
    2)如果192.168.24.0/22没有在路由表中,即使配置了network,BGP将不会通告该路由
    3)使用network是对IGP的路由进行汇总,

     

     

    正确的配置应该是如下图所示:

     

    5)使用 Aggregate-address (聚合)对BGP的路由进行汇总
     格式1:aggregate-address <ip-address> <net-mask> [count <count>] [as-set] [summary-only] [strict]
     格式2:aggregate-address <ip-address> <net-mask> subnet <subnet-address> <subnet-mask>aggregate-address命令使用时,查询本地IGP中存在的路由,如符合配置的聚合条件,则将聚合后的路由信息发布给EBGP邻居。该命令携带几个参数,含义如表1所示。

     

     

     

     

    本文转自zcm8483 51CTO博客,原文链接:http://blog.51cto.com/haolun/992987



    展开全文
  • 实验21: EIGRP路由汇总 1.实验目的 通过本实验可以掌握: ...默认时候EIGRP自动汇总是开启自动汇总只对本地产生EIGRP路由汇总,可以通过“no auto-summary”命令关闭自动汇总,然后进行手工汇...
    实验21: EIGRP 路由汇总
    1.实验目的
    通过本实验可以掌握:
    1)路由汇总的目的
    2EIGRP 自动汇总
    3EIGRP 手工汇总
    4)指向null0 路由的含义
    注:
    默认的时候EIGRP 的自动汇总是开启的,自动汇总只对本地产生的EIGRP 路由汇总,可以通过“no auto-summary”命令关闭自动汇总,然后进行手工汇总
    2.实验拓扑
    本实验拓扑结构如图所示。
    3.实验步骤
    路由器R0R1 R2的配置如下:
    Router(config)#ho r0
    r0(config)#n ip do loo
    % Ambiguous command:  "n ip do loo"
    r0(config)#no ip do loo
    r0(config)#lin c 0
    r0(config-line)#logg s
    r0(config-line)#exec-t 00
    r0(config-line)#exit
    r0(config)#int s0/0
    r0(config-if)#ip add 172.16.1.1 255.255.255.0
    r0(config-if)#no sh
    r0(config-if)#
    *Mar  1 00:02:37.019: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up
    *Mar  1 00:02:38.019: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
    r0(config-if)#exit
    r0(config)#router eigrp 1
    r0(config-router)#net 172.16.1.0 255.255.255.0
    r0(config-router)#         
    *Mar  1 00:03:18.355: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.1.2 (Serial0/0) is up: new adjacency
    r0(config-router)#do sh ip route
    Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
           D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
           N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
           E1 - OSPF external type 1, E2 - OSPF external type 2
           i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
           ia - IS-IS inter area, * - candidate default, U - per-user static route
           o - ODR, P - periodic downloaded static route
     
    Gateway of last resort is not set
     
    D    4.0.0.0/8 [90/2809856] via 172.16.1.2, 00:01:03, Serial0/0
         172.16.0.0/24 is subnetted, 2 subnets
    C       172.16.1.0 is directly connected, Serial0/0
    D       172.16.2.0 [90/2681856] via 172.16.1.2, 00:02:35, Serial0/0
    r0(config-router)#do sh ip route
    Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
           D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
           N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
           E1 - OSPF external type 1, E2 - OSPF external type 2
           i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
           ia - IS-IS inter area, * - candidate default, U - per-user static route
           o - ODR, P - periodic downloaded static route
     
    Gateway of last resort is not set
     
         4.0.0.0/24 is subnetted, 3 subnets
    D       4.4.0.0 [90/2809856] via 172.16.1.2, 00:00:09, Serial0/0
    D       4.4.1.0 [90/2809856] via 172.16.1.2, 00:00:09, Serial0/0
    D       4.4.3.0 [90/2809856] via 172.16.1.2, 00:00:09, Serial0/0
         172.16.0.0/24 is subnetted, 2 subnets
    C       172.16.1.0 is directly connected, Serial0/0
    D       172.16.2.0 [90/2681856] via 172.16.1.2, 00:03:11, Serial0/0
    r0(config-router)#do sh ip route
    Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
           D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
           N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
           E1 - OSPF external type 1, E2 - OSPF external type 2
           i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
           ia - IS-IS inter area, * - candidate default, U - per-user static route
           o - ODR, P - periodic downloaded static route
     
    Gateway of last resort is not set
     
         4.0.0.0/18 is subnetted, 1 subnets
    D       4.4.0.0 [90/2809856] via 172.16.1.2, 00:00:17, Serial0/0
         172.16.0.0/24 is subnetted, 2 subnets
    C       172.16.1.0 is directly connected, Serial0/0
    D       172.16.2.0 [90/2681856] via 172.16.1.2, 00:05:05, Serial0/0
    r0(config-router)#do sh ip route
    Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
           D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
           N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
           E1 - OSPF external type 1, E2 - OSPF external type 2
           i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
           ia - IS-IS inter area, * - candidate default, U - per-user static route
           o - ODR, P - periodic downloaded static route
     
    Gateway of last resort is not set
     
         4.0.0.0/22 is subnetted, 1 subnets
    D       4.4.0.0 [90/2809856] via 172.16.1.2, 00:00:12, Serial0/0
         172.16.0.0/24 is subnetted, 2 subnets
    C       172.16.1.0 is directly connected, Serial0/0
    D       172.16.2.0 [90/2681856] via 172.16.1.2, 00:07:15, Serial0/0
    r0(config-router)#do ping 4.4.0.4
     
    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to 4.4.0.4, timeout is 2 seconds:
    !!!!!
    Success rate is 100 percent (5/5), round-trip min/avg/max = 8/26/52 ms
     
     
     
     
     
    r1(config)#no  ip dom loo
    r1(config)#lin  c 0
    r1(config-line)#logg s
    r1(config-line)#exec-t 00
    r1(config-line)#exit
    r1(config)#int s0/0
    r1(config-if)#ip add 172.16.1.2 255.255.255.0
    r1(config-if)#no sh
    r1(config-if)#exit
    r1(config)#int
    *Mar  1 00:01:50.867: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up
    r1(config)#int s
    *Mar  1 00:01:51.871: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
    r1(config)#int s0/1
    r1(config-if)#ip add 172.16.2.1 255.255.255.0
    r1(config-if)#no sh
    r1(config-if)#
    *Mar  1 00:02:06.259: %LINK-3-UPDOWN: Interface Serial0/1, changed state to up
    r1(config-if)#
    *Mar  1 00:02:07.263: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state to up
    r1(config-if)#
    *Mar  1 00:02:17.307: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down
    r1(config-if)#
    *Mar  1 00:02:27.323: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state to down
    r1(config-if)#
    *Mar  1 00:02:37.315: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state to up
    r1(config-if)#
    *Mar  1 00:02:47.299: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
    r1(config-if)#exit
    r1(config)#router eigrp 1
    r1(config-router)#net 172.16.1.0 255.255.255.0
    r1(config-router)#ne
    *Mar  1 00:03:18.623: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.1.1 (Serial0/0) is up: new adjacency
    r1(config-router)#net 172.16.2.0 255.255.255.0
    r1(config-router)#
    *Mar  1 00:04:53.679: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.2 (Serial0/1) is up: new adjacency
    r1(config-router)#do sh ip route
    Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
           D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
           N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
           E1 - OSPF external type 1, E2 - OSPF external type 2
           i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
           ia - IS-IS inter area, * - candidate default, U - per-user static route
           o - ODR, P - periodic downloaded static route
     
    Gateway of last resort is not set
     
    D    4.0.0.0/8 [90/2297856] via 172.16.2.2, 00:01:20, Serial0/1
         172.16.0.0/24 is subnetted, 2 subnets
    C       172.16.1.0 is directly connected, Serial0/0
    C       172.16.2.0 is directly connected, Serial0/1
    r1(config-router)#
    *Mar  1 00:06:30.931: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.2 (Serial0/1) is resync: peer graceful-restart
    r1(config-router)#do sh ip route
    Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
           D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
           N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
           E1 - OSPF external type 1, E2 - OSPF external type 2
           i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
           ia - IS-IS inter area, * - candidate default, U - per-user static route
           o - ODR, P - periodic downloaded static route
     
    Gateway of last resort is not set
     
         4.0.0.0/24 is subnetted, 3 subnets
    D       4.4.0.0 [90/2297856] via 172.16.2.2, 00:00:15, Serial0/1
    D       4.4.1.0 [90/2297856] via 172.16.2.2, 00:00:15, Serial0/1
    D       4.4.3.0 [90/2297856] via 172.16.2.2, 00:00:15, Serial0/1
         172.16.0.0/24 is subnetted, 2 subnets
    C       172.16.1.0 is directly connected, Serial0/0
    C       172.16.2.0 is directly connected, Serial0/1
    r1(config-router)#
    *Mar  1 00:08:16.487: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.2 (Serial0/1) is resync: peer graceful-restart
    r1(config-router)#do sh ip route
    Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
           D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
           N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
           E1 - OSPF external type 1, E2 - OSPF external type 2
           i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
           ia - IS-IS inter area, * - candidate default, U - per-user static route
           o - ODR, P - periodic downloaded static route
     
    Gateway of last resort is not set
     
         4.0.0.0/18 is subnetted, 1 subnets
    D       4.4.0.0 [90/2297856] via 172.16.2.2, 00:00:29, Serial0/1
         172.16.0.0/24 is subnetted, 2 subnets
    C       172.16.1.0 is directly connected, Serial0/0
    C       172.16.2.0 is directly connected, Serial0/1
    r1(config-router)#
    *Mar  1 00:10:22.879: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.2 (Serial0/1) is resync: peer graceful-restart
    r1(config-router)#
    *Mar  1 00:10:31.659: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.2 (Serial0/1) is resync: peer graceful-restart
    r1(config-router)#do sh ip route
    Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
           D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
           N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
           E1 - OSPF external type 1, E2 - OSPF external type 2
           i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
           ia - IS-IS inter area, * - candidate default, U - per-user static route
           o - ODR, P - periodic downloaded static route
     
    Gateway of last resort is not set
     
         4.0.0.0/22 is subnetted, 1 subnets
    D       4.4.0.0 [90/2297856] via 172.16.2.2, 00:00:25, Serial0/1
         172.16.0.0/24 is subnetted, 2 subnets
    C       172.16.1.0 is directly connected, Serial0/0
    C       172.16.2.0 is directly connected, Serial0/1
    r1(config-router)#
     
     
    r2(config)#no ip do loo
    r2(config)#lin  c 0
    r2(config-line)#logg s
    r2(config-line)#exec-t 00
    r2(config-line)#exit
    r2(config)#int s0/0
    r2(config-if)#ip add 172.16.2.2 255.255.255.0
    r2(config-if)#no sh
    r2(config-if)#
    *Mar  1 00:02:22.755: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up
    r2(config-if)#
    *Mar  1 00:02:23.759: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
    r2(config-if)#exit
    r2(config)#int loo 1
    r2(config-if)#ip add
    *Mar  1 00:03:42.559: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up
    r2(config-if)#ip add 4.4.0.4 255.255.255.0
    r2(config-if)#int loo 2
    r2(config-if)#ip add 4.4.
    *Mar  1 00:03:56.287: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback2, changed state to up
    r2(config-if)#ip add 4.4.1.4 255.255.255.0
    r2(config-if)#int loo 3
    r2(config-if)#ip add 
    *Mar  1 00:04:09.999: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback3, changed state to up
    r2(config-if)#ip add 4.4.2.4 255.255.255.0
    r2(config-if)#int loo 3
    r2(config-if)#ip add 4.4.3.4 255.255.255.0
    r2(config-if)#exit
    r2(config)#roter eigrp 1
                 ^
    % Invalid input detected at '^' marker.
     
    r2(config)#router eigrp 1
    r2(config-router)#net 172.16.2.0 255.255.255.0
    r2(config-router)#net
    *Mar  1 00:04:53.827: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.1 (Serial0/0) is up: new adjacency
    r2(config-router)#net 4.4.0.4 255.255.255.0
    r2(config-router)#net 4.4.1.4 255.255.255.0
    r2(config-router)#net 4.4.2.4 255.255.255.0
    r2(config-router)#net 4.4.3.4 255.255.255.0
    r2(config-router)#do sh ip route
    Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
           D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
           N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
           E1 - OSPF external type 1, E2 - OSPF external type 2
           i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
           ia - IS-IS inter area, * - candidate default, U - per-user static route
           o - ODR, P - periodic downloaded static route
     
    Gateway of last resort is not set
     
         4.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
    C       4.4.0.0/24 is directly connected, Loopback1
    C       4.4.1.0/24 is directly connected, Loopback2
    C       4.4.3.0/24 is directly connected, Loopback3
    D       4.0.0.0/8 is a summary, 00:00:45, Null0
         172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
    D       172.16.0.0/16 is a summary, 00:00:45, Null0
    D       172.16.1.0/24 [90/2681856] via 172.16.2.1, 00:00:52, Serial0/0
    C       172.16.2.0/24 is directly connected, Serial0/0
    以上输出表明路由器R2 的路由表中有条明细路由。以上输出说明,在路由器R2 s0/0执行自动汇总后,会在自己路由表产生一条指向
    null0”的EIGRP 路由,主要是为了防止路由环路的;
     
     
    r2(config-router)#no au
    r2(config-router)#
    *Mar  1 00:06:30.967: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.1 (Serial0/0) is resync: summary configured
    r2(config-router)#exit
    r2(config)#int s0/0 
    r2(config-if)#ip summary-address eigrp 1 4.4.0.0 255.255.192.0
    r2(config-if)#
    *Mar  1 00:08:16.507: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.1 (Serial0/0) is resync: summary configured
    r2(config-if)#do sh ip route
    Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
           D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
           N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
           E1 - OSPF external type 1, E2 - OSPF external type 2
           i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
           ia - IS-IS inter area, * - candidate default, U - per-user static route
           o - ODR, P - periodic downloaded static route
     
    Gateway of last resort is not set
     
         4.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
    C       4.4.0.0/24 is directly connected, Loopback1
    D       4.4.0.0/18 is a summary, 00:00:05, Null0
    C       4.4.1.0/24 is directly connected, Loopback2
    C       4.4.3.0/24 is directly connected, Loopback3
         172.16.0.0/24 is subnetted, 2 subnets
    D       172.16.1.0 [90/2681856] via 172.16.2.1, 00:03:28, Serial0/0
    C       172.16.2.0 is directly connected, Serial0/0
    以上输出说明,在路由器R2 上关闭工汇总后,路由表产生一条指向
    null0”的EIGRP 路由也会消失 ,
     
    r2(config-if)#no ip summary-address eigrp 1 4.4.0.0 255.255.192.0
    r2(config-if)#no ip summary-address eigrp 1 4.4.0.0 255.255.192.0
    *Mar  1 00:10:22.923: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.1 (Serial0/0) is resync: summary configured
    r2(config-if)#ip summary-address eigrp 1 4.4.0.0 255.255.252.0   
    r2(config-if)#
    *Mar  1 00:10:31.675: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.1 (Serial0/0) is resync: summary configured
    r2(config-if)#do sh ip route
    Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
           D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
           N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
           E1 - OSPF external type 1, E2 - OSPF external type 2
           i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
           ia - IS-IS inter area, * - candidate default, U - per-user static route
           o - ODR, P - periodic downloaded static route
     
    Gateway of last resort is not set
     
         4.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
    C       4.4.0.0/24 is directly connected, Loopback1
    D       4.4.0.0/22 is a summary, 00:00:04, Null0
    C       4.4.1.0/24 is directly connected, Loopback2
    C       4.4.3.0/24 is directly connected, Loopback3
         172.16.0.0/24 is subnetted, 2 subnets
    D       172.16.1.0 [90/2681856] via 172.16.2.1, 00:05:41, Serial0/0
    C       172.16.2.0 is directly connected, Serial0/0
    以上输出说明,在路由器R2 s0/0 执行手工汇总后,在路由器R3 上收到被汇总的路由条目“4.4.0.0/22”。
     
    r2(config-if)#
    r2(config-if)#
    r2(config-if)#
    r2(config-if)#


    本文转自gauyanm 51CTO博客,原文链接:http://blog.51cto.com/gauyanm/237307,如需转载请自行联系原作者
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