CCNP之BSCI实验7: 限制EIGRP查询
CCNP之BSCI实验7: 限制EIGRP查询
实验目的：
1. 理解EIGRP的路由更新机制
2. 掌握STUB的配置及使用路由汇总限制EIGRP的查询范围
实验拓扑：
实验步骤：
1. 按拓扑图配置每台路由器的IP
2. 配置EIGRP
3. 在R3上用的DEBUG命令跟踪EIGRP查询过程，在R1上关闭s0/0
4. 分别在R3的两个端口进行路由汇总。
5. 把R3配置成为末节路由器
6. 在R1上查看邻居表
7. 在R1上再次的开启和关闭s0/0,观察R3的DEBUG信息
注：只能在末节路由器上使用STUB特性。末节路由器是指在远程站点，不会中转数据给其它路由器的路由器。
限制EIGRP查询有两种方法：
1.路由汇总
2.配置末节路由
r1(config)#int s0/0
r1(config-if)#ip add 172.16.2.1 255.255.255.0
r1(config-if)#no sh
r1(config-if)#exit
*Mar 1 00:05:08.431: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up
*Mar 1 00:05:09.431: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
r1(config)#int s0/1
r1(config-if)#ip add 172.16.1.1 255.255.255.0
r1(config-if)#no sh
r1(config-if)#exit
r1(config)#
*Mar 1 00:05:22.847: %LINK-3-UPDOWN: Interface Serial0/1, changed state to up
*Mar 1 00:05:23.847: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state to up
r1(config)#
*Mar 1 00:05:35.327: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down
r1(config)#
*Mar 1 00:05:55.311: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
r1(config)#
r1(config)#router eigrp 1
r1(config-router)#no au
r1(config-router)#net 172.16.0.0
r1(config-router)#
*Mar 1 00:07:03.283: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.2 (Serial0/0) is up: new adjacency
*Mar 1 00:07:03.295: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.1.2 (Serial0/1) is up: new adjacency
r1(config-router)#exit
r1(config)#int s0/0
r1(config-if)#sh
r1(config-if)#
*Mar 1 00:07:49.783: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.2 (Serial0/0) is down: interface down
r1(config-if)#
*Mar 1 00:07:51.699: %LINK-5-CHANGED: Interface Serial0/0, changed state to administratively down
*Mar 1 00:07:52.699: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down
r1(config-if)#no sh
r1(config-if)#
*Mar 1 00:08:30.019: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up
*Mar 1 00:08:31.019: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
r1(config-if)#
*Mar 1 00:08:35.123: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.2 (Serial0/0) is up: new adjacency
r1(config-if)#
*Mar 1 00:14:52.515: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.1.2 (Serial0/1) is resync: peer graceful-restart
r1(config-if)#
*Mar 1 00:15:16.711: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.1.2 (Serial0/1) is down: Interface Goodbye received
r1(config-if)#
*Mar 1 00:15:20.391: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.1.2 (Serial0/1) is up: new adjacency
r1(config-if)#do sh ip eigrp nei detail 查看路由表
IP-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
1 172.16.1.2 Se0/1 10 00:00:13 45 270 0 29
Version 12.4/1.2, Retrans: 1, Retries: 0, Prefixes: 4
Stub Peer Advertising ( CONNECTED SUMMARY ) Routes显示R3是末节路由器
Suppressing queries
0 172.16.2.2 Se0/0 12 00:06:58 64 384 0 28
Version 12.4/1.2, Retrans: 1, Retries: 0, Prefixes: 4
r1(config-if)#sh
r1(config-if)#
*Mar 1 00:17:10.071: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.2 (Serial0/0) is down: interface down
r1(config-if)#
*Mar 1 00:17:11.987: %LINK-5-CHANGED: Interface Serial0/0, changed state to administratively down
*Mar 1 00:17:12.987: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down
r1(config-if)#no sh
r1(config-if)#
*Mar 1 00:17:57.827: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up
*Mar 1 00:17:58.827: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
r1(config-if)#
*Mar 1 00:18:04.799: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.2 (Serial0/0) is up: new adjacency
r1(config-if)#
r2(config-if)#ip add 172.16.2.2 255.255.255.0
r2(config-if)#no sh
r2(config-if)#exit
r2(config)#int s0/1
*Mar 1 00:05:43.187: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up
*Mar 1 00:05:44.187: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
r2(config)#int s0/1
r2(config-if)#ip add 172.16.3.1 255.255.255.0
r2(config-if)#no sh
r2(config-if)#
*Mar 1 00:05:57.527: %LINK-3-UPDOWN: Interface Serial0/1, changed state to up
*Mar 1 00:05:58.527: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state to up
r2(config-if)#exit
r2(config)#router eigrp 1
r2(config-router)#no au
r2(config-router)#net 172.16.0.0
r2(config-router)#exit
r2(config)#
*Mar 1 00:06:47.503: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.3.2 (Serial0/1) is up: new adjacency
r2(config)#
*Mar 1 00:07:02.759: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.1 (Serial0/0) is up: new adjacency
r2(config)#
*Mar 1 00:07:59.715: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.1 (Serial0/0) is down: holding time expired
r2(config)#
*Mar 1 00:08:15.191: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down
r2(config)#
*Mar 1 00:08:34.619: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.2.1 (Serial0/0) is up: new adjacency
*Mar 1 00:08:35.187: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
r2(config)#
*Mar 1 00:13:25.003: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.3.2 (Serial0/1) is resync: peer graceful-restart
r2(config)#
*Mar 1 00:15:16.251: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.3.2 (Serial0/1) is down: Interface Goodbye received
r2(config)#
*Mar 1 00:15:19.631: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.3.2 (Serial0/1) is up: new adjacency
r2(config)#
r3(config)#int loo 1
r3(config-if)#ip add
*Mar 1 00:03:10.727: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up
r3(config-if)#ip add 1.1.1.1 255.255.255.0
r3(config-if)#exit
r3(config)#int loo 2
r3(config-if)#ip add 2
*Mar 1 00:03:25.731: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback2, changed state to up
r3(config-if)#ip add 1.1.2.1 255.255.255.0
r3(config-if)#exit
r3(config)#int loo 3
r3(config-if)#ip add
*Mar 1 00:03:42.835: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback3, changed state to up
r3(config-if)#ip add 1.1.3.1 255.255.255.0
r3(config-if)#exit
r3(config)#int s0/0
r3(config-if)#ip add 172.16.3.2 255.255.255.0
r3(config-if)#no sh
r3(config-if)#exit
r3(config)#int s
*Mar 1 00:04:16.195: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up
*Mar 1 00:04:17.195: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
r3(config)#int s0/1
r3(config-if)#ip add 172.16.1.2 255.255.255.0
r3(config-if)#no sh
r3(config-if)#
*Mar 1 00:04:40.403: %LINK-3-UPDOWN: Interface Serial0/1, changed state to up
*Mar 1 00:04:41.403: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state to up
r3(config-if)#
*Mar 1 00:04:45.239: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down
r3(config-if)#
*Mar 1 00:05:05.259: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state to down
r3(config-if)#
*Mar 1 00:05:25.243: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state to up
r3(config-if)#
*Mar 1 00:06:05.223: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
r3(config-if)#exit
r3(config)#router eigrp 1
r3(config-router)#no au
r3(config-router)#net 1.0.0.0
r3(config-router)#net 172.16.0.0
r3(config-router)#
*Mar 1 00:06:47.195: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.3.1 (Serial0/0) is up: new adjacency
r3(config-router)#
*Mar 1 00:07:02.399: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.1.1 (Serial0/1) is up: new adjacency
r3(config-router)#exit
r3(config)#do debug eigrp packets query
EIGRP Packets debugging is on
(QUERY)
r3(config)#
*Mar 1 00:07:48.975: EIGRP: Received QUERY on Serial0/1 nbr 172.16.1.1
*Mar 1 00:07:48.979: AS 1, Flags 0x0, Seq 11/9 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
r3(config)#
*Mar 1 00:08:14.899: EIGRP: Received QUERY on Serial0/0 nbr 172.16.3.1
*Mar 1 00:08:14.903: AS 1, Flags 0x0, Seq 11/11 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
*Mar 1 00:08:14.915: EIGRP: Enqueueing QUERY on Serial0/1 iidbQ un/rely 0/1 serno 10-10
*Mar 1 00:08:14.915: EIGRP: Enqueueing QUERY on Serial0/0 iidbQ un/rely 0/1 serno 10-10
*Mar 1 00:08:14.919: EIGRP: Enqueueing QUERY on Serial0/1 nbr 172.16.1.1 iidbQ un/rely 0/0 peerQ un/rely 0/0 serno 10-10
*Mar 1 00:08:14.919: EIGRP: Enqueueing QUERY on Serial0/0 nbr 172.16.3.1 iidbQ un/rely 0/0 peerQ un/rely 0/0 serno 10-10
*Mar 1 00:08:14.923: EIGRP: Sending QUERY on Serial0/1 nbr 172.16.1.1
*Mar 1 00:08:14.923: AS 1, Flags 0x0, Seq 13/11 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1 serno 10-10
可以看到R3收到R1,R2的查询，同时也向他们发送了查询。如果在实际大型的网络中，出现了某个问题，则会引起整个网络产生大量的查询，回复包。
r3(config)#
*Mar 1 00:08:34.947: EIGRP: Received QUERY on Serial0/0 nbr 172.16.3.1
*Mar 1 00:08:34.951: AS 1, Flags 0x0, Seq 15/16 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
r3(config)#do un all
All possible debugging has been turned off
r3(config)#int s0/0
r3(config-if)#ip summary-addr eigrp 1 1.0.0.0 255.255.252.0
r3(config-if)#
*Mar 1 00:13:24.575: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.3.1 (Serial0/0) is resync: summary configured
r3(config)#int s0/1
r3(config-if)#ip summary-addr eigrp 1 1.0.0.0 255.255.252.0
r3(config-if)#
*Mar 1 00:14:51.619: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.1.1 (Serial0/1) is resync: summary configured
r3(config-if)#exit
r3(config)#router eigrp 1
r3(config-router)#eigrp stub
r3(config-router)#
*Mar 1 00:15:15.851: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.3.1 (Serial0/0) is down: peer info changed
*Mar 1 00:15:15.863: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.1.1 (Serial0/1) is down: peer info changed
r3(config-router)#
*Mar 1 00:15:19.191: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.3.1 (Serial0/0) is up: new adjacency
*Mar 1 00:15:19.467: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.1.1 (Serial0/1) is up: new adjacency
r3(config-router)#do debug eigrp packets query
EIGRP Packets debugging is on
(QUERY)
r3(config-router)#
*Mar 1 00:17:34.903: EIGRP: Enqueueing QUERY on Serial0/1 iidbQ un/rely 0/1 serno 19-19
*Mar 1 00:17:34.903: EIGRP: Enqueueing QUERY on Serial0/0 iidbQ un/rely 0/1 serno 19-19
*Mar 1 00:17:34.907: EIGRP: Enqueueing QUERY on Serial0/1 nbr 172.16.1.1 iidbQ un/rely 0/0 peerQ un/rely 0/0 serno 19-19
*Mar 1 00:17:34.907: EIGRP: Enqueueing QUERY on Serial0/0 nbr 172.16.3.1 iidbQ un/rely 0/0 peerQ un/rely 0/0 serno 19-19
*Mar 1 00:17:34.911: EIGRP: Sending QUERY on Serial0/1 nbr 172.16.1.1
*Mar 1 00:17:34.911: AS 1, Flags 0x0, Seq 34/31 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1 serno 19-19
*Mar 1 00:17:34.915: EIGRP: Sending QUERY on Serial0/0 nbr 172.16.3.1
r3(config-router)#
*Mar 1 00:17:34.915: AS 1, Flags 0x0, Seq 35/31 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1 serno 19-19
R3没有收到查询
r3(config-router)#do un all
All possible debugging has been turned off
r3(config-router)#