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解析驗(yàn)證EIGRP STUB區(qū)域

時(shí)間:2020-08-08 14:08:09 網(wǎng)絡(luò)技術(shù) 我要投稿

解析驗(yàn)證EIGRP STUB區(qū)域

  IGRP STUB區(qū)域設(shè)置了之后,路由器在丟失路由條目的時(shí)候不會(huì)向 STUB區(qū)域發(fā)查詢消息,在上述top中我們可以把Rc做成 STUB區(qū)域,假如Rb的loop0 口down掉了之后,Rb不會(huì)向Rc發(fā)送查詢消息。下面是小編帶來的實(shí)例,歡迎學(xué)習(xí)!

  我們先在這3太路由器上全部啟用EIGRP 10 ,所有的'接口都參與到EIGRP 10 在沒有設(shè)置stub的時(shí)候,得到路由表如下:

  RA:

  1.0.0.0/24 is subnetted, 1 subnets

  C 1.1.1.0 is directly connected, Loopback0

  2.0.0.0/24 is subnetted, 1 subnets

  D 2.2.2.0 [90/2297000] via 12.1.1.2, 00:01:26, Serial2/1

  3.0.0.0/24 is subnetted, 1 subnets

  D 3.3.3.0 [90/2297000] via 12.1.1.2, 00:00:37, Serial2/1

  23.0.0.0/30 is subnetted, 1 subnets

  D 23.1.1.0 [90/2297000] via 12.1.1.2, 00:01:26, Serial2/1

  12.0.0.0/30 is subnetted, 1 subnets

  C 12.1.1.0 is directly connected, Serial2/1

  Rb:

  1.0.0.0/24 is subnetted, 1 subnets

  D 1.1.1.0 [90/2297000] via 12.1.1.1, 00:02:30, Serial2/1

  2.0.0.0/24 is subnetted, 1 subnets

  C 2.2.2.0 is directly connected, Loopback0

  3.0.0.0/24 is subnetted, 1 subnets

  D 3.3.3.0 [90/2297000] via 23.1.1.1, 00:01:41, Serial2/2

  23.0.0.0/30 is subnetted, 1 subnets

  C 23.1.1.0 is directly connected, Serial2/2

  12.0.0.0/30 is subnetted, 1 subnets

  C 12.1.1.0 is directly connected, Serial2/1

  Rc:

  1.0.0.0/24 is subnetted, 1 subnets

  D 1.1.1.0 [90/2297000] via 23.1.1.2, 00:02:06, Serial2/2

  2.0.0.0/24 is subnetted, 1 subnets

  D 2.2.2.0 [90/2297000] via 23.1.1.2, 00:02:06, Serial2/2

  3.0.0.0/24 is subnetted, 1 subnets

  C 3.3.3.0 is directly connected, Loopback0

  23.0.0.0/30 is subnetted, 1 subnets

  C 23.1.1.0 is directly connected, Serial2/2

  12.0.0.0/30 is subnetted, 1 subnets

  D 12.1.1.0 [90/2297000] via 23.1.1.2, 00:02:06, Serial2/2

  下面,我們開始試驗(yàn),在Rc上沒有設(shè)置stub的時(shí)候,在Rb上打開debug

  RB#debug eigrp packets query

  RB EIGRP Packets debugging is on

  (QUERY)

  RB#config t

  Enter configuration commands, one per line. End with CNTL/Z.

  RB(config)#

  RB(config)#int loopback 0

  RB(config-if)#shu

  *Mar 1 00:16:38.587: EIGRP: Enqueueing QUERY on Serial2/1 iidbQ un/rely 0/1 serno 6-6

  *Mar 1 00:16:38.591: EIGRP: Enqueueing QUERY on Serial2/1 nbr 12.1.1.1 iidbQ un/rely 0/0 peerQ un/rely 0/0 serno 6-6

  *Mar 1 00:16:38.599: EIGRP: Sending QUERY on Serial2/1 nbr 12.1.1.1 (向RA發(fā)送查詢)

  *Mar 1 00:16:38.603: AS 10, Flags 0x0, Seq 10/3 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1 serno 6-6

  *Mar 1 00:16:38.607: EIGRP: Enqueueing QUERY on Serial2/2 iidbQ un/rely 0/1 serno 6-6

  *Mar 1 00:16:38.611: EIGRP: Enqueueing QUERY on Serial2/2 nbr 23.1.1.1 iidbQ un/rely 0/0 peerQ un/rely 0/0 serno 6-6

  *Mar 1 00:16:38.619: EIGRP: Sending QUERY on Serial2/2 nbr 23.1.1.1 (向RC發(fā)送查查詢)

  *Mar 1 00:16:38.623: AS 10, Flags 0x0, Seq 11/3 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1 serno 6-6

  可以看到,沒有設(shè)置stub的時(shí)候 Rb會(huì)向RA和 Rc發(fā)送查詢消息。下面我們把Rc做成 STUB區(qū)域.

  我們先把RB上的loopback 0 打開,讓網(wǎng)絡(luò)回到正常的收斂

  Rb(config-it)# int lo 0

  Rb(config-it)#no sh

  然后把RC設(shè)置成STUB區(qū)域

  RC(config)#router ei 100

  RC(config-router)#eigrp stub receive-only

  再關(guān)掉RB上的loopback 0

  再來看RB的查詢情況:

  *Mar 1 00:28:13.139: EIGRP: Enqueueing QUERY on Serial2/2 iidbQ un/rely 0/1 serno 9-9

  *Mar 1 00: 28:13.143: EIGRP: Enqueueing QUERY on Serial2/2 nbr 23.1.1.1 iidbQ un/rely 0/0 peerQ un/rely 0/0 serno 9-9

  *Mar 1 00: 28:13.151: EIGRP: Enqueueing QUERY on Serial2/1 iidbQ un/rely 0/1 serno 9-9

  *Mar 1 00: 28:13.155: EIGRP: Enqueueing QUERY on Serial2/1 nbr 12.1.1.1 iidbQ un/rely 0/0 peerQ un/rely 0/0 serno 9-9

  *Mar 1 00: 28:13.163: EIGRP: Sending QUERY on Serial2/1 nbr 12.1.1.1 (向RA發(fā)送查詢)

  *Mar 1 00: 28:13.163: AS 10, Flags 0x0, Seq 19/8 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1 serno 9-9

  *Mar 1 00: 28:13.351: EIGRP: Received QUERY on Serial2/2 nbr 23.1.1.1

  RB(config-if)#

  *Mar 1 00: 28:13.355: AS 10, Flags 0x0, Seq 11/21 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0

  自始至終沒有發(fā)現(xiàn)去往Rc的查詢消息,所以,EIGRP的 STUB區(qū)域驗(yàn)證成功。

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