目指せ!!CCIE: 5月 2017

2017年5月31日水曜日

EIGRP 自動集約設定(auto summary / no auto summary )

◾️EIGRP 自動集約設定(auto summary / no auto summary )

　【課題】
　　・EIGRPのおける集約設定(auto summary / no auto summary )の挙動を理解する。

　【補足】
　　　EIGRPで集約する方法は大きく2パターンある。
　　　①自動集約による集約経路の広告
　　　　・ルータコンフィグレーションモードにて設定
　　　　・クラスフルネットワークの境界ルータにて設定する必要があり。
　　　　・クラスフルでの集約のみサポート
　　　　・EIGRP内部経路のみ集約可能
　　　②手動集約による集約経路の広告
　　　　・IFモードにて設定
　　　　・集約プレフィックスを細かく設定可能
　　　　・EIGRP内部経路/外部経路共に集約可能

◾️検証環境図

①検証環境　事前設定確認

(1)EIGRPネイバー確認

　EIGRPネイバーが正常に張れている事を確認する。
　※EIGRPネイバーの正常性確認時に確認するポイントは「Q Cnt」です。
　「Q Cnt」は送信キューに溜まっているEIGRPパケット数がカウントされており、
　正常時は「０」です。

R1#show ip eigrp neighbors

EIGRP-IPv4 Neighbors for AS(1)

H Address Interface Hold Uptime SRTT RTO Q Seq

(sec) (ms) Cnt Num

0 192.168.12.2 Et0/0 11 00:05:59 12 100 0 3

R2#show ip eigrp neighbors

EIGRP-IPv4 Neighbors for AS(1)

H Address Interface Hold Uptime SRTT RTO Q Seq

(sec) (ms) Cnt Num

1 192.168.23.3 Et0/1 11 00:00:08 11 100 0 3

0 192.168.12.1 Et0/0 13 00:06:38 1284 5000 0 4

R3#show ip eigrp neighbors

EIGRP-IPv4 Neighbors for AS(1)

H Address Interface Hold Uptime SRTT RTO Q Seq

(sec) (ms) Cnt Num

0 192.168.23.2 Et0/1 12 00:00:04 1 3000 1 7

(2)自動集約設定デフォルト値確認

R1#show run all | section router eigrp

router eigrp 1

timers active-time 3

timers graceful-restart purge-time 240

metric maximum-hops 100

metric weights 0 1 0 1 0 0

traffic-share balanced

variance 1

network 192.168.12.0

distance eigrp 90 170

no auto-summary //デフォルト状態では自動集約設定は無効化されております。

no passive-interface default

eigrp log-neighbor-changes

eigrp log-neighbor-warnings 10

eigrp event-log-size 500

no shutdown

(3)R3 EIGRPネットワーク追加
　R3にて172.16.1.0~172.16.10.0はEIGRP内部ルートとして広告、192.168.101.0~192.168.110.0
　は外部ルートして広告する。

R3#show run | section router eigrp

router eigrp 1

network 172.16.0.0 0.0.15.255

network 192.168.23.0

redistribute connected route-map connect-to-eigrp

R3#sh run | section route-map connect-to-eigrp

redistribute connected route-map connect-to-eigrp

route-map connect-to-eigrp permit 10

match interface Loopback101 Loopback102 Loopback103 Loopback104 Loopback105 Loopback106 Loopback107 Loopback108 Loopback109 Loopback110

(4)ルーティング確認

　設定前のルーティングを確認する。

R1#sh ip route eigrp

Gateway of last resort is not set

172.16.0.0/32 is subnetted, 10 subnets

D 172.16.1.3 [90/435200] via 192.168.12.2, 00:18:58, Ethernet0/0

D 172.16.2.3 [90/435200] via 192.168.12.2, 00:18:58, Ethernet0/0

D 172.16.3.3 [90/435200] via 192.168.12.2, 00:18:58, Ethernet0/0

D 172.16.4.3 [90/435200] via 192.168.12.2, 00:18:58, Ethernet0/0

D 172.16.5.3 [90/435200] via 192.168.12.2, 00:18:58, Ethernet0/0

D 172.16.6.3 [90/435200] via 192.168.12.2, 00:18:58, Ethernet0/0

D 172.16.7.3 [90/435200] via 192.168.12.2, 00:18:58, Ethernet0/0

D 172.16.8.3 [90/435200] via 192.168.12.2, 00:18:58, Ethernet0/0

D 172.16.9.3 [90/435200] via 192.168.12.2, 00:18:58, Ethernet0/0

D 172.16.10.3 [90/435200] via 192.168.12.2, 00:18:58, Ethernet0/0

D 192.168.23.0/24 [90/307200] via 192.168.12.2, 00:25:20, Ethernet0/0

192.168.101.0/32 is subnetted, 1 subnets

D EX 192.168.101.3 [170/435200] via 192.168.12.2, 00:02:05, Ethernet0/0

192.168.102.0/32 is subnetted, 1 subnets

D EX 192.168.102.3 [170/435200] via 192.168.12.2, 00:02:05, Ethernet0/0

192.168.103.0/32 is subnetted, 1 subnets

D EX 192.168.103.3 [170/435200] via 192.168.12.2, 00:02:05, Ethernet0/0

192.168.104.0/32 is subnetted, 1 subnets

D EX 192.168.104.3 [170/435200] via 192.168.12.2, 00:02:05, Ethernet0/0

192.168.105.0/32 is subnetted, 1 subnets

D EX 192.168.105.3 [170/435200] via 192.168.12.2, 00:02:05, Ethernet0/0

192.168.106.0/32 is subnetted, 1 subnets

D EX 192.168.106.3 [170/435200] via 192.168.12.2, 00:02:05, Ethernet0/0

192.168.107.0/32 is subnetted, 1 subnets

D EX 192.168.107.3 [170/435200] via 192.168.12.2, 00:02:05, Ethernet0/0

192.168.108.0/32 is subnetted, 1 subnets

D EX 192.168.108.3 [170/435200] via 192.168.12.2, 00:02:05, Ethernet0/0

192.168.109.0/32 is subnetted, 1 subnets

D EX 192.168.109.3 [170/435200] via 192.168.12.2, 00:02:05, Ethernet0/0

192.168.110.0/32 is subnetted, 1 subnets

D EX 192.168.110.3 [170/435200] via 192.168.12.2, 00:02:05, Ethernet0/0

R2#sh ip route eigrp

Gateway of last resort is not set

172.16.0.0/32 is subnetted, 10 subnets

D 172.16.1.3 [90/409600] via 192.168.23.3, 00:19:20, Ethernet0/1

D 172.16.2.3 [90/409600] via 192.168.23.3, 00:19:20, Ethernet0/1

D 172.16.3.3 [90/409600] via 192.168.23.3, 00:19:20, Ethernet0/1

D 172.16.4.3 [90/409600] via 192.168.23.3, 00:19:20, Ethernet0/1

D 172.16.5.3 [90/409600] via 192.168.23.3, 00:19:20, Ethernet0/1

D 172.16.6.3 [90/409600] via 192.168.23.3, 00:19:20, Ethernet0/1

D 172.16.7.3 [90/409600] via 192.168.23.3, 00:19:20, Ethernet0/1

D 172.16.8.3 [90/409600] via 192.168.23.3, 00:19:20, Ethernet0/1

D 172.16.9.3 [90/409600] via 192.168.23.3, 00:19:20, Ethernet0/1

D 172.16.10.3 [90/409600] via 192.168.23.3, 00:19:20, Ethernet0/1

192.168.101.0/32 is subnetted, 1 subnets

D EX 192.168.101.3 [170/409600] via 192.168.23.3, 00:02:28, Ethernet0/1

192.168.102.0/32 is subnetted, 1 subnets

D EX 192.168.102.3 [170/409600] via 192.168.23.3, 00:02:28, Ethernet0/1

192.168.103.0/32 is subnetted, 1 subnets

D EX 192.168.103.3 [170/409600] via 192.168.23.3, 00:02:28, Ethernet0/1

192.168.104.0/32 is subnetted, 1 subnets

D EX 192.168.104.3 [170/409600] via 192.168.23.3, 00:02:28, Ethernet0/1

192.168.105.0/32 is subnetted, 1 subnets

D EX 192.168.105.3 [170/409600] via 192.168.23.3, 00:02:28, Ethernet0/1

192.168.106.0/32 is subnetted, 1 subnets

D EX 192.168.106.3 [170/409600] via 192.168.23.3, 00:02:28, Ethernet0/1

192.168.107.0/32 is subnetted, 1 subnets

D EX 192.168.107.3 [170/409600] via 192.168.23.3, 00:02:28, Ethernet0/1

192.168.108.0/32 is subnetted, 1 subnets

D EX 192.168.108.3 [170/409600] via 192.168.23.3, 00:02:28, Ethernet0/1

192.168.109.0/32 is subnetted, 1 subnets

D EX 192.168.109.3 [170/409600] via 192.168.23.3, 00:02:28, Ethernet0/1

192.168.110.0/32 is subnetted, 1 subnets

D EX 192.168.110.3 [170/409600] via 192.168.23.3, 00:02:28, Ethernet0/1

R3#sh ip route eigrp

Gateway of last resort is not set

D 192.168.12.0/24 [90/307200] via 192.168.23.2, 00:07:22, Ethernet0/1

②設定変更1(EIGRP auto-summary)

(1)R2にてauto-summaryを設定する。
※ネイバーが一度切れます。

R2(config)#router eigrp 1

R2(config-router)#no auto-summary

May 30 01:32:38.643: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 192.168.23.3 (Ethernet0/1) is resync: summary configured

May 30 01:32:38.643: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 192.168.12.1 (Ethernet0/0) is resync: summary configured

(2)R1にてルーティング確認をする。
　※自動集約はクラスフルネットワークの境界ルータ(本検証環境でいうとR3)で実施する必要がある為、R2にauto-summaryを設定しても集約されていない事を確認する。

R1#sh ip route eigrp

Gateway of last resort is not set

172.16.0.0/32 is subnetted, 10 subnets

D 172.16.1.3 [90/435200] via 192.168.12.2, 00:00:11, Ethernet0/0

D 172.16.2.3 [90/435200] via 192.168.12.2, 00:00:11, Ethernet0/0

D 172.16.3.3 [90/435200] via 192.168.12.2, 00:00:11, Ethernet0/0

D 172.16.4.3 [90/435200] via 192.168.12.2, 00:00:11, Ethernet0/0

D 172.16.5.3 [90/435200] via 192.168.12.2, 00:00:11, Ethernet0/0

D 172.16.6.3 [90/435200] via 192.168.12.2, 00:00:11, Ethernet0/0

D 172.16.7.3 [90/435200] via 192.168.12.2, 00:00:11, Ethernet0/0

D 172.16.8.3 [90/435200] via 192.168.12.2, 00:00:11, Ethernet0/0

D 172.16.9.3 [90/435200] via 192.168.12.2, 00:00:11, Ethernet0/0

D 172.16.10.3 [90/435200] via 192.168.12.2, 00:00:11, Ethernet0/0

D 192.168.23.0/24 [90/307200] via 192.168.12.2, 00:31:41, Ethernet0/0

192.168.101.0/32 is subnetted, 1 subnets

D EX 192.168.101.3 [170/435200] via 192.168.12.2, 00:08:26, Ethernet0/0

192.168.102.0/32 is subnetted, 1 subnets

D EX 192.168.102.3 [170/435200] via 192.168.12.2, 00:08:26, Ethernet0/0

192.168.103.0/32 is subnetted, 1 subnets

D EX 192.168.103.3 [170/435200] via 192.168.12.2, 00:08:26, Ethernet0/0

192.168.104.0/32 is subnetted, 1 subnets

D EX 192.168.104.3 [170/435200] via 192.168.12.2, 00:08:26, Ethernet0/0

192.168.105.0/32 is subnetted, 1 subnets

D EX 192.168.105.3 [170/435200] via 192.168.12.2, 00:08:26, Ethernet0/0

192.168.106.0/32 is subnetted, 1 subnets

D EX 192.168.106.3 [170/435200] via 192.168.12.2, 00:08:26, Ethernet0/0

192.168.107.0/32 is subnetted, 1 subnets

D EX 192.168.107.3 [170/435200] via 192.168.12.2, 00:08:26, Ethernet0/0

192.168.108.0/32 is subnetted, 1 subnets

D EX 192.168.108.3 [170/435200] via 192.168.12.2, 00:08:26, Ethernet0/0

192.168.109.0/32 is subnetted, 1 subnets

D EX 192.168.109.3 [170/435200] via 192.168.12.2, 00:08:26, Ethernet0/0

192.168.110.0/32 is subnetted, 1 subnets

D EX 192.168.110.3 [170/435200] via 192.168.12.2, 00:08:26, Ethernet0/0

②設定変更2(EIGRP auto-summary)

(1)R3にてauto-summaryを設定する。

R3(config)#router eigrp 1

R3(config-router)#auto-summary

May 30 01:39:08.173: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 192.168.23.2 (Ethernet0/1) is resync: summary configured

May 30 01:39:08.189: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 192.168.23.2 (Ethernet0/1) is resync: summary up, remove components

(2)R1/R2/R3にてルーティング確認をする。

・R1-R2にて172.16.経路が集約されている事を確認する。
　・R3にてループ防止のNull0が設定されている事を確認する。
　・外部経路は集約されていない事を確認する。
　　※/16以外(例えば/20)で集約したい場合は、手動集約にて設定する必要があります。
　　　又、外部経路を集約する必要がある場合は手動集約にて設定する必要があります。

R1#sh ip route eigrp

Gateway of last resort is not set

172.16.0.0/16 is subnetted, 1 subnets

D 172.16.0.0 [90/435200] via 192.168.12.2, 00:01:14, Ethernet0/0

D 192.168.23.0/24 [90/307200] via 192.168.12.2, 00:38:12, Ethernet0/0

192.168.101.0/32 is subnetted, 1 subnets

D EX 192.168.101.3 [170/435200] via 192.168.12.2, 00:14:57, Ethernet0/0

192.168.102.0/32 is subnetted, 1 subnets

D EX 192.168.102.3 [170/435200] via 192.168.12.2, 00:14:57, Ethernet0/0

192.168.103.0/32 is subnetted, 1 subnets

D EX 192.168.103.3 [170/435200] via 192.168.12.2, 00:14:57, Ethernet0/0

192.168.104.0/32 is subnetted, 1 subnets

D EX 192.168.104.3 [170/435200] via 192.168.12.2, 00:14:57, Ethernet0/0

192.168.105.0/32 is subnetted, 1 subnets

D EX 192.168.105.3 [170/435200] via 192.168.12.2, 00:14:57, Ethernet0/0

192.168.106.0/32 is subnetted, 1 subnets

D EX 192.168.106.3 [170/435200] via 192.168.12.2, 00:14:57, Ethernet0/0

192.168.107.0/32 is subnetted, 1 subnets

D EX 192.168.107.3 [170/435200] via 192.168.12.2, 00:14:57, Ethernet0/0

192.168.108.0/32 is subnetted, 1 subnets

D EX 192.168.108.3 [170/435200] via 192.168.12.2, 00:14:57, Ethernet0/0

192.168.109.0/32 is subnetted, 1 subnets

D EX 192.168.109.3 [170/435200] via 192.168.12.2, 00:14:57, Ethernet0/0

192.168.110.0/32 is subnetted, 1 subnets

D EX 192.168.110.3 [170/435200] via 192.168.12.2, 00:14:57, Ethernet0/0

R2#sh ip route eigrp

Gateway of last resort is not set

D 172.16.0.0/16 [90/409600] via 192.168.23.3, 00:01:35, Ethernet0/1　　//集約されている。

192.168.101.0/32 is subnetted, 1 subnets

D EX 192.168.101.3 [170/409600] via 192.168.23.3, 00:15:19, Ethernet0/1

192.168.102.0/32 is subnetted, 1 subnets

D EX 192.168.102.3 [170/409600] via 192.168.23.3, 00:15:19, Ethernet0/1

192.168.103.0/32 is subnetted, 1 subnets

D EX 192.168.103.3 [170/409600] via 192.168.23.3, 00:15:19, Ethernet0/1

192.168.104.0/32 is subnetted, 1 subnets

D EX 192.168.104.3 [170/409600] via 192.168.23.3, 00:15:19, Ethernet0/1

192.168.105.0/32 is subnetted, 1 subnets

D EX 192.168.105.3 [170/409600] via 192.168.23.3, 00:15:19, Ethernet0/1

192.168.106.0/32 is subnetted, 1 subnets

D EX 192.168.106.3 [170/409600] via 192.168.23.3, 00:15:19, Ethernet0/1

192.168.107.0/32 is subnetted, 1 subnets

D EX 192.168.107.3 [170/409600] via 192.168.23.3, 00:15:19, Ethernet0/1

192.168.108.0/32 is subnetted, 1 subnets

D EX 192.168.108.3 [170/409600] via 192.168.23.3, 00:15:19, Ethernet0/1

192.168.109.0/32 is subnetted, 1 subnets

D EX 192.168.109.3 [170/409600] via 192.168.23.3, 00:15:19, Ethernet0/1

192.168.110.0/32 is subnetted, 1 subnets

D EX 192.168.110.3 [170/409600] via 192.168.23.3, 00:15:19, Ethernet0/1

R3#sh ip route eigrp

Gateway of last resort is not set

172.16.0.0/16 is variably subnetted, 11 subnets, 2 masks

D 172.16.0.0/16 is a summary, 00:01:56, Null0 //ループ防止用のNull0がインストールされている

D 192.168.12.0/24 [90/307200] via 192.168.23.2, 00:32:32, Ethernet0/1

2017年5月30日火曜日

EIGRP 手動集約設定(ip summary-address eigrp )

◾️EIGRP 自動集約設定(ip summary-address eigrp )

　【課題】
　　・EIGRPのおける集約設定(ip summary-address eigrp )の挙動を理解する。
　　　※集約設定はR2で実施する事。　【補足】
　　　EIGRPで集約する方法は大きく2パターンある。
　　　①自動集約による集約経路の広告
　　　　・ルータコンフィグレーションモードにて設定
　　　　・クラスフルネットワークの境界ルータにて設定する必要があり。
　　　　・クラスフルでの集約のみサポート
　　　　・EIGRP内部経路のみ集約可能
　　　②集約による集約経路の広告
　　　　・IFモードにて設定
　　　　・集約プレフィックスを細かく設定可能
　　　　・EIGRP内部経路/外部経路共に集約可能
　　　　・設定方法は以下の2パターンあります。
　　　　　(1)ip summary-address eigrp [AS番号][ネットワークアドレス][サブネットマスク]
　　　　　　<例>ip summary-address eigrp 1 172.16.0.0 255.255.240.0
　　　　　(2)ip summary-address eigrp [AS番号][ネットワークアドレス][プレフィックス]

　　　　　　<例>ip summary-address eigrp 1 172.16.0.0/20

◾️検証環境図

①検証環境　事前設定確認

(1)EIGRPネイバー確認

R1#show ip eigrp neighbors

EIGRP-IPv4 Neighbors for AS(1)

H Address Interface Hold Uptime SRTT RTO Q Seq

(sec) (ms) Cnt Num

0 192.168.12.2 Et0/0 11 00:05:59 12 100 0 3

R2#show ip eigrp neighbors

EIGRP-IPv4 Neighbors for AS(1)

H Address Interface Hold Uptime SRTT RTO Q Seq

(sec) (ms) Cnt Num

1 192.168.23.3 Et0/1 11 00:00:08 11 100 0 3

0 192.168.12.1 Et0/0 13 00:06:38 1284 5000 0 4

R3#show ip eigrp neighbors

EIGRP-IPv4 Neighbors for AS(1)

H Address Interface Hold Uptime SRTT RTO Q Seq

(sec) (ms) Cnt Num

0 192.168.23.2 Et0/1 12 00:00:04 1 3000 1 7

(2)R3 EIGRPネットワーク追加
　R3にて172.16.1.0~172.16.10.0はEIGRP内部ルートとして広告、192.168.101.0~192.168.110.0
　は外部ルートして広告する。

R3#show run | section router eigrp

router eigrp 1

network 172.16.0.0 0.0.15.255

network 192.168.23.0

redistribute connected route-map connect-to-eigrp

R3#sh run | section route-map connect-to-eigrp

redistribute connected route-map connect-to-eigrp

route-map connect-to-eigrp permit 10

match interface Loopback101 Loopback102 Loopback103 Loopback104 Loopback105 Loopback106 Loopback107 Loopback108 Loopback109 Loopback110

(3)ルーティング確認