目指せ!!CCIE

2017年6月5日月曜日

EIGRP 手動集約&一部詳細経路広告(leak-map)

◾️ EIGRP 手動集約&一部詳細経路広告(leak-map)

　【課題】
　　・R1からR4の172.16.x.x通信について172.16.2.0~172.16.3.0はR1/R4経由(ローバラ)、
　　　172.16.1.0はR2経由で通信させる。
　　　※目的※　leak-mapの動作仕様を理解する。
　　　R3の一部のconnectedルート(172.16.1.0~172.16.3.0)をEIGRPに再配布する。
　　　その際R4へは集約経路のみ(172.16.0.0/21)広告し、R2へは集約経路(172.16.0.0/21)と
　　　一部細かい経路(172.16.1.0/24)を広告する。
　

　【補足】
　　　EIGRPにて手動集約を実施した場合、集約ルートの元となっている詳細経路に関し
　　　てはアドバタイズしません。
　　　しかし、leak-mapを利用する事により詳細経路を広告できるようになります。

◾️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

1 192.168.14.4 Et0/1 10 00:00:19 3 100 0 7

0 192.168.12.2 Et0/0 12 05:50:15 10 100 0 160

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 10 05:44:08 3 100 0 61

0 192.168.12.1 Et0/0 11 05:50:38 3 100 0 79

R3#show ip eigrp neighbors

EIGRP-IPv4 Neighbors for AS(1)

H Address Interface Hold Uptime SRTT RTO Q Seq

(sec) (ms) Cnt Num

1 192.168.34.4 Et0/0 11 00:01:09 2 100 0 8

0 192.168.23.2 Et0/1 10 05:44:40 5 100 0 158

IOU4#show ip eigrp neighbors

EIGRP-IPv4 Neighbors for AS(1)

H Address Interface Hold Uptime SRTT RTO Q Seq

(sec) (ms) Cnt Num

1 192.168.34.3 Et0/0 14 00:01:12 10 100 0 62

0 192.168.14.1 Et0/1 12 00:01:18 1020 5000 0 80

(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 192.168.23.0

network 192.168.34.0

redistribute connected route-map connect-to-eigrp

R3#show route-map

route-map connect-to-eigrp, permit, sequence 10

Match clauses:

interface Loopback1 Loopback2 Loopback3 Loopback4

Set clauses:

Policy routing matches: 0 packets, 0 bytes

(3)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, 4 subnets

D EX 172.16.1.3 [170/435200] via 192.168.14.4, 00:00:03, Ethernet0/1

[170/435200] via 192.168.12.2, 00:00:03, Ethernet0/0

D EX 172.16.2.3 [170/435200] via 192.168.14.4, 00:00:03, Ethernet0/1

[170/435200] via 192.168.12.2, 00:00:03, Ethernet0/0

D EX 172.16.3.3 [170/435200] via 192.168.14.4, 00:00:03, Ethernet0/1

[170/435200] via 192.168.12.2, 00:00:03, Ethernet0/0

D EX 172.16.4.3 [170/435200] via 192.168.14.4, 00:00:03, Ethernet0/1

[170/435200] via 192.168.12.2, 00:00:03, Ethernet0/0

D 192.168.23.0/24 [90/307200] via 192.168.12.2, 00:01:23, Ethernet0/0

D 192.168.34.0/24 [90/307200] via 192.168.14.4, 00:01:27, Ethernet0/1

②設定変更(ip summary-address eigrp )

(1)R3にてR3向けにconnectedルート(172.16.1.0~172.16.3.0)を172.16.0.0/21に集約する。

R3(config)#int e0/0

R3(config-if)#ip summary-address eigrp 1 172.16.0.0 255.255.248.0

(2)R1ルーティングを確認する。

R1#sh ip route eigrp

Gateway of last resort is not set

172.16.0.0/16 is variably subnetted, 5 subnets, 2 masks

D 172.16.0.0/21 [90/435200] via 192.168.14.4, 00:00:58, Ethernet0/1

D EX 172.16.1.3/32 [170/435200] via 192.168.12.2, 00:00:58, Ethernet0/0

D EX 172.16.2.3/32 [170/435200] via 192.168.12.2, 00:00:58, Ethernet0/0

D EX 172.16.3.3/32 [170/435200] via 192.168.12.2, 00:00:58, Ethernet0/0

D EX 172.16.4.3/32 [170/435200] via 192.168.12.2, 00:00:58, Ethernet0/0

D 192.168.23.0/24 [90/307200] via 192.168.12.2, 00:02:38, Ethernet0/0

D 192.168.34.0/24 [90/307200] via 192.168.14.4, 00:02:42, Ethernet0/1

(3)R3にてR2向けに集約経路(172.16.0.0/21)と一部細かい経路(172.16.1.0/24)を広告する。

R3(config)#ip prefix-list leak-route seq 10 permit 172.16.1.0/32

R3(config)#route-map Leak-route permit 10

R3(config-route-map)#match ip address prefix-list leak-route

R3(config)#int e0/1

R3(config-if)#ip summary-address eigrp 1 172.16.0.0 255.255.248.0 leak-map Leak-route

(4)R1ルーティングを確認する。

R1#sh ip route eigrp

Gateway of last resort is not set

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

D 172.16.0.0/21 [90/435200] via 192.168.14.4, 00:00:46, Ethernet0/1

[90/435200] via 192.168.12.2, 00:00:46, Ethernet0/0

D EX 172.16.1.3/32 [170/435200] via 192.168.12.2, 00:01:10, Ethernet0/0

D 192.168.23.0/24 [90/307200] via 192.168.12.2, 00:15:15, Ethernet0/0

D 192.168.34.0/24 [90/307200] via 192.168.14.4, 00:15:19, Ethernet0/1

(5)疎通試験

R1#traceroute 172.16.3.3

Type escape sequence to abort.

Tracing the route to 172.16.3.3

VRF info: (vrf in name/id, vrf out name/id)

1 192.168.12.2 6 msec

192.168.14.4 6 msec

192.168.12.2 7 msec

2 192.168.34.3 6 msec

192.168.23.3 8 msec

192.168.34.3 7 msec

R1#traceroute 172.16.1.3

Type escape sequence to abort.

Tracing the route to 172.16.1.3

VRF info: (vrf in name/id, vrf out name/id)

1 192.168.12.2 5 msec 7 msec 7 msec

2 192.168.23.3 7 msec 6 msec 6 msec

2017年6月1日木曜日

EIGRP 手動集約設定 Null0なし(distance 255)

◾️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

　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(ip summary-address eigrp )

(1)R2にてip summary-address eigrp を設定する。

※ネイバーが一度切れます。

★EIGRP内部経路

R2(config)#router eigrp 1

R2(config-if)#ip summary-address eigrp 1 172.16.0.0 255.255.240.0

May 30 01:58:26.297: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 192.168.12.1 (Ethernet0/0) is resync: summary configured

★EIGRP外部経路

R2(config)#router eigrp 1

R2(config-if)#ip summary-address eigrp 1 192.168.96.0/20

May 30 02:05:47.257: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 192.168.12.1 (Ethernet0/0) is resync: summary configured

(2)R1/R2/R3にてルーティング確認をする。

R1#sh ip route eigrp

Gateway of last resort is not set

172.16.0.0/20 is subnetted, 1 subnets

D 172.16.0.0 [90/435200] via 192.168.12.2, 00:07:26, Ethernet0/0 //EIGRP内部経路が集約されている事

D 192.168.23.0/24 [90/307200] via 192.168.12.2, 01:03:44, Ethernet0/0

D 192.168.96.0/20 [90/435200] via 192.168.12.2, 00:00:05, Ethernet0/0 //EIGRP外部経路が集約されている事

R2#sh ip route eigrp

Codes: L - local, 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, H - NHRP, l - LISP

a - application route

+ - replicated route, % - next hop override

Gateway of last resort is not set

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

D 172.16.0.0/20 is a summary, 00:12:26, Null0　　　　　　　　//ループ防止用のNull0がインストールされている

D 172.16.1.3/32 [90/409600] via 192.168.23.3, 00:13:12, Ethernet0/1

D 172.16.2.3/32 [90/409600] via 192.168.23.3, 00:13:12, Ethernet0/1

D 172.16.3.3/32 [90/409600] via 192.168.23.3, 00:13:12, Ethernet0/1

D 172.16.4.3/32 [90/409600] via 192.168.23.3, 00:13:12, Ethernet0/1

D 172.16.5.3/32 [90/409600] via 192.168.23.3, 00:13:12, Ethernet0/1

D 172.16.6.3/32 [90/409600] via 192.168.23.3, 00:13:12, Ethernet0/1

D 172.16.7.3/32 [90/409600] via 192.168.23.3, 00:13:12, Ethernet0/1

D 172.16.8.3/32 [90/409600] via 192.168.23.3, 00:13:12, Ethernet0/1

D 172.16.9.3/32 [90/409600] via 192.168.23.3, 00:13:12, Ethernet0/1

D 172.16.10.3/32 [90/409600] via 192.168.23.3, 00:13:12, Ethernet0/1

D 192.168.96.0/20 is a summary, 00:05:05, Null0　　　　　　　　　//ループ防止用のNull0がインストールされている

192.168.101.0/32 is subnetted, 1 subnets

D EX 192.168.101.3 [170/409600] via 192.168.23.3, 00:06:28, Ethernet0/1

192.168.102.0/32 is subnetted, 1 subnets

D EX 192.168.102.3 [170/409600] via 192.168.23.3, 00:06:28, Ethernet0/1

192.168.103.0/32 is subnetted, 1 subnets

D EX 192.168.103.3 [170/409600] via 192.168.23.3, 00:06:28, Ethernet0/1

192.168.104.0/32 is subnetted, 1 subnets

D EX 192.168.104.3 [170/409600] via 192.168.23.3, 00:06:28, Ethernet0/1

192.168.105.0/32 is subnetted, 1 subnets

D EX 192.168.105.3 [170/409600] via 192.168.23.3, 00:06:28, Ethernet0/1

192.168.106.0/32 is subnetted, 1 subnets

D EX 192.168.106.3 [170/409600] via 192.168.23.3, 00:06:28, Ethernet0/1

192.168.107.0/32 is subnetted, 1 subnets

D EX 192.168.107.3 [170/409600] via 192.168.23.3, 00:06:28, Ethernet0/1

192.168.108.0/32 is subnetted, 1 subnets

D EX 192.168.108.3 [170/409600] via 192.168.23.3, 00:06:28, Ethernet0/1

192.168.109.0/32 is subnetted, 1 subnets

D EX 192.168.109.3 [170/409600] via 192.168.23.3, 00:06:28, Ethernet0/1

192.168.110.0/32 is subnetted, 1 subnets

D EX 192.168.110.3 [170/409600] via 192.168.23.3, 00:06:28, 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, 01:02:47, Ethernet0/1

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

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