目指せ!!CCIE: OSPF データベース上限設定 ( max-lsa / maximum-prefix )

◾️OSPF データベース上限設定 ( max-lsa / maximum-prefix )

　【課題】
　　・R2にて他のOSPFルータから受信可能がLSAの数を10に制限する。
　　　※オプションなしで設定後、warning-onlyオプションを有効にし警告のみにする。

　　・R3にて再配送可能な経路数を5に制限する。
　　　※オプションなしで設定後、warning-onlyオプションを有効にし警告のみにする。

　【補足】
　　MaxLSAは、他のOSPFルータ生成したLSAの受信数を制限する事ができます。
　　デフォルトでは1分経過してもLSA受信最大数を超過している場合は、OSPFネイバーを
　　解消します。(rest-timeオプションにて経過可能時間を変更する事が可能です。)
　　又、warning-onlyオプションを有効にする事で警告のみに変更する事が可能です。

　　Maximum-prefixは、OSPFへ再配布可能な経路数を制限する事ができます。
　　又、warning-onlyオプションを有効にする事で警告のみに変更する事が可能です。　　

◾️検証環境図

①検証環境　事前設定確認

(1)OSPFネイバー確認

　OSPFネイバーが正常に張れている事を確認する。

R1#show ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface

2.2.2.2 1 FULL/BDR 00:00:30 192.168.12.2 Ethernet0/0

R2#show ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface

1.1.1.1 1 FULL/DR 00:00:37 192.168.12.1 Ethernet0/0

3.3.3.3 1 FULL/DR 00:00:32 192.168.23.3 Ethernet0/1

R3#show ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface

2.2.2.2 1 FULL/BDR 00:00:38 192.168.23.2 Ethernet0/1

(2)OSPFインターフェース確認

　設定前のOSPFエリア設定を確認する。

R1#show ip ospf interface brief

Interface PID Area IP Address/Mask Cost State Nbrs F/C

Lo0 1 0 1.1.1.1/32 1 LOOP 0/0

Et0/0 1 0 192.168.12.1/24 10 DR 1/1

R2#show ip ospf interface brief

Interface PID Area IP Address/Mask Cost State Nbrs F/C

Lo0 1 0 2.2.2.2/32 1 LOOP 0/0

Et0/0 1 0 192.168.12.2/24 10 BDR 1/1

Et0/1 1 10 192.168.23.2/24 10 BDR 1/1

※172.16.x.x経路はOSPFarea10に含める。

R3#show ip ospf interface brief

Interface PID Area IP Address/Mask Cost State Nbrs F/C

Lo0 1 10 3.3.3.3/32 1 LOOP 0/0

Lo10 1 10 172.16.10.3/24 1 LOOP 0/0

Lo9 1 10 172.16.9.3/24 1 LOOP 0/0

Lo8 1 10 172.16.8.3/24 1 LOOP 0/0

Lo7 1 10 172.16.7.3/24 1 LOOP 0/0

Lo6 1 10 172.16.6.3/24 1 LOOP 0/0

Lo5 1 10 172.16.5.3/24 1 LOOP 0/0

Lo4 1 10 172.16.4.3/24 1 LOOP 0/0

Lo3 1 10 172.16.3.3/24 1 LOOP 0/0

Lo2 1 10 172.16.2.3/24 1 LOOP 0/0

Lo1 1 10 172.16.1.3/24 1 LOOP 0/0

Et0/1 1 10 192.168.23.3/24 10 DR 1/1

(3)R3再配布対象ネットワークの確認

192.168.x.x経路はOSPFへ再配布する。

R3#show ip interface brief | begin Loopback101

Interface IP-Address OK? Method Status Protocol

Loopback101 192.168.101.3 YES manual up up

Loopback102 192.168.102.3 YES manual up up

Loopback103 192.168.103.3 YES manual up up

Loopback104 192.168.104.3 YES manual up up

Loopback105 192.168.105.3 YES manual up up

Loopback106 192.168.106.3 YES manual up up

Loopback107 192.168.107.3 YES manual up up

Loopback108 192.168.108.3 YES manual up up

Loopback109 192.168.109.3 YES manual up up

Loopback110 192.168.110.3 YES manual up up

R3#show route-map Loopback-to-ospf

route-map Loopback-to-ospf, permit, sequence 10

Match clauses:

interface Loopback101 Loopback102 Loopback103 Loopback104 Loopback105 Loopback106 Loopback107 Loopback108 Loopback109 Loopback110

Set clauses:

Policy routing matches: 0 packets, 0 bytes

R3#show run | se router ospf

router ospf 1

router-id 3.3.3.3

redistribute connected subnets route-map Loopback-to-ospf

(4)ルーティングの確認

R1#sh ip route ospf

Gateway of last resort is not set

2.0.0.0/32 is subnetted, 1 subnets

O 2.2.2.2 [110/11] via 192.168.12.2, 00:06:54, Ethernet0/0

3.0.0.0/32 is subnetted, 1 subnets

O IA 3.3.3.3 [110/21] via 192.168.12.2, 00:06:50, Ethernet0/0

172.16.0.0/32 is subnetted, 10 subnets

O IA 172.16.1.3 [110/21] via 192.168.12.2, 00:06:50, Ethernet0/0

O IA 172.16.2.3 [110/21] via 192.168.12.2, 00:06:50, Ethernet0/0

O IA 172.16.3.3 [110/21] via 192.168.12.2, 00:06:50, Ethernet0/0

O IA 172.16.4.3 [110/21] via 192.168.12.2, 00:06:50, Ethernet0/0

O IA 172.16.5.3 [110/21] via 192.168.12.2, 00:06:50, Ethernet0/0

O IA 172.16.6.3 [110/21] via 192.168.12.2, 00:06:50, Ethernet0/0

O IA 172.16.7.3 [110/21] via 192.168.12.2, 00:06:50, Ethernet0/0

O IA 172.16.8.3 [110/21] via 192.168.12.2, 00:06:50, Ethernet0/0

O IA 172.16.9.3 [110/21] via 192.168.12.2, 00:06:50, Ethernet0/0

O IA 172.16.10.3 [110/21] via 192.168.12.2, 00:06:50, Ethernet0/0

O IA 192.168.23.0/24 [110/20] via 192.168.12.2, 00:06:50, Ethernet0/0

O E2 192.168.101.0/24 [110/20] via 192.168.12.2, 00:06:49, Ethernet0/0　//OSPF外部経路

O E2 192.168.102.0/24 [110/20] via 192.168.12.2, 00:06:49, Ethernet0/0　//OSPF外部経路

O E2 192.168.103.0/24 [110/20] via 192.168.12.2, 00:06:49, Ethernet0/0　//OSPF外部経路

O E2 192.168.104.0/24 [110/20] via 192.168.12.2, 00:06:49, Ethernet0/0　//OSPF外部経路

O E2 192.168.105.0/24 [110/20] via 192.168.12.2, 00:06:49, Ethernet0/0　//OSPF外部経路

O E2 192.168.106.0/24 [110/20] via 192.168.12.2, 00:06:49, Ethernet0/0　//OSPF外部経路

O E2 192.168.107.0/24 [110/20] via 192.168.12.2, 00:06:49, Ethernet0/0　//OSPF外部経路

O E2 192.168.108.0/24 [110/20] via 192.168.12.2, 00:06:49, Ethernet0/0　//OSPF外部経路

O E2 192.168.109.0/24 [110/20] via 192.168.12.2, 00:06:49, Ethernet0/0　//OSPF外部経路

O E2 192.168.110.0/24 [110/20] via 192.168.12.2, 00:06:49, Ethernet0/0　//OSPF外部経路

R2#sh ip route ospf

Gateway of last resort is not set

1.0.0.0/32 is subnetted, 1 subnets

O 1.1.1.1 [110/11] via 192.168.12.1, 00:06:57, Ethernet0/0

3.0.0.0/32 is subnetted, 1 subnets

O 3.3.3.3 [110/11] via 192.168.23.3, 00:06:57, Ethernet0/1

172.16.0.0/32 is subnetted, 10 subnets

O 172.16.1.3 [110/11] via 192.168.23.3, 00:06:57, Ethernet0/1

O 172.16.2.3 [110/11] via 192.168.23.3, 00:06:57, Ethernet0/1

O 172.16.3.3 [110/11] via 192.168.23.3, 00:06:57, Ethernet0/1

O 172.16.4.3 [110/11] via 192.168.23.3, 00:06:57, Ethernet0/1

O 172.16.5.3 [110/11] via 192.168.23.3, 00:06:57, Ethernet0/1

O 172.16.6.3 [110/11] via 192.168.23.3, 00:06:57, Ethernet0/1

O 172.16.7.3 [110/11] via 192.168.23.3, 00:06:57, Ethernet0/1

O 172.16.8.3 [110/11] via 192.168.23.3, 00:06:57, Ethernet0/1

O 172.16.9.3 [110/11] via 192.168.23.3, 00:06:57, Ethernet0/1

O 172.16.10.3 [110/11] via 192.168.23.3, 00:06:57, Ethernet0/1

O E2 192.168.101.0/24 [110/20] via 192.168.23.3, 00:06:57, Ethernet0/1　//OSPF外部経路

O E2 192.168.102.0/24 [110/20] via 192.168.23.3, 00:06:57, Ethernet0/1　//OSPF外部経路

O E2 192.168.103.0/24 [110/20] via 192.168.23.3, 00:06:57, Ethernet0/1　//OSPF外部経路

O E2 192.168.104.0/24 [110/20] via 192.168.23.3, 00:06:57, Ethernet0/1　//OSPF外部経路

O E2 192.168.105.0/24 [110/20] via 192.168.23.3, 00:06:57, Ethernet0/1　//OSPF外部経路

O E2 192.168.106.0/24 [110/20] via 192.168.23.3, 00:06:57, Ethernet0/1　//OSPF外部経路

O E2 192.168.107.0/24 [110/20] via 192.168.23.3, 00:06:57, Ethernet0/1　//OSPF外部経路

O E2 192.168.108.0/24 [110/20] via 192.168.23.3, 00:06:57, Ethernet0/1　//OSPF外部経路

O E2 192.168.109.0/24 [110/20] via 192.168.23.3, 00:06:57, Ethernet0/1　//OSPF外部経路

O E2 192.168.110.0/24 [110/20] via 192.168.23.3, 00:06:57, Ethernet0/1　//OSPF外部経路

R3#sh ip route ospf

Gateway of last resort is not set

1.0.0.0/32 is subnetted, 1 subnets

O IA 1.1.1.1 [110/21] via 192.168.23.2, 00:06:59, Ethernet0/1

2.0.0.0/32 is subnetted, 1 subnets

O IA 2.2.2.2 [110/11] via 192.168.23.2, 00:06:59, Ethernet0/1

O IA 192.168.12.0/24 [110/20] via 192.168.23.2, 00:06:59, Ethernet0/1

②設定変更(Maximum-prefix)

(1)R3にてMaximum-prefixを5に設定する。

R3(config)#router ospf 1

3(config-router)#redistribute maximum-prefix 5

※数秒後、以下のメッセージが出力される。

*May 5 23:54:19.825: %IPRT-4-REDIST_THR_PFX: Redistribution prefix threshold has been reached "ospf 1" - 3 prefixes

*May 5 23:54:19.825: %IPRT-4-REDIST_MAX_PFX: Redistribution prefix limit has been reached "ospf 1" - 5 prefixes

(2)R3設定確認

R3#show ip ospf | include Maximum limit

Maximum limit of redistributed prefixes 5

(3)R2 ルーティング確認&OSPFデータベース確認
R3でのMaximum-prefixにより、OSPF外部経路の一部(192.168.106~110)が広告されていない事及びLSAを受信していないことを確認する。

R2#sh ip route ospf

Gateway of last resort is not set

1.0.0.0/32 is subnetted, 1 subnets

O 1.1.1.1 [110/11] via 192.168.12.1, 00:13:14, Ethernet0/0

3.0.0.0/32 is subnetted, 1 subnets

O 3.3.3.3 [110/11] via 192.168.23.3, 00:13:14, Ethernet0/1

172.16.0.0/32 is subnetted, 10 subnets

O 172.16.1.3 [110/11] via 192.168.23.3, 00:13:14, Ethernet0/1

O 172.16.2.3 [110/11] via 192.168.23.3, 00:13:14, Ethernet0/1

O 172.16.3.3 [110/11] via 192.168.23.3, 00:13:14, Ethernet0/1

O 172.16.4.3 [110/11] via 192.168.23.3, 00:13:14, Ethernet0/1

O 172.16.5.3 [110/11] via 192.168.23.3, 00:13:14, Ethernet0/1

O 172.16.6.3 [110/11] via 192.168.23.3, 00:13:14, Ethernet0/1

O 172.16.7.3 [110/11] via 192.168.23.3, 00:13:14, Ethernet0/1

O 172.16.8.3 [110/11] via 192.168.23.3, 00:13:14, Ethernet0/1

O 172.16.9.3 [110/11] via 192.168.23.3, 00:13:14, Ethernet0/1

O 172.16.10.3 [110/11] via 192.168.23.3, 00:13:14, Ethernet0/1

O E2 192.168.101.0/24 [110/20] via 192.168.23.3, 00:02:54, Ethernet0/1

O E2 192.168.102.0/24 [110/20] via 192.168.23.3, 00:02:54, Ethernet0/1

O E2 192.168.103.0/24 [110/20] via 192.168.23.3, 00:02:54, Ethernet0/1

O E2 192.168.104.0/24 [110/20] via 192.168.23.3, 00:02:54, Ethernet0/1

O E2 192.168.105.0/24 [110/20] via 192.168.23.3, 00:02:54, Ethernet0/1
///OSPF外部経路(106~110)が広告されていない

R2#show ip ospf database | begin Type-5

Type-5 AS External Link States

Link ID ADV Router Age Seq# Checksum Tag

192.168.101.0 3.3.3.3 247 0x80000001 0x008045 0

192.168.102.0 3.3.3.3 247 0x80000001 0x00754F 0

192.168.103.0 3.3.3.3 247 0x80000001 0x006A59 0

192.168.104.0 3.3.3.3 247 0x80000001 0x005F63 0

192.168.105.0 3.3.3.3 247 0x80000001 0x00546D 0
///OSPF外部経路(106~110)に関連するLSAが受信できていない。

(4)R3にてMaximum-prefixを5でwarning-onlyを有効にする。

R3(config)#router ospf 1

R3(config-router)#redistribute maximum-prefix 5 warning-only

※数秒後、以下のメッセージが出力される。

*May 6 00:00:00.522: %IPRT-4-REDIST_THR_PFX: Redistribution prefix threshold has been reached "ospf 1" - 3 prefixes

*May 6 00:00:00.523: %IPRT-4-REDIST_MAX_PFX: Redistribution prefix limit has been reached "ospf 1" - 5 prefixes

(5)R3設定確認

R3#show ip ospf | include Maximum limit　　//

Maximum limit of redistributed prefixes 5 (warning-only)

(6)R2 ルーティング確認&OSPFデータベース確認
R3でのMaximum-prefix(警告のみ)により、OSPF外部経路の一部(192.168.106~110)が広告されている事及びLSAを受信していることを確認する。

R2#sh ip route ospf

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

1.0.0.0/32 is subnetted, 1 subnets

O 1.1.1.1 [110/11] via 192.168.12.1, 00:19:05, Ethernet0/0

3.0.0.0/32 is subnetted, 1 subnets

O 3.3.3.3 [110/11] via 192.168.23.3, 00:19:05, Ethernet0/1

172.16.0.0/32 is subnetted, 10 subnets

O 172.16.1.3 [110/11] via 192.168.23.3, 00:19:05, Ethernet0/1

O 172.16.2.3 [110/11] via 192.168.23.3, 00:19:05, Ethernet0/1

O 172.16.3.3 [110/11] via 192.168.23.3, 00:19:05, Ethernet0/1

O 172.16.4.3 [110/11] via 192.168.23.3, 00:19:05, Ethernet0/1

O 172.16.5.3 [110/11] via 192.168.23.3, 00:19:05, Ethernet0/1

O 172.16.6.3 [110/11] via 192.168.23.3, 00:19:05, Ethernet0/1

O 172.16.7.3 [110/11] via 192.168.23.3, 00:19:05, Ethernet0/1

O 172.16.8.3 [110/11] via 192.168.23.3, 00:19:05, Ethernet0/1

O 172.16.9.3 [110/11] via 192.168.23.3, 00:19:05, Ethernet0/1

O 172.16.10.3 [110/11] via 192.168.23.3, 00:19:05, Ethernet0/1

O E2 192.168.101.0/24 [110/20] via 192.168.23.3, 00:03:04, Ethernet0/1

O E2 192.168.102.0/24 [110/20] via 192.168.23.3, 00:03:04, Ethernet0/1

O E2 192.168.103.0/24 [110/20] via 192.168.23.3, 00:03:04, Ethernet0/1

O E2 192.168.104.0/24 [110/20] via 192.168.23.3, 00:03:04, Ethernet0/1

O E2 192.168.105.0/24 [110/20] via 192.168.23.3, 00:03:04, Ethernet0/1

O E2 192.168.106.0/24 [110/20] via 192.168.23.3, 00:03:04, Ethernet0/1

O E2 192.168.107.0/24 [110/20] via 192.168.23.3, 00:03:04, Ethernet0/1

O E2 192.168.108.0/24 [110/20] via 192.168.23.3, 00:03:04, Ethernet0/1

O E2 192.168.109.0/24 [110/20] via 192.168.23.3, 00:03:04, Ethernet0/1

O E2 192.168.110.0/24 [110/20] via 192.168.23.3, 00:03:04, Ethernet0/1

R2#show ip ospf database | begin Type-5

Type-5 AS External Link States

Link ID ADV Router Age Seq# Checksum Tag

192.168.101.0 3.3.3.3 139 0x80000001 0x008045 0

192.168.102.0 3.3.3.3 139 0x80000001 0x00754F 0

192.168.103.0 3.3.3.3 139 0x80000001 0x006A59 0

192.168.104.0 3.3.3.3 139 0x80000001 0x005F63 0

192.168.105.0 3.3.3.3 139 0x80000001 0x00546D 0

192.168.106.0 3.3.3.3 139 0x80000001 0x004977 0

192.168.107.0 3.3.3.3 139 0x80000001 0x003E81 0

192.168.108.0 3.3.3.3 139 0x80000001 0x00338B 0

192.168.109.0 3.3.3.3 139 0x80000001 0x002895 0

192.168.110.0 3.3.3.3 139 0x80000001 0x001D9F 0

③設定変更(max-lsa)

(1)R3にてmax-lsaを10に設定する。

R2(config)#router ospf 1

R2(config-router)#max-lsa 10 reset-time 30

※数秒後、以下のメッセージが出力される。

May 15 07:20:34.133: %OSPF-4-OSPF_MAX_LSA_THR: Threshold for maximum number of non self-generated LSA has been reached "ospf 1" - 7 LSAs

May 15 07:20:34.133: %OSPF-4-OSPF_MAX_LSA: Maximum number of non self-generated LSA has been exceeded "ospf 1" - 14 LSAs

(2)R3設定確認

R2#show ip ospf | section LSA allowed

Maximum number of non self-generated LSA allowed 10

Current number of non self-generated LSA 0

Threshold for warning message 75%

Ignore-time 5 minutes, reset-time 30 minutes　　//reset-timeが30秒であること

Ignore-count allowed 5, current ignore-count 1

Ignoring all neighbors due to max-lsa limit, tme remaining: 00:03:20

(3)R1 ルーティング確認&OSPFネイバー確認
R2にてLSA最大上限数を超過している為、OSPF関連経路を全て受信していない事及びOSPFネイバーが解消されている事を確認する。

R1#sh ip route ospf

Gateway of last resort is not set

R1#show ip ospf neighbor

R1#

(4)R3にてmax-lsaを10でwarning-onlyを有効にする。

R3(config)#router ospf 1

R2(config-router)#max-lsa 10 warning-only

※数秒後、以下のメッセージが出力される。

May 15 07:25:49.403: %OSPF-4-OSPF_MAX_LSA_THR: Threshold for maximum number of non self-generated LSA has been reached "ospf 1" - 7 LSAs

May 15 07:25:49.403: %OSPF-4-OSPF_MAX_LSA: Maximum number of non self-generated LSA has been exceeded "ospf 1" - 11 LSAs

(5)R3設定確認

R2#show ip ospf | section LSA allowed

Maximum number of non self-generated LSA allowed 10 (warning-only)

Current number of non self-generated LSA 14

Threshold for warning message 75%

(6)R1 ルーティング確認&OSPFネイバー確認
R3でのMax-lsa(警告のみ)により、OSPF関連経路が広告されている事及びネイバーが確立していることを確認する。

R1#show ip route ospf

Gateway of last resort is not set

2.0.0.0/32 is subnetted, 1 subnets

O 2.2.2.2 [110/11] via 192.168.12.2, 00:01:27, Ethernet0/0

3.0.0.0/32 is subnetted, 1 subnets

O IA 3.3.3.3 [110/21] via 192.168.12.2, 00:01:22, Ethernet0/0

172.16.0.0/32 is subnetted, 10 subnets

O IA 172.16.1.3 [110/21] via 192.168.12.2, 00:01:22, Ethernet0/0

O IA 172.16.2.3 [110/21] via 192.168.12.2, 00:01:22, Ethernet0/0

O IA 172.16.3.3 [110/21] via 192.168.12.2, 00:01:22, Ethernet0/0

O IA 172.16.4.3 [110/21] via 192.168.12.2, 00:01:22, Ethernet0/0

O IA 172.16.5.3 [110/21] via 192.168.12.2, 00:01:22, Ethernet0/0

O IA 172.16.6.3 [110/21] via 192.168.12.2, 00:01:22, Ethernet0/0

O IA 172.16.7.3 [110/21] via 192.168.12.2, 00:01:22, Ethernet0/0

O IA 172.16.8.3 [110/21] via 192.168.12.2, 00:01:22, Ethernet0/0

O IA 172.16.9.3 [110/21] via 192.168.12.2, 00:01:22, Ethernet0/0

O IA 172.16.10.3 [110/21] via 192.168.12.2, 00:01:22, Ethernet0/0

O IA 192.168.23.0/24 [110/20] via 192.168.12.2, 00:01:22, Ethernet0/0

O E2 192.168.101.0/24 [110/20] via 192.168.12.2, 00:01:22, Ethernet0/0

O E2 192.168.102.0/24 [110/20] via 192.168.12.2, 00:01:22, Ethernet0/0

O E2 192.168.103.0/24 [110/20] via 192.168.12.2, 00:01:22, Ethernet0/0

O E2 192.168.104.0/24 [110/20] via 192.168.12.2, 00:01:22, Ethernet0/0

O E2 192.168.105.0/24 [110/20] via 192.168.12.2, 00:01:22, Ethernet0/0

O E2 192.168.106.0/24 [110/20] via 192.168.12.2, 00:01:22, Ethernet0/0

O E2 192.168.107.0/24 [110/20] via 192.168.12.2, 00:01:22, Ethernet0/0

O E2 192.168.108.0/24 [110/20] via 192.168.12.2, 00:01:22, Ethernet0/0

O E2 192.168.109.0/24 [110/20] via 192.168.12.2, 00:01:22, Ethernet0/0

O E2 192.168.110.0/24 [110/20] via 192.168.12.2, 00:01:22, Ethernet0/0

R1#show ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface

2.2.2.2 1 FULL/BDR 00:00:36 192.168.12.2 Ethernet0/0

目指せ!!CCIE

STP

2017年5月30日火曜日

OSPF データベース上限設定 ( max-lsa / maximum-prefix )

◾️OSPF データベース上限設定 ( max-lsa / maximum-prefix )

◾️検証環境図

①検証環境　事前設定確認

②設定変更(Maximum-prefix)

STP

2017年5月30日火曜日

OSPF データベース上限設定 ( max-lsa / maximum-prefix )

◾️OSPF データベース上限設定 ( max-lsa / maximum-prefix )

◾️検証環境図

①検証環境 事前設定確認

②設定変更(Maximum-prefix)

①検証環境　事前設定確認