Cisco CSR1000v（IOS XE）でOTV検証 3/3
目次
はじめに
第二回目の検証では、『2サイトの冗長構成』によるOTV検証を実施しました。今回は1サイト増設し3サイトで検証します。
第三回目の検証（ラストの検証）
検証概要
使用する機器と構成は下記のとおりです。
| 用途 | ホスト名 | 機種 | OS Version |
|---|---|---|---|
| エッジデバイス | CSR1000ｖ-01/02/03/04/05/06 | CSR1000v | 03.16.06.S |
| – | VyOS-01/02 | VyOS | 1.3-rolling-202006120643 |
| クライアント | N9Kv-V9-01/02/03 | Nexus 9000v | 9.2(3) |
■要件は下記の通りとします。
- サイト数はSiteAとSiteBとSiteCの3サイトとする。
- CSR1000v-01/04とCSR1000v-02/05とCSR1000v-03/06にてOTVを構成する。
- 各サイトではVlan100とVlan101のセグメントを用意する。
- アンダーレイネットワークのVlan10～15とVlan16間はVyOS-01でOSPFルーティングをする。
なお、第一回目の記事でも説明しましたが、CSR1000vのインタフェースのMTUサイズはデフォルト値から変更してます。※参考：『Cisco Nexus 7000 シリーズ NX-OS OTV 設定ガイド』の「OTV の注意事項と制約事項」参照。
設定内容
OTVを構成するエッジデバイスのコンフィグ
OTVに関連する設定箇所と、アンダーレイネットワークのrouter ospfを記載します。
CSR1000v-01/04/02/05は第二回目の時と同じコンフィグです。今回、CSR1000v-03/06が追加されたことになります。
CSR1000v-01#show running-config
＜省略＞
!
hostname CSR1000v-01
!
＜省略＞
!
otv site bridge-domain 100
otv isis hello-interval 3
!
otv site-identifier 0000.0000.0001
＜省略＞
!
interface Overlay1
description Overlay Network
no ip address
otv join-interface GigabitEthernet2.11
otv vpn-name Site-A
otv adjacency-server unicast-only
otv isis hello-interval 3
service instance 100 ethernet
encapsulation dot1q 100
bridge-domain 100
!
service instance 101 ethernet
encapsulation dot1q 101
bridge-domain 101
!
!
＜省略＞
!
interface GigabitEthernet2
mtu 9000
no ip address
no ip redirects
negotiation auto
!
interface GigabitEthernet2.11
description OTV Layer 3 to Distribution
encapsulation dot1Q 11
ip address 192.168.11.1 255.255.255.0
no ip redirects
no ip proxy-arp
ip ospf network point-to-point
ip ospf hello-interval 1
!
interface GigabitEthernet3
mtu 9216
no ip address
negotiation auto
service instance 100 ethernet
encapsulation dot1q 100
bridge-domain 100
!
service instance 101 ethernet
encapsulation dot1q 101
bridge-domain 101
!
!
＜省略＞
!
router ospf 1
router-id 192.168.11.1
timers throttle spf 5 1000 1000
network 192.168.11.0 0.0.0.255 area 0
!
＜省略＞
CSR1000v-01#CSR1000v-04#show running-config
＜省略＞
!
hostname CSR1000v-04
!
＜省略＞
!
otv site bridge-domain 100
otv isis hello-interval 3
!
otv site-identifier 0000.0000.0001
＜省略＞
!
interface Overlay1
description Overlay Network
no ip address
otv join-interface GigabitEthernet2.14
otv vpn-name Site-A
otv use-adjacency-server 192.168.11.1 192.168.12.1 unicast-only
otv isis hello-interval 3
service instance 100 ethernet
encapsulation dot1q 100
bridge-domain 100
!
service instance 101 ethernet
encapsulation dot1q 101
bridge-domain 101
!
!
＜省略＞
!
interface GigabitEthernet2
mtu 9000
no ip address
no ip redirects
negotiation auto
!
interface GigabitEthernet2.14
description OTV Layer 3 to Distribution
encapsulation dot1Q 14
ip address 192.168.14.1 255.255.255.0
no ip redirects
no ip proxy-arp
ip ospf network point-to-point
ip ospf hello-interval 1
!
interface GigabitEthernet3
mtu 9216
no ip address
negotiation auto
service instance 100 ethernet
encapsulation dot1q 100
bridge-domain 100
!
service instance 101 ethernet
encapsulation dot1q 101
bridge-domain 101
!
!
＜省略＞
!
router ospf 1
router-id 192.168.14.1
timers throttle spf 5 1000 1000
network 192.168.14.0 0.0.0.255 area 0
!
＜省略＞
CSR1000v-04#CSR1000v-02#show running-config
＜省略＞
!
hostname CSR1000v-02
!
＜省略＞
!
otv site bridge-domain 100
otv isis hello-interval 3
!
otv site-identifier 0000.0000.0002
＜省略＞
!
interface Overlay1
description Overlay Network
no ip address
otv join-interface GigabitEthernet2.12
otv vpn-name Site-B
otv use-adjacency-server 192.168.11.1 unicast-only
otv adjacency-server unicast-only
otv isis hello-interval 3
service instance 100 ethernet
encapsulation dot1q 100
bridge-domain 100
!
service instance 101 ethernet
encapsulation dot1q 101
bridge-domain 101
!
!
＜省略＞
!
interface GigabitEthernet2
mtu 9000
no ip address
no ip redirects
negotiation auto
!
interface GigabitEthernet2.12
description OTV Layer 3 to Distribution
encapsulation dot1Q 12
ip address 192.168.12.1 255.255.255.0
no ip redirects
no ip proxy-arp
ip ospf network point-to-point
ip ospf hello-interval 1
!
interface GigabitEthernet3
mtu 9216
no ip address
negotiation auto
service instance 100 ethernet
encapsulation dot1q 100
bridge-domain 100
!
service instance 101 ethernet
encapsulation dot1q 101
bridge-domain 101
!
!
＜省略＞
!
router ospf 1
router-id 192.168.12.1
timers throttle spf 5 1000 1000
network 192.168.12.0 0.0.0.255 area 0
!
＜省略＞
CSR1000v-02#CSR1000v-05#show running-config
＜省略＞
!
hostname CSR1000v-05
!
＜省略＞
!
otv site bridge-domain 100
otv isis hello-interval 3
!
otv site-identifier 0000.0000.0002
＜省略＞
!
interface Overlay1
description Overlay Network
no ip address
otv join-interface GigabitEthernet2.15
otv vpn-name Site-B
otv use-adjacency-server 192.168.11.1 192.168.12.1 unicast-only
otv isis hello-interval 3
service instance 100 ethernet
encapsulation dot1q 100
bridge-domain 100
!
service instance 101 ethernet
encapsulation dot1q 101
bridge-domain 101
!
!
＜省略＞
!
interface GigabitEthernet2
mtu 9000
no ip address
no ip redirects
negotiation auto
!
interface GigabitEthernet2.15
description OTV Layer 3 to Distribution
encapsulation dot1Q 15
ip address 192.168.15.1 255.255.255.0
no ip redirects
no ip proxy-arp
ip ospf network point-to-point
ip ospf hello-interval 1
!
interface GigabitEthernet3
mtu 9216
no ip address
negotiation auto
service instance 100 ethernet
encapsulation dot1q 100
bridge-domain 100
!
service instance 101 ethernet
encapsulation dot1q 101
bridge-domain 101
!
!
＜省略＞
!
router ospf 1
router-id 192.168.15.1
timers throttle spf 5 1000 1000
network 192.168.15.0 0.0.0.255 area 0
!
＜省略＞
CSR1000v-05#CSR1000v-03#show running-config
＜省略＞
!
hostname CSR1000v-03
!
＜省略＞
!
otv site bridge-domain 100
otv isis hello-interval 3
!
otv site-identifier 0000.0000.0003
＜省略＞
!
interface Overlay1
description Overlay Network
no ip address
otv join-interface GigabitEthernet2.13
otv vpn-name Site-C
otv use-adjacency-server 192.168.11.1 unicast-only
otv isis hello-interval 3
service instance 100 ethernet
encapsulation dot1q 100
bridge-domain 100
!
service instance 101 ethernet
encapsulation dot1q 101
bridge-domain 101
!
!
＜省略＞
!
interface GigabitEthernet2
mtu 9000
no ip address
no ip redirects
negotiation auto
!
interface GigabitEthernet2.13
description OTV Layer 3 to Distribution
encapsulation dot1Q 13
ip address 192.168.13.1 255.255.255.0
no ip redirects
no ip proxy-arp
ip ospf network point-to-point
ip ospf hello-interval 1
!
interface GigabitEthernet3
mtu 9216
no ip address
negotiation auto
service instance 100 ethernet
encapsulation dot1q 100
bridge-domain 100
!
service instance 101 ethernet
encapsulation dot1q 101
bridge-domain 101
!
!
＜省略＞
!
router ospf 1
router-id 192.168.13.1
timers throttle spf 5 1000 1000
network 192.168.13.0 0.0.0.255 area 0
!
＜省略＞
CSR1000v-03#CSR1000v-06#show running-config
＜省略＞
!
hostname CSR1000v-06
!
＜省略＞
!
otv site bridge-domain 100
otv isis hello-interval 3
!
otv site-identifier 0000.0000.0003
＜省略＞
!
interface Overlay1
description Overlay Network
no ip address
otv join-interface GigabitEthernet2.16
otv vpn-name Site-C
otv use-adjacency-server 192.168.11.1 192.168.12.1 unicast-only
otv isis hello-interval 3
service instance 100 ethernet
encapsulation dot1q 100
bridge-domain 100
!
service instance 101 ethernet
encapsulation dot1q 101
bridge-domain 101
!
!
＜省略＞
!
interface GigabitEthernet2
mtu 9000
no ip address
no ip redirects
negotiation auto
!
interface GigabitEthernet2.16
description OTV Layer 3 to Distribution
encapsulation dot1Q 16
ip address 192.168.16.1 255.255.255.0
no ip redirects
no ip proxy-arp
ip ospf network point-to-point
ip ospf hello-interval 1
!
interface GigabitEthernet3
mtu 9216
no ip address
negotiation auto
service instance 100 ethernet
encapsulation dot1q 100
bridge-domain 100
!
service instance 101 ethernet
encapsulation dot1q 101
bridge-domain 101
!
!
＜省略＞
!
router ospf 1
router-id 192.168.16.1
timers throttle spf 5 1000 1000
network 192.168.16.0 0.0.0.255 area 0
!
＜省略＞
CSR1000v-06#アンダーレイのVyOSのコンフィグ
次にVyOSです。第二回目の検証から、vif13とvif16の作成、及びOSPFネットワークにSiteC向けのセグメントを追加しました。
vyos@VyOS-01# show
interfaces {
＜省略＞
ethernet eth1 {
hw-id 00:0c:29:9c:fb:3f
vif 99 {
address 192.168.99.1/24
ip {
ospf {
dead-interval 40
hello-interval 10
network point-to-point
priority 1
retransmit-interval 5
transmit-delay 1
}
}
}
}
ethernet eth2 {
hw-id 00:0c:29:9c:fb:49
mtu 9000
vif 11 {
address 192.168.11.254/24
ip {
ospf {
dead-interval 4
hello-interval 1
network point-to-point
priority 1
retransmit-interval 5
transmit-delay 1
}
}
mtu 9000
}
vif 12 {
address 192.168.12.254/24
ip {
ospf {
dead-interval 4
hello-interval 1
network point-to-point
priority 1
retransmit-interval 5
transmit-delay 1
}
}
mtu 9000
}
vif 13 {
address 192.168.13.254/24
ip {
ospf {
dead-interval 4
hello-interval 1
network point-to-point
priority 1
retransmit-interval 5
transmit-delay 1
}
}
mtu 9000
}
}
＜省略＞
}
protocols {
ospf {
area 0 {
network 192.168.11.0/24
network 192.168.12.0/24
network 192.168.13.0/24
network 192.168.99.0/24
}
}
＜省略＞
vyos@VyOS-01#vyos@VyOS-02# show
interfaces {
＜省略＞
ethernet eth1 {
hw-id 00:0c:29:96:75:4d
vif 99 {
address 192.168.99.2/24
ip {
ospf {
dead-interval 40
hello-interval 10
network point-to-point
priority 1
retransmit-interval 5
transmit-delay 1
}
}
}
}
ethernet eth2 {
hw-id 00:0c:29:96:75:57
mtu 9000
vif 14 {
address 192.168.14.254/24
ip {
ospf {
dead-interval 4
hello-interval 1
network point-to-point
priority 1
retransmit-interval 5
transmit-delay 1
}
}
mtu 9000
}
vif 15 {
address 192.168.15.254/24
ip {
ospf {
dead-interval 4
hello-interval 1
network point-to-point
priority 1
retransmit-interval 5
transmit-delay 1
}
}
mtu 9000
}
vif 16 {
address 192.168.16.254/24
ip {
ospf {
dead-interval 4
hello-interval 1
network point-to-point
priority 1
retransmit-interval 5
transmit-delay 1
}
}
mtu 9000
}
}
＜省略＞
}
protocols {
ospf {
area 0 {
network 192.168.14.0/24
network 192.168.15.0/24
network 192.168.16.0/24
network 192.168.99.0/24
}
}
＜省略＞
vyos@VyOS-02#クライアントのN9Kvのコンフィグ
次にクライアントとして機能するN9Kvのコンフィグです。N9Kv-V9-01/02は第二回目から変更なしです。N9Kv-V9-03を追加しました。
N9Kv-V9-01# show running-config
＜省略＞
vlan 1,100-101
＜省略＞
interface Vlan1
interface Vlan100
no shutdown
no ip redirects
ip address 192.168.100.1/24
interface Vlan101
no shutdown
no ip redirects
ip address 192.168.101.1/24
interface Ethernet1/1
switchport mode trunk
switchport trunk allowed vlan 100-101
＜省略＞
N9Kv-V9-01#N9Kv-V9-02# show running-config
＜省略＞
vlan 1,100-101
＜省略＞
interface Vlan1
interface Vlan100
no shutdown
no ip redirects
ip address 192.168.100.2/24
interface Vlan101
no shutdown
no ip redirects
ip address 192.168.101.2/24
interface Ethernet1/1
switchport mode trunk
switchport trunk allowed vlan 100-101
＜省略＞
N9Kv-V9-02#N9Kv-V9-03# show running-config
＜省略＞
vlan 1,100-101
＜省略＞
interface Vlan1
interface Vlan100
no shutdown
no ip redirects
ip address 192.168.100.3/24
interface Vlan101
no shutdown
no ip redirects
ip address 192.168.101.3/24
interface Ethernet1/1
switchport mode trunk
switchport trunk allowed vlan 100-101
＜省略＞
N9Kv-V9-02#設定は以上です。
ステータス確認
アンダーレイネットワークのルーティング情報
まずはアンダーレイネットワークが正常に組めていることを確認します。各ルータは、全エッジデバイスへのルート情報を持っていることを確認します。
CSR1000v-01#show ip route
＜省略＞
192.168.11.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.11.0/24 is directly connected, GigabitEthernet2.11
L 192.168.11.1/32 is directly connected, GigabitEthernet2.11
O 192.168.12.0/24
[110/11] via 192.168.11.254, 00:17:35, GigabitEthernet2.11
O 192.168.13.0/24
[110/11] via 192.168.11.254, 00:17:35, GigabitEthernet2.11
O 192.168.14.0/24
[110/21] via 192.168.11.254, 00:17:10, GigabitEthernet2.11
O 192.168.15.0/24
[110/21] via 192.168.11.254, 00:17:10, GigabitEthernet2.11
O 192.168.16.0/24
[110/21] via 192.168.11.254, 00:17:10, GigabitEthernet2.11
O 192.168.99.0/24
[110/11] via 192.168.11.254, 00:17:35, GigabitEthernet2.11
CSR1000v-01#CSR1000v-04#show ip route
＜省略＞
O 192.168.11.0/24
[110/21] via 192.168.14.254, 00:17:10, GigabitEthernet2.14
O 192.168.12.0/24
[110/21] via 192.168.14.254, 00:17:10, GigabitEthernet2.14
O 192.168.13.0/24
[110/21] via 192.168.14.254, 00:17:10, GigabitEthernet2.14
192.168.14.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.14.0/24 is directly connected, GigabitEthernet2.14
L 192.168.14.1/32 is directly connected, GigabitEthernet2.14
O 192.168.15.0/24
[110/11] via 192.168.14.254, 00:17:21, GigabitEthernet2.14
O 192.168.16.0/24
[110/11] via 192.168.14.254, 00:17:21, GigabitEthernet2.14
O 192.168.99.0/24
[110/11] via 192.168.14.254, 00:17:21, GigabitEthernet2.14
CSR1000v-04#CSR1000v-02#show ip route
＜省略＞
O 192.168.11.0/24
[110/11] via 192.168.12.254, 00:17:36, GigabitEthernet2.12
192.168.12.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.12.0/24 is directly connected, GigabitEthernet2.12
L 192.168.12.1/32 is directly connected, GigabitEthernet2.12
O 192.168.13.0/24
[110/11] via 192.168.12.254, 00:17:36, GigabitEthernet2.12
O 192.168.14.0/24
[110/21] via 192.168.12.254, 00:17:11, GigabitEthernet2.12
O 192.168.15.0/24
[110/21] via 192.168.12.254, 00:17:11, GigabitEthernet2.12
O 192.168.16.0/24
[110/21] via 192.168.12.254, 00:17:11, GigabitEthernet2.12
O 192.168.99.0/24
[110/11] via 192.168.12.254, 00:17:36, GigabitEthernet2.12
CSR1000v-02#CSR1000v-05#show ip route
＜省略＞
O 192.168.11.0/24
[110/21] via 192.168.15.254, 00:17:10, GigabitEthernet2.15
O 192.168.12.0/24
[110/21] via 192.168.15.254, 00:17:10, GigabitEthernet2.15
O 192.168.13.0/24
[110/21] via 192.168.15.254, 00:17:10, GigabitEthernet2.15
O 192.168.14.0/24
[110/11] via 192.168.15.254, 00:17:21, GigabitEthernet2.15
192.168.15.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.15.0/24 is directly connected, GigabitEthernet2.15
L 192.168.15.1/32 is directly connected, GigabitEthernet2.15
O 192.168.16.0/24
[110/11] via 192.168.15.254, 00:17:21, GigabitEthernet2.15
O 192.168.99.0/24
[110/11] via 192.168.15.254, 00:17:21, GigabitEthernet2.15
CSR1000v-05#CSR1000v-03#show ip route
＜省略＞
O 192.168.11.0/24
[110/11] via 192.168.13.254, 00:17:26, GigabitEthernet2.13
O 192.168.12.0/24
[110/11] via 192.168.13.254, 00:17:26, GigabitEthernet2.13
192.168.13.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.13.0/24 is directly connected, GigabitEthernet2.13
L 192.168.13.1/32 is directly connected, GigabitEthernet2.13
O 192.168.14.0/24
[110/21] via 192.168.13.254, 00:17:11, GigabitEthernet2.13
O 192.168.15.0/24
[110/21] via 192.168.13.254, 00:17:11, GigabitEthernet2.13
O 192.168.16.0/24
[110/21] via 192.168.13.254, 00:17:11, GigabitEthernet2.13
O 192.168.99.0/24
[110/11] via 192.168.13.254, 00:17:26, GigabitEthernet2.13
CSR1000v-03#CSR1000v-06#show ip route
＜省略＞
O 192.168.11.0/24
[110/21] via 192.168.16.254, 00:17:14, GigabitEthernet2.16
O 192.168.12.0/24
[110/21] via 192.168.16.254, 00:17:14, GigabitEthernet2.16
O 192.168.13.0/24
[110/21] via 192.168.16.254, 00:17:14, GigabitEthernet2.16
O 192.168.14.0/24
[110/11] via 192.168.16.254, 00:17:15, GigabitEthernet2.16
O 192.168.15.0/24
[110/11] via 192.168.16.254, 00:17:15, GigabitEthernet2.16
192.168.16.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.16.0/24 is directly connected, GigabitEthernet2.16
L 192.168.16.1/32 is directly connected, GigabitEthernet2.16
O 192.168.99.0/24
[110/11] via 192.168.16.254, 00:17:15, GigabitEthernet2.16
CSR1000v-06#vyos@VyOS-01:~$ show ip route
＜省略＞
O 192.168.11.0/24 [110/10] is directly connected, eth2.11, 00:18:40
C>* 192.168.11.0/24 is directly connected, eth2.11, 00:18:45
O 192.168.12.0/24 [110/10] is directly connected, eth2.12, 00:18:40
C>* 192.168.12.0/24 is directly connected, eth2.12, 00:18:45
O 192.168.13.0/24 [110/10] is directly connected, eth2.13, 00:18:40
C>* 192.168.13.0/24 is directly connected, eth2.13, 00:18:45
O>* 192.168.14.0/24 [110/20] via 192.168.99.2, eth1.99, 00:18:10
O>* 192.168.15.0/24 [110/20] via 192.168.99.2, eth1.99, 00:18:10
O>* 192.168.16.0/24 [110/20] via 192.168.99.2, eth1.99, 00:18:10
O 192.168.99.0/24 [110/10] is directly connected, eth1.99, 00:18:40
C>* 192.168.99.0/24 is directly connected, eth1.99, 00:18:45
vyos@VyOS-01:~$vyos@VyOS-02:~$ show ip route
＜省略＞
O>* 192.168.11.0/24 [110/20] via 192.168.99.1, eth1.99, 00:18:07
O>* 192.168.12.0/24 [110/20] via 192.168.99.1, eth1.99, 00:18:07
O>* 192.168.13.0/24 [110/20] via 192.168.99.1, eth1.99, 00:18:07
O 192.168.14.0/24 [110/10] is directly connected, eth2.14, 00:18:23
C>* 192.168.14.0/24 is directly connected, eth2.14, 00:18:27
O 192.168.15.0/24 [110/10] is directly connected, eth2.15, 00:18:23
C>* 192.168.15.0/24 is directly connected, eth2.15, 00:18:27
O 192.168.16.0/24 [110/10] is directly connected, eth2.16, 00:18:23
C>* 192.168.16.0/24 is directly connected, eth2.16, 00:18:27
O 192.168.99.0/24 [110/10] is directly connected, eth1.99, 00:18:22
C>* 192.168.99.0/24 is directly connected, eth1.99, 00:18:28
vyos@VyOS-02:~$OTVのステータス確認
次にオーバーレイネットワークが正常に組めていることを確認します。特に、「show otv adjacency」で他サイトのエッジデバイスとの接続を確認します。
CSR1000v-01#show otv
Overlay Interface Overlay1
VPN name : Site-A
VPN ID : 1
State : UP
Fwd-capable : Yes
Fwd-ready : Yes
AED-Server : Yes
Backup AED-Server : No
AED Capable : Yes
Join interface(s) : GigabitEthernet2.11
Join IPv4 address : 192.168.11.1
Tunnel interface(s) : Tunnel0
Encapsulation format : GRE/IPv4
Site Bridge-Domain : 100
Capability : Unicast-only
Is Adjacency Server : Yes
Adj Server Configured : No
Prim/Sec Adj Svr(s) : None
CSR1000v-01#
CSR1000v-01#
CSR1000v-01#
CSR1000v-01#show otv site
Site Adjacency Information (Site Bridge-Domain: 100)
Overlay1 Site-Local Adjacencies (Count: 2)
Hostname System ID Last Change Ordinal AED Enabled Status
* CSR1000v-01 001E.E62F.5D00 00:24:52 0 site overlay
CSR1000v-04 001E.E6AD.8500 00:23:26 1 site overlay
CSR1000v-01#
CSR1000v-01#
CSR1000v-01#
CSR1000v-01#show otv adjacency
Overlay Adjacency Database for overlay 1
Hostname System-ID Dest Addr Site-ID Up Time State
CSR1000v-06 001e.f659.2600 192.168.16.1 0000.0000.0003 00:24:31 UP
CSR1000v-04 001e.e6ad.8500 192.168.14.1 0000.0000.0001 00:24:30 UP
CSR1000v-05 001e.e529.5f00 192.168.15.1 0000.0000.0002 00:24:31 UP
CSR1000v-02 001e.bd50.2a00 192.168.12.1 0000.0000.0002 00:24:57 UP
CSR1000v-03 001e.142d.cb00 192.168.13.1 0000.0000.0003 00:24:47 UP
CSR1000v-01#
CSR1000v-01#
CSR1000v-01#
CSR1000v-01#show otv vlan
Key: SI - Service Instance, NA - Non AED, NFC - Not Forward Capable.
Overlay 1 VLAN Configuration Information
Inst VLAN BD Auth ED State Site If(s)
0 100 100 *CSR1000v-01 active Gi3:SI100
0 101 101 CSR1000v-04 inactive(NA) Gi3:SI101
Total VLAN(s): 2
CSR1000v-01#
CSR1000v-01#
CSR1000v-01#
CSR1000v-01#show otv route
Codes: BD - Bridge-Domain, AD - Admin-Distance,
SI - Service Instance, * - Backup Route
OTV Unicast MAC Routing Table for Overlay1
Inst VLAN BD MAC Address AD Owner Next Hops(s)
----------------------------------------------------------
0 100 100 000c.2916.2320 50 ISIS CSR1000v-02
0 100 100 000c.2973.565c 50 ISIS CSR1000v-03
0 100 100 000c.29d4.1d6d 40 BD Eng Gi3:SI100
0 100 100 001e.e529.5fbc 50 ISIS CSR1000v-02
0 100 100 001e.e6ad.85bc 40 BD Eng Gi3:SI100
0 100 100 001e.f659.26bc 50 ISIS CSR1000v-03
0 101 101 000c.2916.2320 50 ISIS CSR1000v-05
0 101 101 000c.2973.565c 50 ISIS CSR1000v-06
0 101 101 001e.142d.cbbc 50 ISIS CSR1000v-06
0 101 101 001e.bd50.2abc 50 ISIS CSR1000v-05
10 unicast routes displayed in Overlay1
----------------------------------------------------------
10 Total Unicast Routes Displayed
CSR1000v-01#CSR1000v-04#show otv
Overlay Interface Overlay1
VPN name : Site-A
VPN ID : 1
State : UP
Fwd-capable : Yes
Fwd-ready : Yes
AED-Server : No
Backup AED-Server : Yes
AED Capable : Yes
Join interface(s) : GigabitEthernet2.14
Join IPv4 address : 192.168.14.1
Tunnel interface(s) : Tunnel0
Encapsulation format : GRE/IPv4
Site Bridge-Domain : 100
Capability : Unicast-only
Is Adjacency Server : No
Adj Server Configured : Yes
Prim/Sec Adj Svr(s) : 192.168.11.1/192.168.12.1
CSR1000v-04#
CSR1000v-04#
CSR1000v-04#
CSR1000v-04#show otv site
Site Adjacency Information (Site Bridge-Domain: 100)
Overlay1 Site-Local Adjacencies (Count: 2)
Hostname System ID Last Change Ordinal AED Enabled Status
CSR1000v-01 001E.E62F.5D00 00:23:41 0 site overlay
* CSR1000v-04 001E.E6AD.8500 00:24:26 1 site overlay
CSR1000v-04#
CSR1000v-04#
CSR1000v-04#
CSR1000v-04#show otv adjacency
Overlay Adjacency Database for overlay 1
Hostname System-ID Dest Addr Site-ID Up Time State
CSR1000v-06 001e.f659.2600 192.168.16.1 0000.0000.0003 00:24:30 UP
CSR1000v-01 001e.e62f.5d00 192.168.11.1 0000.0000.0001 00:24:30 UP
CSR1000v-05 001e.e529.5f00 192.168.15.1 0000.0000.0002 00:24:29 UP
CSR1000v-02 001e.bd50.2a00 192.168.12.1 0000.0000.0002 00:24:31 UP
CSR1000v-03 001e.142d.cb00 192.168.13.1 0000.0000.0003 00:24:30 UP
CSR1000v-04#
CSR1000v-04#
CSR1000v-04#
CSR1000v-04#show otv vlan
Key: SI - Service Instance, NA - Non AED, NFC - Not Forward Capable.
Overlay 1 VLAN Configuration Information
Inst VLAN BD Auth ED State Site If(s)
0 100 100 CSR1000v-01 inactive(NA) Gi3:SI100
0 101 101 *CSR1000v-04 active Gi3:SI101
Total VLAN(s): 2
CSR1000v-04#
CSR1000v-04#
CSR1000v-04#
CSR1000v-04#show otv route
Codes: BD - Bridge-Domain, AD - Admin-Distance,
SI - Service Instance, * - Backup Route
OTV Unicast MAC Routing Table for Overlay1
Inst VLAN BD MAC Address AD Owner Next Hops(s)
----------------------------------------------------------
0 100 100 000c.2916.2320 50 ISIS CSR1000v-02
0 100 100 000c.2973.565c 50 ISIS CSR1000v-03
0 100 100 001e.e529.5fbc 50 ISIS CSR1000v-02
0 100 100 001e.f659.26bc 50 ISIS CSR1000v-03
0 101 101 000c.2916.2320 50 ISIS CSR1000v-05
0 101 101 000c.2973.565c 50 ISIS CSR1000v-06
0 101 101 000c.29d4.1d6d 40 BD Eng Gi3:SI101
0 101 101 001e.142d.cbbc 50 ISIS CSR1000v-06
0 101 101 001e.bd50.2abc 50 ISIS CSR1000v-05
0 101 101 001e.e62f.5dbc 40 BD Eng Gi3:SI101
10 unicast routes displayed in Overlay1
----------------------------------------------------------
10 Total Unicast Routes Displayed
CSR1000v-04#CSR1000v-02#show otv
Overlay Interface Overlay1
VPN name : Site-B
VPN ID : 1
State : UP
Fwd-capable : Yes
Fwd-ready : Yes
AED-Server : Yes
Backup AED-Server : No
AED Capable : Yes
Join interface(s) : GigabitEthernet2.12
Join IPv4 address : 192.168.12.1
Tunnel interface(s) : Tunnel0
Encapsulation format : GRE/IPv4
Site Bridge-Domain : 100
Capability : Unicast-only
Is Adjacency Server : Yes
Adj Server Configured : Yes
Prim/Sec Adj Svr(s) : 192.168.11.1
CSR1000v-02#
CSR1000v-02#
CSR1000v-02#
CSR1000v-02#show otv site
Site Adjacency Information (Site Bridge-Domain: 100)
Overlay1 Site-Local Adjacencies (Count: 2)
Hostname System ID Last Change Ordinal AED Enabled Status
* CSR1000v-02 001E.BD50.2A00 00:24:52 0 site overlay
CSR1000v-05 001E.E529.5F00 00:23:26 1 site overlay
CSR1000v-02#
CSR1000v-02#
CSR1000v-02#
CSR1000v-02#show otv adjacency
Overlay Adjacency Database for overlay 1
Hostname System-ID Dest Addr Site-ID Up Time State
CSR1000v-06 001e.f659.2600 192.168.16.1 0000.0000.0003 00:24:31 UP
CSR1000v-04 001e.e6ad.8500 192.168.14.1 0000.0000.0001 00:24:31 UP
CSR1000v-01 001e.e62f.5d00 192.168.11.1 0000.0000.0001 00:24:57 UP
CSR1000v-05 001e.e529.5f00 192.168.15.1 0000.0000.0002 00:24:31 UP
CSR1000v-03 001e.142d.cb00 192.168.13.1 0000.0000.0003 00:24:47 UP
CSR1000v-02#
CSR1000v-02#
CSR1000v-02#
CSR1000v-02#show otv vlan
Key: SI - Service Instance, NA - Non AED, NFC - Not Forward Capable.
Overlay 1 VLAN Configuration Information
Inst VLAN BD Auth ED State Site If(s)
0 100 100 *CSR1000v-02 active Gi3:SI100
0 101 101 CSR1000v-05 inactive(NA) Gi3:SI101
Total VLAN(s): 2
CSR1000v-02#
CSR1000v-02#
CSR1000v-02#
CSR1000v-02#show otv route
Codes: BD - Bridge-Domain, AD - Admin-Distance,
SI - Service Instance, * - Backup Route
OTV Unicast MAC Routing Table for Overlay1
Inst VLAN BD MAC Address AD Owner Next Hops(s)
----------------------------------------------------------
0 100 100 000c.2916.2320 40 BD Eng Gi3:SI100
0 100 100 000c.2973.565c 50 ISIS CSR1000v-03
0 100 100 000c.29d4.1d6d 50 ISIS CSR1000v-01
0 100 100 001e.e529.5fbc 40 BD Eng Gi3:SI100
0 100 100 001e.e6ad.85bc 50 ISIS CSR1000v-01
0 100 100 001e.f659.26bc 50 ISIS CSR1000v-03
0 101 101 000c.2973.565c 50 ISIS CSR1000v-06
0 101 101 000c.29d4.1d6d 50 ISIS CSR1000v-04
0 101 101 001e.142d.cbbc 50 ISIS CSR1000v-06
0 101 101 001e.e62f.5dbc 50 ISIS CSR1000v-04
10 unicast routes displayed in Overlay1
----------------------------------------------------------
10 Total Unicast Routes Displayed
CSR1000v-02#CSR1000v-05#show otv
Overlay Interface Overlay1
VPN name : Site-B
VPN ID : 1
State : UP
Fwd-capable : Yes
Fwd-ready : Yes
AED-Server : No
Backup AED-Server : Yes
AED Capable : Yes
Join interface(s) : GigabitEthernet2.15
Join IPv4 address : 192.168.15.1
Tunnel interface(s) : Tunnel0
Encapsulation format : GRE/IPv4
Site Bridge-Domain : 100
Capability : Unicast-only
Is Adjacency Server : No
Adj Server Configured : Yes
Prim/Sec Adj Svr(s) : 192.168.11.1/192.168.12.1
CSR1000v-05#
CSR1000v-05#
CSR1000v-05#
CSR1000v-05#show otv site
Site Adjacency Information (Site Bridge-Domain: 100)
Overlay1 Site-Local Adjacencies (Count: 2)
Hostname System ID Last Change Ordinal AED Enabled Status
CSR1000v-02 001E.BD50.2A00 00:23:39 0 site overlay
* CSR1000v-05 001E.E529.5F00 00:24:26 1 site overlay
CSR1000v-05#
CSR1000v-05#
CSR1000v-05#
CSR1000v-05#show otv adjacency
Overlay Adjacency Database for overlay 1
Hostname System-ID Dest Addr Site-ID Up Time State
CSR1000v-06 001e.f659.2600 192.168.16.1 0000.0000.0003 00:24:30 UP
CSR1000v-04 001e.e6ad.8500 192.168.14.1 0000.0000.0001 00:24:29 UP
CSR1000v-01 001e.e62f.5d00 192.168.11.1 0000.0000.0001 00:24:31 UP
CSR1000v-02 001e.bd50.2a00 192.168.12.1 0000.0000.0002 00:24:30 UP
CSR1000v-03 001e.142d.cb00 192.168.13.1 0000.0000.0003 00:24:31 UP
CSR1000v-05#
CSR1000v-05#
CSR1000v-05#
CSR1000v-05#show otv vlan
Key: SI - Service Instance, NA - Non AED, NFC - Not Forward Capable.
Overlay 1 VLAN Configuration Information
Inst VLAN BD Auth ED State Site If(s)
0 100 100 CSR1000v-02 inactive(NA) Gi3:SI100
0 101 101 *CSR1000v-05 active Gi3:SI101
Total VLAN(s): 2
CSR1000v-05#
CSR1000v-05#
CSR1000v-05#
CSR1000v-05#show otv route
Codes: BD - Bridge-Domain, AD - Admin-Distance,
SI - Service Instance, * - Backup Route
OTV Unicast MAC Routing Table for Overlay1
Inst VLAN BD MAC Address AD Owner Next Hops(s)
----------------------------------------------------------
0 100 100 000c.2973.565c 50 ISIS CSR1000v-03
0 100 100 000c.29d4.1d6d 50 ISIS CSR1000v-01
0 100 100 001e.e6ad.85bc 50 ISIS CSR1000v-01
0 100 100 001e.f659.26bc 50 ISIS CSR1000v-03
0 101 101 000c.2916.2320 40 BD Eng Gi3:SI101
0 101 101 000c.2973.565c 50 ISIS CSR1000v-06
0 101 101 000c.29d4.1d6d 50 ISIS CSR1000v-04
0 101 101 001e.142d.cbbc 50 ISIS CSR1000v-06
0 101 101 001e.bd50.2abc 40 BD Eng Gi3:SI101
0 101 101 001e.e62f.5dbc 50 ISIS CSR1000v-04
10 unicast routes displayed in Overlay1
----------------------------------------------------------
10 Total Unicast Routes Displayed
CSR1000v-05#CSR1000v-03#show otv
Overlay Interface Overlay1
VPN name : Site-C
VPN ID : 1
State : UP
Fwd-capable : Yes
Fwd-ready : Yes
AED-Server : Yes
Backup AED-Server : No
AED Capable : Yes
Join interface(s) : GigabitEthernet2.13
Join IPv4 address : 192.168.13.1
Tunnel interface(s) : Tunnel0
Encapsulation format : GRE/IPv4
Site Bridge-Domain : 100
Capability : Unicast-only
Is Adjacency Server : No
Adj Server Configured : Yes
Prim/Sec Adj Svr(s) : 192.168.11.1
CSR1000v-03#
CSR1000v-03#
CSR1000v-03#
CSR1000v-03#show otv site
Site Adjacency Information (Site Bridge-Domain: 100)
Overlay1 Site-Local Adjacencies (Count: 2)
Hostname System ID Last Change Ordinal AED Enabled Status
* CSR1000v-03 001E.142D.CB00 00:24:42 0 site overlay
CSR1000v-06 001E.F659.2600 00:22:56 1 site overlay
CSR1000v-03#
CSR1000v-03#
CSR1000v-03#
CSR1000v-03#show otv adjacency
Overlay Adjacency Database for overlay 1
Hostname System-ID Dest Addr Site-ID Up Time State
CSR1000v-06 001e.f659.2600 192.168.16.1 0000.0000.0003 00:24:31 UP
CSR1000v-04 001e.e6ad.8500 192.168.14.1 0000.0000.0001 00:24:30 UP
CSR1000v-01 001e.e62f.5d00 192.168.11.1 0000.0000.0001 00:24:47 UP
CSR1000v-05 001e.e529.5f00 192.168.15.1 0000.0000.0002 00:24:31 UP
CSR1000v-02 001e.bd50.2a00 192.168.12.1 0000.0000.0002 00:24:47 UP
CSR1000v-03#
CSR1000v-03#
CSR1000v-03#
CSR1000v-03#show otv vlan
Key: SI - Service Instance, NA - Non AED, NFC - Not Forward Capable.
Overlay 1 VLAN Configuration Information
Inst VLAN BD Auth ED State Site If(s)
0 100 100 *CSR1000v-03 active Gi3:SI100
0 101 101 CSR1000v-06 inactive(NA) Gi3:SI101
Total VLAN(s): 2
CSR1000v-03#
CSR1000v-03#
CSR1000v-03#
CSR1000v-03#show otv route
Codes: BD - Bridge-Domain, AD - Admin-Distance,
SI - Service Instance, * - Backup Route
OTV Unicast MAC Routing Table for Overlay1
Inst VLAN BD MAC Address AD Owner Next Hops(s)
----------------------------------------------------------
0 100 100 000c.2916.2320 50 ISIS CSR1000v-02
0 100 100 000c.2973.565c 40 BD Eng Gi3:SI100
0 100 100 000c.29d4.1d6d 50 ISIS CSR1000v-01
0 100 100 001e.e529.5fbc 50 ISIS CSR1000v-02
0 100 100 001e.e6ad.85bc 50 ISIS CSR1000v-01
0 100 100 001e.f659.26bc 40 BD Eng Gi3:SI100
0 101 101 000c.2916.2320 50 ISIS CSR1000v-05
0 101 101 000c.29d4.1d6d 50 ISIS CSR1000v-04
0 101 101 001e.bd50.2abc 50 ISIS CSR1000v-05
0 101 101 001e.e62f.5dbc 50 ISIS CSR1000v-04
10 unicast routes displayed in Overlay1
----------------------------------------------------------
10 Total Unicast Routes Displayed
CSR1000v-03#CSR1000v-06#show otv
Overlay Interface Overlay1
VPN name : Site-C
VPN ID : 1
State : UP
Fwd-capable : Yes
Fwd-ready : Yes
AED-Server : No
Backup AED-Server : Yes
AED Capable : Yes
Join interface(s) : GigabitEthernet2.16
Join IPv4 address : 192.168.16.1
Tunnel interface(s) : Tunnel0
Encapsulation format : GRE/IPv4
Site Bridge-Domain : 100
Capability : Unicast-only
Is Adjacency Server : No
Adj Server Configured : Yes
Prim/Sec Adj Svr(s) : 192.168.11.1/192.168.12.1
CSR1000v-06#
CSR1000v-06#
CSR1000v-06#
CSR1000v-06#show otv site
Site Adjacency Information (Site Bridge-Domain: 100)
Overlay1 Site-Local Adjacencies (Count: 2)
Hostname System ID Last Change Ordinal AED Enabled Status
CSR1000v-03 001E.142D.CB00 00:23:42 0 site overlay
* CSR1000v-06 001E.F659.2600 00:23:56 1 site overlay
CSR1000v-06#
CSR1000v-06#
CSR1000v-06#
CSR1000v-06#show otv adjacency
Overlay Adjacency Database for overlay 1
Hostname System-ID Dest Addr Site-ID Up Time State
CSR1000v-04 001e.e6ad.8500 192.168.14.1 0000.0000.0001 00:24:30 UP
CSR1000v-01 001e.e62f.5d00 192.168.11.1 0000.0000.0001 00:24:31 UP
CSR1000v-05 001e.e529.5f00 192.168.15.1 0000.0000.0002 00:24:30 UP
CSR1000v-02 001e.bd50.2a00 192.168.12.1 0000.0000.0002 00:24:31 UP
CSR1000v-03 001e.142d.cb00 192.168.13.1 0000.0000.0003 00:24:31 UP
CSR1000v-06#
CSR1000v-06#
CSR1000v-06#
CSR1000v-06#show otv vlan
Key: SI - Service Instance, NA - Non AED, NFC - Not Forward Capable.
Overlay 1 VLAN Configuration Information
Inst VLAN BD Auth ED State Site If(s)
0 100 100 CSR1000v-03 inactive(NA) Gi3:SI100
0 101 101 *CSR1000v-06 active Gi3:SI101
Total VLAN(s): 2
CSR1000v-06#
CSR1000v-06#
CSR1000v-06#
CSR1000v-06#show otv route
Codes: BD - Bridge-Domain, AD - Admin-Distance,
SI - Service Instance, * - Backup Route
OTV Unicast MAC Routing Table for Overlay1
Inst VLAN BD MAC Address AD Owner Next Hops(s)
----------------------------------------------------------
0 100 100 000c.2916.2320 50 ISIS CSR1000v-02
0 100 100 000c.29d4.1d6d 50 ISIS CSR1000v-01
0 100 100 001e.e529.5fbc 50 ISIS CSR1000v-02
0 100 100 001e.e6ad.85bc 50 ISIS CSR1000v-01
0 101 101 000c.2916.2320 50 ISIS CSR1000v-05
0 101 101 000c.2973.565c 40 BD Eng Gi3:SI101
0 101 101 000c.29d4.1d6d 50 ISIS CSR1000v-04
0 101 101 001e.142d.cbbc 40 BD Eng Gi3:SI101
0 101 101 001e.bd50.2abc 50 ISIS CSR1000v-05
0 101 101 001e.e62f.5dbc 50 ISIS CSR1000v-04
10 unicast routes displayed in Overlay1
----------------------------------------------------------
10 Total Unicast Routes Displayed
CSR1000v-06#ステータス確認は以上です。
動作確認
疎通確認
クライアントのN9Kv-V9-01から、N9Kv-V9-02・N9Kv-V9-03のVlan100とVlan101のIPアドレスにPingを実施し、正常に応答があることを確認します。
N9Kv-V9-01# ping 192.168.100.2 interval 1 timeout 1
PING 192.168.100.2 (192.168.100.2): 56 data bytes
64 bytes from 192.168.100.2: icmp_seq=0 ttl=254 time=8.967 ms
64 bytes from 192.168.100.2: icmp_seq=1 ttl=254 time=132.172 ms
64 bytes from 192.168.100.2: icmp_seq=2 ttl=254 time=356.064 ms
64 bytes from 192.168.100.2: icmp_seq=3 ttl=254 time=8.634 ms
64 bytes from 192.168.100.2: icmp_seq=4 ttl=254 time=8.259 ms
--- 192.168.100.2 ping statistics ---
5 packets transmitted, 5 packets received, 0.00% packet loss
round-trip min/avg/max = 8.259/102.819/356.064 ms
N9Kv-V9-01#N9Kv-V9-01# ping 192.168.101.2 interval 1 timeout 1
PING 192.168.101.2 (192.168.101.2): 56 data bytes
64 bytes from 192.168.101.2: icmp_seq=0 ttl=254 time=7.138 ms
64 bytes from 192.168.101.2: icmp_seq=1 ttl=254 time=8.882 ms
64 bytes from 192.168.101.2: icmp_seq=2 ttl=254 time=209.905 ms
64 bytes from 192.168.101.2: icmp_seq=3 ttl=254 time=490.17 ms
64 bytes from 192.168.101.2: icmp_seq=4 ttl=254 time=317.086 ms
--- 192.168.101.2 ping statistics ---
5 packets transmitted, 5 packets received, 0.00% packet loss
round-trip min/avg/max = 7.138/206.636/490.17 ms
N9Kv-V9-01#N9Kv-V9-01# ping 192.168.100.3 interval 1 timeout 1
PING 192.168.100.3 (192.168.100.3): 56 data bytes
64 bytes from 192.168.100.3: icmp_seq=0 ttl=254 time=7.663 ms
64 bytes from 192.168.100.3: icmp_seq=1 ttl=254 time=8.051 ms
64 bytes from 192.168.100.3: icmp_seq=2 ttl=254 time=8.215 ms
64 bytes from 192.168.100.3: icmp_seq=3 ttl=254 time=7.991 ms
64 bytes from 192.168.100.3: icmp_seq=4 ttl=254 time=362.465 ms
--- 192.168.100.3 ping statistics ---
5 packets transmitted, 5 packets received, 0.00% packet loss
round-trip min/avg/max = 7.663/78.876/362.465 ms
N9Kv-V9-01#N9Kv-V9-01# ping 192.168.101.3 interval 1 timeout 1
PING 192.168.101.3 (192.168.101.3): 56 data bytes
64 bytes from 192.168.101.3: icmp_seq=0 ttl=254 time=388.121 ms
64 bytes from 192.168.101.3: icmp_seq=1 ttl=254 time=222.243 ms
64 bytes from 192.168.101.3: icmp_seq=2 ttl=254 time=7.156 ms
64 bytes from 192.168.101.3: icmp_seq=3 ttl=254 time=622.214 ms
64 bytes from 192.168.101.3: icmp_seq=4 ttl=254 time=9.382 ms
--- 192.168.101.3 ping statistics ---
5 packets transmitted, 5 packets received, 0.00% packet loss
round-trip min/avg/max = 7.156/249.823/622.214 ms
N9Kv-V9-01#ARPテーブルを参照しサイトBに存在するN9Kv-V9-02のMACアドレスを学習していることを確認します。
N9Kv-V9-01# show ip arp
＜省略＞
Address Age MAC Address Interface Flags
192.168.101.2 00:09:17 000c.2916.2320 Vlan101
192.168.101.3 00:08:54 000c.2973.565c Vlan101
192.168.100.2 00:09:28 000c.2916.2320 Vlan100
192.168.100.3 00:09:29 000c.2973.565c Vlan100
N9Kv-V9-01#N9Kv-V9-02# show interface
＜省略＞
Vlan100 is up, line protocol is up, autostate enabled
Hardware is EtherSVI, address is 000c.2916.2320
Internet Address is 192.168.100.2/24
＜省略＞
Vlan101 is up, line protocol is up, autostate enabled
Hardware is EtherSVI, address is 000c.2916.2320
Internet Address is 192.168.101.2/24
＜省略＞
N9Kv-V9-02#N9Kv-V9-03# show interface
＜省略＞
Vlan100 is up, line protocol is up, autostate enabled
Hardware is EtherSVI, address is 000c.2973.565c
Internet Address is 192.168.100.3/24
＜省略＞
Vlan101 is up, line protocol is up, autostate enabled
Hardware is EtherSVI, address is 000c.2973.565c
Internet Address is 192.168.101.3/24
＜省略＞
N9Kv-V9-02#以上で3サイト冗長構成時の動作確認を終わります。
まとめ
全3回のOTV検証は以上となります。実施したことをまとめます。
- 第一回目では、OTVがなぜ仮想環境に求められるのかを説明しました。また、シンプルな構成でOTVを組み、ステータスの確認や簡易な疎通確認のテストを実施しました。
- 第二回目では、マルチホーミング構成の冗長構成でOTVを構成し、負荷分散の確認、及び障害試験を実施し切り替わりに要する時間を測定しました。
- 第三回目では、第二回目の構成を維持した状態で、1サイト追加し合計3サイトのOTVを組み、ステータスの確認と疎通確認のテストを実施しました。
検証時に参考にしたサイトやコマンドのまとめ
OTVはネット上でも情報が少なく実装するまで時間を要すると思いますが、下記のCisco公式情報を読み込むことである程度OTVの実装方法が分かると思います。下記で提示しているリンク先は当方がOTVについて調べたサイトと、本検証環境の構築中に頻繁に使用したコマンドです。
※CSR1000v（またはIOS-XE）のOTVは本当に情報が少なく、OTVのほとんどはNexus7000を例にしたものでした。ただ、OTVの基本原理はIOS-XEでもNexusでも大きく変わらないと思いますので下記のCisco公式サイトがとても参考になりました。
■参考サイト
・Cisco Nexus 7000 シリーズ NX-OS OTV 設定ガイド
https://www.cisco.com/c/ja_jp/td/docs/sw/dcswt/nex7000swt/cg/043/b_Cisco_Nexus_7000_Series_NX-OS_OTV_Configuration_Guide/b_Cisco_Nexus_7000_Series_NX-OS_OTV_Configuration_Guide_chapter_010.html
・ASR1000 OTV 導入モード（スティック上の OTV）
https://www.cisco.com/c/ja_jp/support/docs/content-networking/adaptive-session-redundancy-asr/210440-ASR1000-OTV-Deployment-Modes-OTV-on-a-S.html
・ASR 1000： OTV マルチホーミング ソフトウェア アップグレードに関するベスト プラクティス
https://www.cisco.com/c/ja_jp/support/docs/content-networking/adaptive-session-redundancy-asr/211348-ASR-1000-OTV-Multihoming-Software-Upgra.html
・Implementing Data Center Overlay Protocols
https://www.ciscopress.com/articles/article.asp?p=2999385&seqNum=2
■確認コマンド
show otv
show otv site
show otv vlan
show otv adjacency
show otv arp-nd-cache
show otv route