■IS-IS エリア間ルーティングの基本設定
IOS-XRはDefaultでL1/L2ルータとして動作するため、エリア境界のルータ(XR2)で明示的に
Config設定する必要はなし。XR1/R4ではL1ルーターとして設定
L1ルータの設定は以下。
router isis 1
is-type level-1
■Configとトポロジーは以下のとおり。
■Configとトポロジーは以下のとおり。(R3とR4はIS-IS⑤の設定と同じなので割愛)
■XR1
interface Loopback0
ipv4 address 1.1.1.1 255.255.255.255
!
interface Loopback6
ipv6 address 1::1/128
!
interface GigabitEthernet0/0/0/0
ipv4 address 12.12.12.1 255.255.255.0
ipv6 address 12::1/64
!
router isis 1
is-type level-1
net 49.0000.0000.0001.00
address-family ipv4 unicast
metric-style wide
!
interface Loopback0
address-family ipv4 unicast
!
!
interface Loopback6
address-family ipv6 unicast
!
!
interface GigabitEthernet0/0/0/0
address-family ipv4 unicast
!
address-family ipv6 unicast
!
!
end
■XR2
interface Loopback0
ipv4 address 2.2.2.2 255.255.255.255
!
interface Loopback6
ipv6 address 2::2/128
!
interface GigabitEthernet0/0/0/0
ipv4 address 12.12.12.2 255.255.255.0
ipv6 address 12::2/64
!
interface GigabitEthernet0/0/0/1
ipv4 address 23.23.23.2 255.255.255.0
ipv6 address 23::2/64
!
router isis 1
net 49.0000.0000.0002.00
address-family ipv4 unicast
metric-style wide
!
interface Loopback0
address-family ipv4 unicast
!
!
interface Loopback6
address-family ipv6 unicast
!
!
interface GigabitEthernet0/0/0/0
address-family ipv4 unicast
!
address-family ipv6 unicast
!
!
interface GigabitEthernet0/0/0/1
address-family ipv4 unicast
!
address-family ipv6 unicast
!
!
end
■Neighbor状態やRIBエントリーは以下のとおり（R3/R4は割愛）
XR1⇔R4間のルーティングはL2ルータからDGWを受信する。
■XR1
RP/0/0/CPU0:XR1#show isis neighbors detail
IS-IS 1 neighbors:
System Id Interface SNPA State Holdtime Type IETF-NSF
XR2 Gi0/0/0/0 0800.27e2.1a7c Up 7 L1 Capable
Area Address(es): 49
IPv4 Address(es): 12.12.12.2*
IPv6 Address(es): fe80::a00:27ff:fee2:1a7c*
Topologies: ‘IPv4 Unicast’ ‘IPv6 Unicast’
Uptime: 02:19:51
Total neighbor count: 1
RP/0/0/CPU0:XR1#show route ipv4 unicast
i*L1 0.0.0.0/0 [115/10] via 12.12.12.2, 00:05:50, GigabitEthernet0/0/0/0
L 1.1.1.1/32 is directly connected, 01:54:54, Loopback0
i L1 2.2.2.2/32 [115/20] via 12.12.12.2, 00:07:10, GigabitEthernet0/0/0/0
C 12.12.12.0/24 is directly connected, 01:54:53, GigabitEthernet0/0/0/0
L 12.12.12.1/32 is directly connected, 01:54:53, GigabitEthernet0/0/0/0
i L1 23.23.23.0/24 [115/20] via 12.12.12.2, 00:07:10, GigabitEthernet0/0/0/0
RP/0/0/CPU0:XR1#
RP/0/0/CPU0:XR1#
RP/0/0/CPU0:XR1#show route ipv6 unicast
L 1::1/128 is directly connected,
01:54:58, Loopback6
i L1 2::2/128
[115/20] via fe80::a00:27ff:fee2:1a7c, 01:54:53, GigabitEthernet0/0/0/0
C 12::/64 is directly connected,
01:54:57, GigabitEthernet0/0/0/0
L 12::1/128 is directly connected,
01:54:57, GigabitEthernet0/0/0/0
i L1 23::/64
[115/20] via fe80::a00:27ff:fee2:1a7c, 00:44:11, GigabitEthernet0/0/0/0
■XR2
RP/0/0/CPU0:XR2#show isis neighbors detail
IS-IS 1 neighbors:
System Id Interface SNPA State Holdtime Type IETF-NSF
XR1 Gi0/0/0/0 0800.2789.8077 Up 29 L1 Capable
Area Address(es): 49
IPv4 Address(es): 12.12.12.1*
IPv6 Address(es): fe80::a00:27ff:fe89:8077*
Topologies: ‘IPv4 Unicast’ ‘IPv6 Unicast’
Uptime: 01:55:26
R3 Gi0/0/0/1 ca03.3860.001c Up 7 L2 Capable
Area Address(es): 49.0001
IPv4 Address(es): 23.23.23.3*
Topologies: ‘IPv4 Unicast’
Uptime: 00:11:57
Total neighbor count: 2
RP/0/0/CPU0:XR2#show route ipv4 unicast
i L1 1.1.1.1/32 [115/20] via 12.12.12.1, 00:07:51, GigabitEthernet0/0/0/0
L 2.2.2.2/32 is directly connected, 01:55:36, Loopback0
i L2 3.3.3.3/32 [115/20] via 23.23.23.3, 00:08:38, GigabitEthernet0/0/0/1
C 12.12.12.0/24 is directly connected, 01:55:36, GigabitEthernet0/0/0/0
L 12.12.12.2/32 is directly connected, 01:55:36, GigabitEthernet0/0/0/0
C 23.23.23.0/24 is directly connected, 00:50:13, GigabitEthernet0/0/0/1
L 23.23.23.2/32 is directly connected, 00:50:13, GigabitEthernet0/0/0/1
i L2 34.34.34.0/24 [115/20] via 23.23.23.3, 00:08:38, GigabitEthernet0/0/0/1
RP/0/0/CPU0:XR2#show route ipv6 unicast
i L1 1::1/128
[115/20] via fe80::a00:27ff:fe89:8077, 01:55:32, GigabitEthernet0/0/0/0
L 2::2/128 is directly connected,
01:55:40, Loopback6
C 12::/64 is directly connected,
01:55:40, GigabitEthernet0/0/0/0
L 12::2/128 is directly connected,
01:55:40, GigabitEthernet0/0/0/0
C 23::/64 is directly connected,
00:50:16, GigabitEthernet0/0/0/1
L 23::2/128 is directly connected,
00:50:16, GigabitEthernet0/0/0/1
