VRRPv3
基本
Config
R4(config)#fhrp version vrrp v3
R4(config)#int gi0/2
R4(config-if)#vrrp 1 address-family ipv4
R4(config-if-vrrp)#address 155.1.146.254
R4(config-if-vrrp)#priority 120
%VRRP-6-STATE: GigabitEthernet0/2 IPv4 group 1 state INIT -> BACKUP
%VRRP-6-STATE: GigabitEthernet0/2 IPv4 group 1 state BACKUP -> MASTER
R1(config)#fhrp version vrrp v3
R1(config)#int gi0/2
R1(config-if)#vrrp 1 address-family ipv4
R1(config-if-vrrp)#address 155.1.146.254
R1(config-if-vrrp)#
%VRRP-6-STATE: GigabitEthernet0/2 IPv4 group 1 state INIT -> BACKUP
確認
R4#sh vrrp
GigabitEthernet0/2 - Group 1 - Address-Family IPv4
State is MASTER
State duration 1 mins 26.318 secs
Virtual IP address is 155.1.146.254
Virtual MAC address is 0000.5E00.0101
Advertisement interval is 1000 msec
Preemption enabled
Priority is 120
Master Router is 155.1.146.4 (local), priority is 120
Master Advertisement interval is 1000 msec (expires in 196 msec)
Master Down interval is unknown
R1(config-if-vrrp)#do sh vrrp
GigabitEthernet0/2 - Group 1 - Address-Family IPv4
State is BACKUP
State duration 41.220 secs
Virtual IP address is 155.1.146.254
Virtual MAC address is 0000.5E00.0101
Advertisement interval is 1000 msec
Preemption enabled
Priority is 100
Master Router is 155.1.146.4, priority is 120
Master Advertisement interval is 1000 msec (learned)
Master Down interval is 3609 msec (expires in 3401 msec)
検証1
R1(config)#no fhrp version vrrp v3
R1(config)#
R1(config)#int gi0/2
R1(config-if)#vrrp 1 ?
authentication Authentication
description Group specific description
ip Enable Virtual Router Redundancy Protocol (VRRP) for IP
preempt Enable preemption of lower priority Master
priority Priority of this VRRP group
shutdown Disable VRRP Configuration
timers Set the VRRP timers
track Event Tracking
fhrp version vrrp v3が設定されていないとaddress-familyを作れない。
R1(config-if)#vrrp 1 ip 155.1.146.254
R1(config-if)#
%VRRP-6-STATECHANGE: Gi0/2 Grp 1 state Init -> Backup
%VRRP-6-STATECHANGE: Gi0/2 Grp 1 state Init -> Backup
R1(config-if)#
%VRRP-6-STATECHANGE: Gi0/2 Grp 1 state Backup -> Master
R1(config-if)#
R1(config-if)#do sh vrrp
GigabitEthernet0/2 - Group 1
State is Master
Virtual IP address is 155.1.146.254
Virtual MAC address is 0000.5e00.0101
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 100
Master Router is 155.1.146.1 (local), priority is 100
Master Advertisement interval is 1.000 sec
Master Down interval is 3.609 sec
R4#sh vrrp
GigabitEthernet0/2 - Group 1 - Address-Family IPv4
State is MASTER
State duration 8 mins 34.295 secs
Virtual IP address is 155.1.146.254
Virtual MAC address is 0000.5E00.0101
Advertisement interval is 1000 msec
Preemption enabled
Priority is 120
Master Router is 155.1.146.4 (local), priority is 120
Master Advertisement interval is 1000 msec (expires in 25 msec)
Master Down interval is unknown
両方ともMaster→それぞれが別のVRRPセッションを作っている
検証2
R4(config)#int gi0/2
R4(config-if)#vrrp 1 address-family ipv4
R4(config-if-vrrp)#vrrpv2
R1(config-if)#
%VRRP-6-STATECHANGE: Gi0/2 Grp 1 state Master -> Backup
vrrp address-family内でvrrpv2を有効にすることで、片方のルータがvrrpv3に対応していなくても連携することができるようになる。
R6#trace 155.1.146.254
Type escape sequence to abort.
Tracing the route to 155.1.146.254
VRF info: (vrf in name/id, vrf out name/id)
1 155.1.146.4 2 msec 1 msec 2 msec
R1(config-if)#vrrp 1 priority 150
R1(config-if)#
%VRRP-6-STATECHANGE: Gi0/2 Grp 1 state Backup -> Master
R6#trace 155.1.146.254
Type escape sequence to abort.
Tracing the route to 155.1.146.254
VRF info: (vrf in name/id, vrf out name/id)
1 155.1.146.1 2 msec 3 msec 3 msec
片方がVRRPv3に対応していなくても操作は同じ。iosv-1がMasterになるようプライオリティを変更すると、デフォルトでプリエンプトが有効なのですぐにiosv-1がMasterルータになる。
参考
Chapter: VRRPv3 Protocol Support
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