HSRP for IPv6

初期設定

ipv6_hsrp_cco.txt

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iosv-2(config-if)#standby 1 ipv6 autoconfig
% HSRP version 2 is required for IPv6 support

まずHSRPv2を起動しないといけない

iosv-0#ping ipv6 FE80::5:73FF:FEA0:1
Output Interface: GigabitEthernet0/0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FE80::5:73FF:FEA0:1, timeout is 2 seconds:
Packet sent with a source address of FE80::5054:FF:FE18:7965%GigabitEthernet0/0
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/12/24 ms

iosv-2#sh standby brief
                     P indicates configured to preempt.
                     |
Interface   Grp  Pri P State   Active          Standby         Virtual IP
Gi0/0       1    120 P Active  local           FE80::5054:FF:FE06:F300
                                                               FE80::5:73FF:FEA0:1


[障害チェック]
iosv-2(config-if)#shut
iosv-2(config-if)#
*Jun 19 22:00:12.302: %HSRP-5-STATECHANGE: GigabitEthernet0/0 Grp 1 state Active -> Init
iosv-2(config-if)#
*Jun 19 22:00:14.305: %LINK-5-CHANGED: Interface GigabitEthernet0/0, changed state to administratively down
*Jun 19 22:00:15.306: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to down

iosv-0#ping FE80::5:73FF:FEA0:1     
Output Interface: GigabitEthernet0/0      
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FE80::5:73FF:FEA0:1, timeout is 2 seconds:
Packet sent with a source address of FE80::5054:FF:FE18:7965%GigabitEthernet0/0
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/8/17 ms

iosv-3#sh standby brief
                     P indicates configured to preempt.
                     |
Interface   Grp  Pri P State   Active          Standby         Virtual IP
Gi0/0       1    100 P Active  local           unknown         FE80::5:73FF:FEA0:1


[障害復旧]
iosv-2(config-if)#no shut
iosv-2(config-if)#
*Jun 19 22:02:57.781: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to up
*Jun 19 22:02:58.781: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up
*Jun 19 22:02:58.801: %HSRP-5-STATECHANGE: GigabitEthernet0/0 Grp 1 state Listen -> Active

iosv-3#
*Jun 19 22:03:26.699: %HSRP-5-STATECHANGE: GigabitEthernet0/0 Grp 1 state Active -> Speak
iosv-3#
*Jun 19 22:03:36.705: %HSRP-5-STATECHANGE: GigabitEthernet0/0 Grp 1 state Speak -> Standby
iosv-3#sh standby brief
                     P indicates configured to preempt.
                     |
Interface   Grp  Pri P State   Active          Standby         Virtual IP
Gi0/0       1    100 P Standby FE80::5054:FF:FE01:D5D1
                                               local           FE80::5:73FF:FEA0:1

・基本的なHSRPの動作を確認
・Activeに障害が発生すると即座に切り替わり、仮想アドレスは変化なし
・preemptを設定しているので元Active(priority120)が復旧するとまたすぐにActiveになる
・HSRPルータは、互いのルータをリンクローカルで識別している
・autoconfigで設定した際の仮想IPもリンクローカルで生成される

参考

Chapter: HSRP for IPv6