CISCO入門

HSRP + Tracking + IP SLAの最小構成例

R1

   !
   track 90 ip sla 20
   !
   interface FastEthernet1/0/1
    switchport access vlan 100
    switchport mode access
   !
   interface FastEthernet1/0/2
    switchport access vlan 200
    switchport mode access
   !
   interface Vlan100
    ip address 10.10.10.10 255.255.255.0
    standby version 2
    standby 1 ip 10.10.10.254
    standby 1 priority 105
    standby 1 preempt
    standby 1 track 90 decrement 10
   !
   interface Vlan200
    ip address 172.16.16.10 255.255.255.0
    standby 2 ip 172.16.16.254
    standby 2 priority 105
    standby 2 preempt
    standby 2 track 90 decrement 10
   !
   ip sla 20
    icmp-echo 10.10.10.20
   ip sla schedule 20 life forever start-time now
   !

R2

   !
   interface FastEthernet1/0/1
    switchport access vlan 100
    switchport mode access
   !
   interface FastEthernet1/0/2
    switchport access vlan 200
    switchport mode access
   !
   interface Vlan100
    ip address 10.10.10.10 255.255.255.0
    standby 1 ip 10.10.10.254
    standby 1 priority 100 (Eef100省略可)
    standby 1 preempt
   !
   interface Vlan200
    ip address 172.16.16.10 255.255.255.0
    standby 2 ip 172.16.16.254
    standby 2 priority 100 (Eef100省略可)
    standby 2 preempt
   !

おまけ

Version2にすると認証が可能だが、一度も認証しないとINITになる。

Switch(config-if)#standby version 2
Switch(config-if)#standby 1 authentication text cisco

R1でのshow例

   Switch#show standby
   Vlan100 - Group 1
     State is Active
       8 state changes, last state change 00:01:33
     Virtual IP address is 10.10.10.254
     Active virtual MAC address is 0000.0c07.ac01
       Local virtual MAC address is 0000.0c07.ac01 (v1 default)
     Hello time 3 sec, hold time 10 sec
       Next hello sent in 2.000 secs
     Preemption enabled
     Active router is local
     Standby router is unknown
     Priority 105 (configured 105)
       Track object 90 state Up decrement 12
     Group name is "hsrp-Vl100-1" (default)

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