搭建实验环境
实现此案例需要按照如下步骤进行。
vlan 2
interface Vlanif1
ip address 192.168.10.1 30
interface Vlanif2
ip address 192.168.1.1 255.255.255.0
vrrp vrid 1 virtual-ip 192.168.1.254
vrrp vrid 1 priority 200
vrrp vrid 1 preempt-mode timer delay 20
vrrp vrid 1 track interface GigabitEthernet0/0/1 reduced 100
interface GigabitEthernet0/0/1
port link-type access
interface GigabitEthernet0/0/2
port link-type trunk
port trunk allow-pass vlan 2 to 4094
ip route-static 0.0.0.0 0.0.0.0 192.168.10.2
vlan 2
interface Vlanif1
ip address 192.168.20.1 30
interface Vlanif2
ip address 192.168.1.2 255.255.255.0
vrrp vrid 1 virtual-ip 192.168.1.254
vrrp vrid 1 priority 150
interface GigabitEthernet0/0/1
port link-type access
interface GigabitEthernet0/0/2
port link-type trunk
port trunk allow-pass vlan 2 to 4094
ip route-static 0.0.0.0 0.0.0.0 192.168.20.2
vlan 2
interface Ethernet0/0/1
port link-type access
port default vlan 2
interface GigabitEthernet0/0/1
port link-type trunk
port trunk allow-pass vlan 2 to 4094
interface GigabitEthernet0/0/2
port link-type trunk
port trunk allow-pass vlan 2 to 4094
interface GigabitEthernet0/0/1
ip address 192.168.10.2 30
interface GigabitEthernet0/0/2
ip address 192.168.20.2 30
interface LoopBack0
ip address 1.1.1.1 255.255.255.0
ip route-static 192.168.1.0 255.255.255.0 192.168.10.1
ip route-static 192.168.1.0 255.255.255.0 192.168.20.1 preference 100
<SW1>dis vrrp
Vlanif2 | Virtual Router 1
State : Master
Virtual IP : 192.168.1.254
Master IP : 192.168.1.1
PriorityRun : 200
PriorityConfig : 200
MasterPriority : 200
Preempt : YES Delay Time : 20 s
TimerRun : 1 s
TimerConfig : 1 s
Auth type : NONE
Virtual MAC : 0000-5e00-0101
Check TTL : YES
Config type : normal-vrrp
Track IF : GigabitEthernet0/0/1 Priority reduced : 100
IF state : UP
Create time : 2018-04-09 19:12:37 UTC-08:00
Last change time : 2018-04-09 19:21:02 UTC-08:00
<SW1>dis vrrp bri
VRID State Interface Type Virtual IP
----------------------------------------------------------------
1 Master Vlanif2 Normal 192.168.1.254
----------------------------------------------------------------
Total:1 Master:1 Backup:0 Non-active:0
<SW2>dis vrrp
Vlanif2 | Virtual Router 1
State : Backup
Virtual IP : 192.168.1.254
Master IP : 192.168.1.1
PriorityRun : 150
PriorityConfig : 150
MasterPriority : 200
Preempt : YES Delay Time : 0 s
TimerRun : 1 s
TimerConfig : 1 s
Auth type : NONE
Virtual MAC : 0000-5e00-0101
Check TTL : YES
Config type : normal-vrrp
Create time : 2018-04-09 19:20:13 UTC-08:00
Last change time : 2018-04-09 19:21:03 UTC-08:00
<SW2>dis vrrp bri
VRID State Interface Type Virtual IP
----------------------------------------------------------------
1 Backup Vlanif2 Normal 192.168.1.254
----------------------------------------------------------------
Total:1 Master:0 Backup:1 Non-active:0
<R1>dis ip ro
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 14 Routes : 14
Destination/Mask Proto Pre Cost Flags NextHop Interface
1.1.1.0/24 Direct 0 0 D 1.1.1.1 LoopBack0
1.1.1.1/32 Direct 0 0 D 127.0.0.1 LoopBack0
1.1.1.255/32 Direct 0 0 D 127.0.0.1 LoopBack0
127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0
127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0
127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0
192.168.1.0/24 Static 60 0 RD 192.168.10.1 GigabitEthernet
0/0/1
192.168.10.0/30 Direct 0 0 D 192.168.10.2 GigabitEthernet
0/0/1
192.168.10.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/1
192.168.10.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/1
192.168.20.0/30 Direct 0 0 D 192.168.20.2 GigabitEthernet
0/0/2
192.168.20.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/2
192.168.20.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/2
255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0
关闭SW1的GigabitEthernet0/0/1接口，PC1仍然可以ping通1.1.1.1。
<SW1>dis vrrp bri
VRID State Interface Type Virtual IP
----------------------------------------------------------------
1 Backup Vlanif2 Normal 192.168.1.254
----------------------------------------------------------------
Total:1 Master:0 Backup:1 Non-active:0
<SW2>dis vrrp bri
VRID State Interface Type Virtual IP
----------------------------------------------------------------
1 Master Vlanif2 Normal 192.168.1.254
----------------------------------------------------------------
Total:1 Master:1 Backup:0 Non-active:0
<R1>dis ip ro
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 11 Routes : 11
Destination/Mask Proto Pre Cost Flags NextHop Interface
1.1.1.0/24 Direct 0 0 D 1.1.1.1 LoopBack0
1.1.1.1/32 Direct 0 0 D 127.0.0.1 LoopBack0
1.1.1.255/32 Direct 0 0 D 127.0.0.1 LoopBack0
127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0
127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0
127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0
192.168.1.0/24 Static 100 0 RD 192.168.20.1 GigabitEthernet
0/0/2
192.168.20.0/30 Direct 0 0 D 192.168.20.2 GigabitEthernet
0/0/2
192.168.20.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/2
192.168.20.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/2
255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0
然后恢复SW1的GigabitEthernet0/0/1接口，等待20秒后，SW1重新成为Master。
<SW1>dis vrrp bri
VRID State Interface Type Virtual IP
----------------------------------------------------------------
1 Master Vlanif2 Normal 192.168.1.254
----------------------------------------------------------------
Total:1 Master:1 Backup:0 Non-active:0
