冗余-VRRP

虚拟网关冗余协议-作用在网络给网关做备份
VRRP----公有（两个网关之间做备份）
HSRP----思科私有（两个网关之间做备份）
GLBP----思科私有（8个网关之间做冗余备份）
都会生成一个虚拟网关
[R1]display vrrp
Tracert //路由跟踪命令
在VRRP中有Master和Backup
冗余-VRRP

竞选原则
1、比较优先级，默认=100，越大越好。
2、比较接口的ip地址，越大越好。
冗余-VRRP

The device is running!
[R1-GigabitEthernet0/0/0]IP ADD 192.168.1.254 24
[R1-GigabitEthernet0/0/0]INT G 0/0/1
[R1-GigabitEthernet0/0/1]IP ADD 13.1.1.1 24
[R1-GigabitEthernet0/0/1]RIP 1
[R1-rip-1]net [R1-rip-1]network 13.0.0.0
[R1-rip-1]network 192.168.1.0
[R1-rip-1]v 2
[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]vrrp vrid 1 virtual-ip 192.168.1.252 //添加虚拟IP地址；
[R1-GigabitEthernet0/0/0]q
[R1]display vrrp
[R1]display vrrp GigabitEthernet0/0/0
GigabitEthernet0/0/0 | Virtual Router 1
State : Master //主线路
Virtual IP : 192.168.1.252
Master IP : 192.168.1.254
PriorityRun : 100
PriorityConfig : 100
MasterPriority : 100
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
Backup-forward : disabled
Create time : 2019-05-28 21:24:44 UTC-08:00
Last change time : 2019-05-28 21:24:48 UTC-08:00

[R1-GigabitEthernet0/0/0]vrrp vrid 2 virtual-ip 192.168.1.251

The device is running!
[R2]INT G 0/0/0
[R2-GigabitEthernet0/0/0]IP ADD 192.168.1.253 24
[R2-GigabitEthernet0/0/1]IP ADD 23.1.1.2 24
[R2]rip 1
[R2-rip-1]network 23.0.0.0
[R2-rip-1]network 192.168.1.0
[R2-rip-1]v 2
[R2]int g 0/0/0
[R2-GigabitEthernet0/0/0]vrrp vrid 1 virtual-ip 192.168.1.252 //添加虚拟IP地址
[R2-GigabitEthernet0/0/0]q
[R2]display vrrp
GigabitEthernet0/0/0 | Virtual Router 1
State : Backup //备用线路
Virtual IP : 192.168.1.252
Master IP : 192.168.1.254
PriorityRun : 100
PriorityConfig : 100
MasterPriority : 100
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
Backup-forward : disabled
Create time : 2019-05-28 21:25:46 UTC-08:00
Last change time : 2019-05-28 21:25:46 UTC-08:00
[R2-GigabitEthernet0/0/0]vrrp vrid 1 track interface g 0/0/1 reduced 30 //上联接口跟踪命令（接口0/0/1 shutdown掉就自动减30）
[R2]dis
[R2]int g0/0/0
[R2-GigabitEthernet0/0/0]vrrp vrid 1 priority 120 //将
[R2-GigabitEthernet0/0/0]display vrrp
GigabitEthernet0/0/0 | Virtual Router 1
State : Master //参数该后变为主线路
Virtual IP : 192.168.1.252
Master IP : 192.168.1.253
PriorityRun : 120
PriorityConfig : 120
MasterPriority : 120
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
Backup-forward : disabled
Create time : 2019-05-28 21:25:46 UTC-08:00
Last change time : 2019-05-28 21:33:53 UTC-08:00
[R2-GigabitEthernet0/0/0]vrrp vrid 2 virtual-ip 192.168.1.251
The device is running!
[R3-GigabitEthernet0/0/0]IP ADD 13.1.1.3 24
[R3-GigabitEthernet0/0/0]INT G 0/0/1
[R3-GigabitEthernet0/0/1]IP ADD 23.1.1.3 24
[R3] interface LoopBack 0
[R3-LoopBack0]IP ADD 3.3.3.3 24
[R3-LoopBack0]rip 1
[R3-rip-1] network 13.0.0.0
[R3-rip-1] network 23.0.0.0
[R3-rip-1] network 3.0.0.0
[R3-rip-1] v 2

冗余-VRRP

冗余-VRRP

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