202 lines
5.4 KiB
Markdown
202 lines
5.4 KiB
Markdown
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# BFD和VRRP
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### 一、PC`s IP
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### 二、VLAN
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- **SW3**
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```
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[SW3]vlan 10
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[SW3-vlan10]quit
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[SW3]port-group group-member g0/0/1 g0/0/2
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[SW3-port-group]port link-type access
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[SW3-port-group]port default vlan 10
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[SW3-port-group]quit
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[SW3]port-group group-member g0/0/3 g0/0/4
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[SW3-port-group]port link-type trunk
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[SW3-port-group]port trunk allow-pass vlan all
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```
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### 三、VRRP
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- **SW1**
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```
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[SW1]vlan 10
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[SW1-vlan10]quit
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[SW1]int g0/0/1
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[SW1-GigabitEthernet0/0/1]port link-type trunk
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[SW1-GigabitEthernet0/0/1]port trunk allow-pass vlan all
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[SW1-GigabitEthernet0/0/1]quit
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[SW1]int vlan 10
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[SW1-Vlanif10]ip add 192.168.10.254 24
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[SW1-Vlanif10]vrrp vrid 10 virtual-ip 192.168.10.254
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[SW1-Vlanif10]vrrp vrid 10 priority 130
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```
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- **SW2**
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```
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[SW2]vlan 10
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[SW2-vlan10]quit
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[SW2]int g0/0/1
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[SW2-GigabitEthernet0/0/1]port link-type trunk
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[SW2-GigabitEthernet0/0/1]port trunk allow-pass vlan all
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[SW2-GigabitEthernet0/0/1]quit
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[SW2]int vlan 10
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[SW2-Vlanif10]ip add 192.168.10.252 24
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[SW2-Vlanif10]vrrp vrid 10 virtual-ip 192.168.10.254
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```
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### 四、BFD
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- **SW1**
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```
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[SW1]bfd
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[SW1-bfd]quit
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[SW1]bfd ntd2407 bind peer-ip 192.168.10.252
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[SW1-bfd-session-ntd2407]discriminator local 1
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[SW1-bfd-session-ntd2407]discriminator remote 2
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[SW1-bfd-session-ntd2407]min-tx-interval 100
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[SW1-bfd-session-ntd2407]min-rx-interval 100
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[SW1-bfd-session-ntd2407]commit
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```
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- **SW2**
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```
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[SW2]bfd
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[SW2-bfd]quit
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[SW2]bfd ntd2407 bind peer-ip 192.168.10.251
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[SW2-bfd-session-ntd2407]discriminator local 2
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[SW2-bfd-session-ntd2407]discriminator remote 1
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[SW2-bfd-session-ntd2407]min-tx-interval 100
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[SW2-bfd-session-ntd2407]min-rx-interval 100
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[SW2-bfd-session-ntd2407]commit
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```
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### 五、BFD与VRRP联动
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- **SW2**
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```
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[SW2]int vlan 10
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[SW2-Vlanif10]vrrp vrid 10 track bfd-session 2 increased 60
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```
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*解释：*
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1. `[SW2]int vlan 10`
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- 进入交换机的VLAN接口配置模式，针对VLAN 10。
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2. `[SW2-Vlanif10]vrrp vrid 10 track bfd-session 2 increased 60`
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- 在VLAN接口10上配置VRRP虚拟路由器ID为10，并设置对BFD会话2的跟踪。
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- `track bfd-session 2`：指定跟踪的BFD会话，这里的会话ID是2。
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- `increased 60`：当BFD会话2的状态变为Down时，VRRP的优先级将增加60。这通常用于确保当主链路出现问题时，备份链路能够接管，提高其VRRP优先级，从而成为新的主路由器。
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> 这个配置的作用是，当BFD会话2检测到链路故障时，VRRP的优先级会增加，这有助于VRRP组中的备用路由器成为新的主路由器，从而保证网络的连续性和可靠性。
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>
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> 请注意，这个配置假设BFD会话2已经正确配置，并且与VRRP虚拟路由器关联的接口是VLAN 10。如果BFD会话状态变为Down，VRRP优先级的增加将触发VRRP主备切换。
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### 六、完备性测试
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- **SW1**
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```
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[SW1]dis vrrp
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Vlanif10 | Virtual Router 10
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State : Master
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Virtual IP : 192.168.10.254
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Master IP : 192.168.10.254
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PriorityRun : 255
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PriorityConfig : 130
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MasterPriority : 255
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Preempt : YES Delay Time : 0 s
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TimerRun : 1 s
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TimerConfig : 1 s
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Auth type : NONE
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Virtual MAC : 0000-5e00-010a
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Check TTL : YES
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Config type : normal-vrrp
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Create time : 2024-08-28 15:57:41 UTC-08:00
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Last change time : 2024-08-28 16:13:44 UTC-08:00
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```
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- **SW2**
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```
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[SW2]dis vrrp
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Vlanif10 | Virtual Router 10
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State : Backup
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Virtual IP : 192.168.10.254
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Master IP : 192.168.10.254
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PriorityRun : 100
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PriorityConfig : 100
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MasterPriority : 255
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Preempt : YES Delay Time : 0 s
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TimerRun : 1 s
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TimerConfig : 1 s
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Auth type : NONE
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Virtual MAC : 0000-5e00-010a
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Check TTL : YES
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Config type : normal-vrrp
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Track BFD : 2 Priority increased : 60
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BFD-session state : INITIALIZE
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Create time : 2024-08-28 15:55:20 UTC-08:00
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Last change time : 2024-08-28 16:28:55 UTC-08:00
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```
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### 七、功能性测试
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- **SW1**
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```
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[SW1]dis vrrp
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Vlanif10 | Virtual Router 10
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State : Initialize
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Virtual IP : 192.168.10.254
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Master IP : 0.0.0.0
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PriorityRun : 255
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PriorityConfig : 130
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MasterPriority : 0
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Preempt : YES Delay Time : 0 s
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TimerRun : 1 s
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TimerConfig : 1 s
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Auth type : NONE
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Virtual MAC : 0000-5e00-010a
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Check TTL : YES
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Config type : normal-vrrp
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Create time : 2024-08-28 15:57:41 UTC-08:00
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Last change time : 2024-08-28 16:39:16 UTC-08:00
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```
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- **SW2**
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```
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[SW2]dis vrrp
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Vlanif10 | Virtual Router 10
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State : Master
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Virtual IP : 192.168.10.254
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Master IP : 192.168.10.252
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PriorityRun : 100
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PriorityConfig : 100
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MasterPriority : 100
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Preempt : YES Delay Time : 0 s
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TimerRun : 1 s
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TimerConfig : 1 s
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Auth type : NONE
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Virtual MAC : 0000-5e00-010a
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Check TTL : YES
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Config type : normal-vrrp
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Track BFD : 2 Priority increased : 60
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BFD-session state : INITIALIZE
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Create time : 2024-08-28 15:55:20 UTC-08:00
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Last change time : 2024-08-28 16:39:17 UTC-08:00
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```
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