Virtual Router Redundancy Protocol VRRP Configuration Example

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Virtual Router Redundancy Protocol VRRP Configuration ExampleSummary:How to configure Virtual Router Redundancy Protocol (VRRP) on J-Series/SRX DevicesProblem or Goal: Cause: Solution:Configuration

Master Node: ------------------

- Configure the Virtual IP address which will be same for both Master/Backup devices. set interfaces fe-0/0/0 unit 0 family inet address 1.1.1.2/24 vrrp-group 1 virtual-address 1.1.1.1

- Then set the priority of the Master Node which should be greater than the priority of the Backup Node. set interfaces fe-0/0/0 unit 0 family inet address 1.1.1.2/24 vrrp-group 1 priority 200

- Then configure the authentication method if you want to have authentication for VRRP. set interfaces fe-0/0/0 unit 0 family inet address 1.1.1.2/24 vrrp-group 1 authentication-type md5

- Configure the password for authentication on the Master Node. set interfaces fe-0/0/0 unit 0 family inet address 1.1.1.2/24 vrrp-group 1 authentication-key Juniper

- The below accept-data command is used to accept data destined for Virtual IP address. set interfaces fe-0/0/0 unit 0 family inet address 1.1.1.2/24 vrrp-group 1 accept-data

- The below command is used to subtract from priority when interface is down. For example with below configuration if fe-0/0/1 goes down then VRRP will failover to Backup Node. set interfaces fe-0/0/0 unit 0 family inet address 1.1.1.2/24 vrrp-group 1 track interface fe-0/0/1 priority-cost 200

Backup Node: -------------------

- On the backup Node again configure the common Virtual IP Address. set interfaces fe-0/0/0 unit 0 family inet address 1.1.1.3/24 vrrp-group 1 virtual-address 1.1.1.1

- The priority of the Backup Node should be less than the the priority of the Master. set interfaces fe-0/0/0 unit 0 family inet address 1.1.1.3/24 vrrp-group 1 priority 100

- The authentication configured on the Backup Node should match with the authentication of Master Node. set interfaces fe-0/0/0 unit 0 family inet address 1.1.1.3/24 vrrp-group 1 authentication-type md5

- The password configure should also be the same. set interfaces fe-0/0/0 unit 0 family inet address 1.1.1.3/24 vrrp-group 1 authentication-key Juniper

- This accept data command is required on Backup Node if you want to accept data for the Virtual IP on the Backup Node. set interfaces fe-0/0/0 unit 0 family inet address 1.1.1.3/24 vrrp-group 1 accept-data

- As mentioned above 'track' is used for interface monitoring and subtracts the priority cost for priority if the interface goes down. Rememeber even after subtraction the priority cannot go in -ve. set interfaces fe-0/0/0 unit 0 family inet address 1.1.1.3/24 vrrp-group 1 track interface fe-0/0/1 priority-cost 100Verification:

Master Node:------------------ root@Master> show vrrp brief Interface State Group VR state VR Mode Timer Type Addressfe-0/0/0.0 up 1 master Active A 0.724 lcl 1.1.1.2 vip 1.1.1.1 root@Master> show vrrp track Track Int State Speed VRRP Int Group VR State Current priofe-0/0/1.0 up 100m fe-0/0/0.0 1 master 200 root@Master> show vrrp detail Physical interface: fe-0/0/0, Unit: 0, Address: 1.1.1.2/24 Index: 75, SNMP ifIndex: 502, VRRP-Traps: disabled Interface state: up, Group: 1, State: master, VRRP Mode: Active Priority: 200, Advertisement interval: 1, Authentication type: md5 Delay threshold: 100, Computed send rate: 0 Preempt: yes, Accept-data mode: yes, VIP count: 1, VIP: 1.1.1.1 Advertisement Timer: 0.185s, Master router: 1.1.1.2 Virtual router uptime: 20:56:41, Master router uptime: 20:37:55 Virtual Mac: 00:00:5e:00:01:01 Tracking: enabled Current priority: 200, Configured priority: 200 Priority hold time: disabled Interface tracking: enabled, Interface count: 1 Interface Int state Int speed Incurred priority cost fe-0/0/1.0 up 100m 0 Route tracking: disabled

root@Master> show vrrp extensive Interface: fe-0/0/0.0, Interface index :75, Groups: 1, Active :1 Interface VRRP PDU statistics Advertisement sent :84472 Advertisement received :743 Packets received :743 No group match received :0 Interface VRRP PDU error statistics Invalid IPAH next type received :0 Invalid VRRP TTL value received :0 Invalid VRRP version received :0 Invalid VRRP PDU type received :0 Invalid VRRP authentication type received:0 Invalid VRRP IP count received :0 Invalid VRRP checksum received :0

Physical interface: fe-0/0/0, Unit: 0, Address: 1.1.1.2/24 Index: 75, SNMP ifIndex: 502, VRRP-Traps: disabled Interface state: up, Group: 1, State: master, VRRP Mode: Active Priority: 200, Advertisement interval: 1, Authentication type: md5 Delay threshold: 100, Computed send rate: 0 Preempt: yes, Accept-data mode: yes, VIP count: 1, VIP: 1.1.1.1 Advertisement Timer: 0.665s, Master router: 1.1.1.2 Virtual router uptime: 20:56:56, Master router uptime: 20:38:10 Virtual Mac: 00:00:5e:00:01:01 Tracking: enabled Current priority: 200, Configured priority: 200 Priority hold time: disabled Interface tracking: enabled, Interface count: 1 Tracked interface: fe-0/0/1.0 Interface state: up Speed: 100m Incurred priority cost: 0 Threshold Priority cost Active down 200 Route tracking: disabled Group VRRP PDU statistics Advertisement sent :84472 Advertisement received :743 Group VRRP PDU error statistics Bad authentication Type received :0 Bad password received :0 Bad MD5 digest received :0 Bad advertisement timer received :0 Bad VIP count received :0 Bad VIPADDR received :0 Group state transition statistics Idle to master transitions :0 Idle to backup transitions :1 Backup to master transitions :2 Master to backup transitions :1

Backup Node: ------------------- root@Backup> show vrrp brief Interface State Group VR state VR Mode Timer Type Addressfe-0/0/0.0 up 1 backup Active D 3.507 lcl 1.1.1.3 vip 1.1.1.1 mas 1.1.1.2

root@Backup> show vrrp track Track Int State Speed VRRP Int Group VR State Current priofe-0/0/1.0 up 100m fe-0/0/0.0 1 backup 100

root@Backup> show vrrp detail Physical interface: fe-0/0/0, Unit: 0, Address: 1.1.1.3/24 Index: 72, SNMP ifIndex: 527, VRRP-Traps: disabled Interface state: up, Group: 1, State: backup, VRRP Mode: Active Priority: 100, Advertisement interval: 1, Authentication type: md5 Delay threshold: 100, Computed send rate: 0 Preempt: yes, Accept-data mode: yes, VIP count: 1, VIP: 1.1.1.1 Dead timer: 2.651s, Master priority: 200, Master router: 1.1.1.2 Virtual router uptime: 02:11:02 Tracking: enabled Current priority: 100, Configured priority: 100 Priority hold time: disabled Interface tracking: enabled, Interface count: 1 Interface Int state Int speed Incurred priority cost fe-0/0/1.0 up 100m 0 Route tracking: disabled

root@Backup> show vrrp extensive Interface: fe-0/0/0.0, Interface index :72, Groups: 1, Active :1 Interface VRRP PDU statistics Advertisement sent :0 Advertisement received :8890 Packets received :8890 No group match received :0 Interface VRRP PDU error statistics Invalid IPAH next type received :0 Invalid VRRP TTL value received :0 Invalid VRRP version received :0 Invalid VRRP PDU type received :0 Invalid VRRP authentication type received:0 Invalid VRRP IP count received :0 Invalid VRRP checksum received :0

Physical interface: fe-0/0/0, Unit: 0, Address: 1.1.1.3/24 Index: 72, SNMP ifIndex: 527, VRRP-Traps: disabled Interface state: up, Group: 1, State: backup, VRRP Mode: Active Priority: 100, Advertisement interval: 1, Authentication type: md5 Delay threshold: 100, Computed send rate: 0 Preempt: yes, Accept-data mode: yes, VIP count: 1, VIP: 1.1.1.1 Dead timer: 3.339s, Master priority: 200, Master router: 1.1.1.2 Virtual router uptime: 02:11:08 Tracking: enabled Current priority: 100, Configured priority: 100 Priority hold time: disabled Interface tracking: enabled, Interface count: 1 Tracked interface: fe-0/0/0.0 Interface state: up Speed: 100m Incurred priority cost: 0 Threshold Priority cost Active down 100 Route tracking: disabled Group VRRP PDU statistics Advertisement sent :0 Advertisement received :8890 Group VRRP PDU error statistics Bad authentication Type received :0 Bad password received :0 Bad MD5 digest received :0 Bad advertisement timer received :0 Bad VIP count received :0 Bad VIPADDR received :0 Group state transition statistics Idle to master transitions :0 Idle to backup transitions :1 Backup to master transitions :0 Master to backup transitions :0

Remember VRRP is a Stateless High Availability Protocol for SRX Devices. In order to have a Stateful High Availability please goto KB21905.Purpose:

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