How does HSRP elect the active router?

How does HSRP elect the active router?

HSRP active/standby router election process uses priority value (0-255) that is manually configured on the router (255 is the highest). By default , the priority is 100 . If all the routers are set to default value then the router with highest IP address on the HSRP interface becomes the active router.

How do I configure HSRP on my router?

To achieve basic HSRP configuration, you need to do the following:

1. Configure normal IP address on interface (cannot be the same as HSRP virtual IP)
2. Bring interface up (no shutdown)
3. Configure HSRP group and virtual IP address using the standby command.

What is the default priority setting on an HSRP router?

100
The default HSRP priority is 100. If you want an HSRP router to be elected as the active router, you should set the priority to a value higher than the default of 100.

What does a standby router do in HSRP?

All the routers in a single HSRP group shares a single MAC address and IP address, which acts a default gateway to the local network. The Active router is responsible for forwarding the traffic. If it fails, the Standby router takes up all the responsibilities of the active router and forwards the traffic. Some important terms related to HSRP :

How does a standby router work in a network?

All the routers in a single HSRP group shares a single MAC address and IP address, which acts a default gateway to the local network. The Active router is responsible for forwarding the traffic. If it fails, the Standby router takes up all the responsibilities of the active router and forwards the traffic.

How does the hot standby router authentication feature work?

The HSRP authentication feature consists of a shared clear-text key contained within the HSRP packets. This feature prevents the lower priority router from learning the standby IP address and standby timer values from the higher priority router.

What should the priority be for a standby router?

Priority : By default, the priority value is 100. It is helpful when the active router comes back after falling down, we can change the priority of standby router (which has become the active router after the original active router is down) to less than 100 therefore it again becomes standby router.