What are the default timers for HSRP?

The default hold time is 10 seconds for both versions of HSRP (v1 and v2), which is roughly three times the default hello time. The hold time has to be sufficiently larger than the hello time to ensure that the standby router does not take over the active role every time there’s a short communication break.

Do HSRP timers need to match?

Timers on all routers must match. HSRP requires layer 2 connectivity between routers.

How many switches can be in HSRP?

How many groups and how many switches in one group can be configure in HSRP? The Catalyst 3550 support a maximum of 16 unique group numbers. Option for group Id is 0 to 255 but you can configure just 16 groups. Maximum umber of router/Switches in a group will depend on subnet mask you are using on the interface.

How do I configure HSRP protocol?

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 value in HSRP?

How to configure HSRP on Cisco IOS? Router with the the highest priority become the Active Router immediately. Priority is determined first by the value that is configured at the interface, and then by highest interface IP address. Default priority is set to 100.

How many routers can participate in HSRP?

HSRP allows you to configure two or more routers as standby routers and only a single router as an active router at a time. All the routers in a single HSRP group shares a single MAC address and IP address, which acts as a default gateway to the local network.

Why we use preempt in HSRP?

If we want a specific router to always assume the role of an Active HSRP Router whenever it’s up and running, Then, we can use HSRP Preempt. Preemption is important if we have routers with bigger resources, higher bandwidth, or less latency over the other routers in our network.

How many routers are in HSRP group?

HSRP allows you to configure two or more routers as standby routers and only a single router as an active router at a time.

How do I configure HSRP between two routers?

HSRP Configuration Overview:

  1. Decide a virtual address to use for the HSRP address.
  2. Decide which router is to be the primary router.
  3. Optionally you can also enable preemption on the router using below command.
  4. Configure tracking, authentication, and timers on the primary router using the following commands:

What is HSRP configuration?

HSRP is configured between two devices which each have a single interface that goes towards the core of the network, an interface that connects them together (not an HSRP requirement), and an interface that connects into a common subnet.

Can 2 HSRP routers become active active?

In HSRP, two or more routers give an illusion of a single virtual router. This allows you to configure two or more routers as standby routers and only a single router as the active router.