How many HSRP groups can you have?

How many HSRP groups can you have?

Hot Standby Router Protocol (HSRP) has 2-versions : version 1 : The messages are multicast at 224.0. 0.2 and uses the UDP port 1985. This version allows group number range from 0 to 255. version 2 : The messages are multicast at 224.0.

How do you troubleshoot HSRP issues?

If the switch is configured for HSRP but does not recognize its HSRP peers, the switch fails to receive HSRP hellos from the neighbor switch. When you troubleshoot this issue, perform the following steps: Check HSRP Verify Physical Layer Connectivity. Check HSRP configurations.

What is the maximum number of HSRP groups can be created in the router?

What is the maximum number of HSRP groups can be created in the router? What are the maximum number of routers can be present in a group? Maximum 16 routers can be present in a group.

What happens when an HSRP active router fails?

What happens when an HSRP active router fails? (Select two.) The HSRP standby router becomes the active router after the holdtime expires on the hello message. Additional HSRP member routers transition from the listen state after the holdtime expires on the hello message.

Which multicast and port numbers correctly match for HSRP choose 2?

HSRP version 1 uses the multicast address 224.0. 0.2, while HSRP version 2 uses the multicast address 224.0. 0.102.

What is a potential disadvantage when implementing HSRP as compared to Glbp?

What is a potential disadvantage when implementing HSRP as compared to GLBP? HSRP does not provide load balancing with multiple active routers.

What is preempt delay?

The preempt delay means that, when the interface gets up it will detect that there is already an hsrp neighbour active. Thus, that active router will continue forward traffic, and this router will wait for configured time until it takes over the role.

How do I debug HSRP?

Debugging HSRP

1. Problem. You want to debug an HSRP problem.
2. Solution. To debug all HSRP error events, use the following command: Router2# debug standby errors.
3. Discussion.

How long does HSRP take to failover?

And you may even be able to use this redundancy to take production routers down during the day because the HSRP failover time is less than 10 seconds. HSRP is a valuable tool for ensuring high availability and router redundancy.

What are the OSPF States?

OSPF routers go through the seven states, called Down, Attempt/Init, Two ways, Exstart, Exchange, Loading and full while building adjacency with other OSPF speaking routers.

What are the two requirements for an HSRP group?

What are two requirements for an HSRP group? (Choose two.) Exactly one active router: Only one Active Router per HSRP group will be elected based on highest priority. In case of equal priority, Highest IP address will be elected as Active Router. One or more standby routers: There can be one or more Standby Routers.

What is HSRP group?

In computer networking, the Hot Standby Router Protocol (HSRP) is a Cisco proprietary redundancy protocol for establishing a fault-tolerant default gateway. The protocol establishes an association between gateways in order to achieve default gateway failover if the primary gateway becomes inaccessible.

What are HSRP version 1 and 2 group numbers?

HSRP Version 1 and 2 HSRPv1 HSRPv2 Group Numbers 0 – 255 0 – 4095 Virtual MAC address 0000.0c07.acXX (XX = group number) 0000.0c9f.fxxx (XXX = group number) Multicast Address 224.0.0.2 224.0.0.102

What are the most common problems with HSRP?

The most common problems are physical layer problems, excessive network traffic caused by spanning tree issues or excessive traffic caused by each Vlan. As with Case Study #1, all the troubleshooting modules are applicable to the resolution of HSRP state changes, particularly the Layer 3 HSRP Debugging.

What happens to the HSRP group if a router fails?

Additional routers in the HSRP group remain in the Listen state. If the active router fails, the standby router takes over as the active router. If the standby router fails or becomes the active router, another router is elected as the standby router. Each standby group emulates a single virtual router (default gateway).

Where does the hello packet come from in HSRP?

The active router sources hello packets from its configured IP address and the HSRP virtual MAC address. The standby router sources hellos from its configured IP address and the burned-in MAC address (BIA). This use of source addressing is necessary so that HSRP routers can correctly identify each other.