You need to create an implementation plan for providing Layer 3 redundancy in your switched network. You included Hot Standby Routing Protocol (HSRP) as the protocol to avoid first-hop router failure. However, your supervisor suggests including Virtual Router Redundancy Protocol (VRRP) instead of HSRP in the implementation plan.Which of the following statements is TRUE about the reasons for the suggested change in the implementation plan? (Choose two.)

• 300-420 : All Parts

The following two statements are TRUE:

• HSRP works only on Cisco routers and VRRP works on both Cisco and non- Cisco routers.
• HSRP-enabled routers need to be configured manually to preempt the active router and VRRP-enabled routers preempt it automatically.

HSRP was developed by Cisco intended for only Cisco routers and VRRP was developed by IEFT intended as a standard for routers. HSRP was defined in RFC 2281 and VRRP was defined in RFC 2338. Both these protocols provide a fault tolerance solution by grouping several routers together but presenting them as a single router. One of the routers in the group acts as the active or master router. A second router is selected as the standby router. In case the active or master router fails, the standby router takes over the responsibilities of the active router.

The router with the highest priority is automatically selected as the active or master router. In HSRP, preempt settings have to be manually configured on every router in the group, even if the routers have a priority higher than that of the active router. However, in VRRP, the routers with higher priority automatically preempt the master router. Another advantage that VRRP has over HSRP is a faster Hello timer (1 second). HSRP has a Hello timer of 3 seconds

Two other protocols ICMP Router Discovery Protocol (IRDP) and Gateway Load Balancing Protocol (GLBP) provide redundancy for first-hop router failure. IRDP also allows the selection of a new router if the active router fails, while GLBP provides load balancing in addition to redundancy.

Objective:
Infrastructure Services
Sub-Objective:
Configure and verify first-hop redundancy protocols

• 300-420 : All Parts