Which First Hop Redundancy Protocol is an IEEE Standard?

Which First Hop Redundancy Protocol is an IEEE Standard?
A . GLBP
B . HSRP
C . VRRP
D . OSPF

View Answer

Answer: C

Explanation:

A comparison of the three First Hop Redundancy Protocols are listed below:

GLBP

HSRP VRRP

Protocol (Gateway Load (Hot Standby Router (Virtual Redundancy Features Balancing Pro-protocol) Router Protocol) tocol)

1 AVG (Ac-tive Virtual Gateway).- up to 4 AVF routers on the

1 active router.- 1 group (Active -1 master router.

– 1 standby router.- 1 or Virtual For-or more backup more listening warder) passing routers. routers. traffic.- up to Router role 1024 virtual routers (GLBP groups) per physical inter-face.

-Can use real router

-Use virtual ip ad- ip address, if not, the – Use virtual ip dress. one with highest pri- address. ority become master. Cisco propri-Scope Cisco proprietary IEEE standard etary Active Virtual Active Router: Master Router: (*) Gateway: 1-Highest Priority 1-Highest Priority 1-Highest Pri-Election 2-Highest IP 2-Highest IP ority (tiebreaker) (tiebreaker) 2-Highest IP (tiebreaker)

Tracking yes yes yes

Optimization Preempt yes yes yes features Timer ad-yes yes yes justments Traffic type 224.0.0.2 udp 1985 224.0.0.18 IP 112 224.0.0.102 udp (version1) 3222 224.0.0.102-udp 1985 (version2) Advertisement 1 Hello 3 sec-Hello 3 seconds second onds (Master Down Inter-Timers val)3 * Advertisement (Hold) 10 sec­

+ skew time (Hold) 10 seconds onds (Skew time)(256-pri-ority) / 256 Load-balancing oriented-Weighted algo­-Multiple HSRP – Multiple VRRP rithm.- Host-de-group per in- group per in-pendent algo-terface/SVI/routed terface/SVI/routed rithm. int. int.

-Round-Robin algorithm (de-fault). Load-balancing functional-Clients are ity transparently updated with Requires appropriate Requires appropriate virtual MAC distribution of Virtual distribution of Virtual according to GW IP per Clients for GW IP per Clients for load-balancing optimal load-balanc- optimal load­balanc-algorithm ing.(generally through ing.(generally through through ARP DHCP) DHCP) requesting a unique virtual gateway.

Reference: http://cciethebeginning.wordpress.com/2008/08/23/router-high­availability-protocol- comparison-2/