What the Main Difference between HSRP, VRRP and GLBP Protocols

In this article we will cover comparison of various first hop redundancy protocols. HSRP, VRRP and GLBP are the main three first hop redundancy protocols. In order to take the right decision for your network you should know the basics regarding all three.

The following chart provides difference HSRP Vs VRRP Vs GLBP protocols.

Difference between HSRP, VRRP and GLBP Protocols

Protocol Features HSRP VRRP GLBP
Scope Cisco Proprietary IEEE standard Cisco proprietary
Standard RFC2281 RFC3768 none
OSI Layer Layer-3 Layer-3 Layer-2
Load Balancing No No Yes
Multicast Group IP address 224.0.0.2 in version 1224.0.0.102 in version 2 224.0.0.18 224.0.0.102
Transport Port Number UDP 1985 UDP 112 UDP 3222
Timers Hello – 3 sec Advertisement – 1 sec Hello – 3sec
Hold – 10 sec Master down time = 3*Advertisement Time + Skew TimeSkew Time = (256-            Priority)/256 Hold – 10sec
Election Active Router:1.Highest Priority2. Highest IP address (Tiebreaker) Master Router: (*)
1-Highest Priority
2-Highest IP (Tiebreaker)
Active Virtual Gateway:
1-Highest Priority
2-Highest IP (Tiebreaker)
Router Role -One Active Router, one Standby Router-one or morelistening Routers – One Active Router- One or More Backup Routers – One AVG (Active Virtual Gateway)- up to 4 AVF Routers on the group (Active Virtual Forwarder) passing traffic.- up to 1024 virtual Routers (GLBP groups) per physical interface.
Preempt If Active Router(Highest Priority) is down and up again, Preempt should be configured to become a Active Router again  By default Preempt is ON in VRRP, If Active Router is down and up again, It will automatically become a MasterRouter If Active Router(Highest Priority) is down and up again, Preempt should be configured to become a Active Router again.
Group Virtual Mac Address 0000.0c07.acxx 0000.5e00.01xx 0007.b4xx.xxxx
IPv6 support Yes No Yes

Note: In VRRP group, Router which is configured group as a real IP will become a Active Router, IOS will manage to make the VRRP Router with the real IP, the master, by setting its priority to 255, knowing that the configurable range is [1-254].

Network Resources from CISCO logo.com

More Related Cisco Network Tips:

First Hop Redundancy Protocols in IPv6 HSRP + GLBP

Cisco First Hop Redundancy Protocols: HSRP, VRRP, GLBP

How to Configure GLBP?

To Know VRRP Basic Configuration

Tutorial of HSRP Basic Configuration

GLBP & GLBP Basic Configuration

How to Configure GLBP in Cisco IOS Routers?

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