From: JB (barrerj1@hotmail.com)
Date: Tue Oct 12 2004 - 11:51:08 GMT-3
Additonally, GLBP is supported by the following platforms
GLBP - Gateway Load Balancing Protocol
----------------------------------------------------------------------------
----Gateway Load Balancing Protocol (GLBP) protects data traffic from a failed router or circuit, like Hot Standby Router Protocol (HSRP) and Virtual Router Redundancy Protocol (VRRP), while allowing packet load sharing between a group of redundant routers.
Feature Specifications for the Gateway Load Balancing Protocol
Feature History Release Modification 12.2(14)S This feature was introduced. 12.2(15)T This feature was integrated into Cisco IOS Release 12.2(15)T Supported Platforms Cisco 1700 series, Cisco 2600 series, Cisco 3620, Cisco 3631, Cisco 3640, Cisco 3660, Cisco 3725, Cisco 3745, Cisco 7100 series, Cisco 7200 series, Cisco 7400 series, Cisco 7500 series HTH JB
-----Original Message----- From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Lukasz Bromirski Sent: Tuesday, October 12, 2004 5:47 AM To: ccielab@groupstudy.com Subject: Re: What different between GLBP and HSRP
Nico van Niekerk wrote: >>In HSRP group You have one active forwarder, whereas in GLBP You can >>have multiple ones. In HSRP You can of course make more than one >>group, but this will require subnetting, which is not always feasible >>or possible. > Why do you need subnetting when using more than one group? Can't you > assign > 2 different addresses from the same network to 2 different standby groups?
Well, You can, but You have two different default gateways configured for the subnet - which, if coupled with for example not-that-quite proficient help desk people may effect in more errors, confusion, or situations were during "problem solving" one virtual IP will be choosen more often that the other, and this will break load-balancing of traffic between gateways.
When You do separate subnet for each HSRP group, there's always one default gateway (be it .1 for /24 subnets) - so, no confusion. Also, planning of load balancing is somewhat easier - You usually do know how many PCs will be there for a given subnet.
And that are just notes from real life. Technically, You can of course do two HSRP groups in one subnet and provide two (or more) gateways from it.
-- this space was intentionally left blank | #ukasz Bromirski you can insert your favourite quote here | lukasz:bromirski,net
This archive was generated by hypermail 2.1.4 : Sat Nov 06 2004 - 17:11:46 GMT-3