HSRP Active, Active

[rafrancis]

Does anyone know how to configure HSRP in Active, Active mode on two different routers, using the same (one) virtual gateway IP.  I would like to load balance traffic going to two different routers.

[bmcginn]

Hi There,

Unfortunately HSRP doesn't load balance.  GLBP (Gateway Load Balancing Protocol) is your friend though.

HSRP uses a mac address for the VIP; that mac address is gleaned from the standby group number that is on the interfaces of the participating routers.  Each router in the group must have the same group ID.  That group ID is instrumental in getting the mac address for the VIP that is associated to that group.  The mac address will look like 0000.0c07.acxx (where xx is the group number it can be 1-256 in decimal).  As the mac will follow the IP, and HSRP (Hot STANDBY Router Protocol) has only one active router at any time it works fine.  The mac can't be on both routers at the same time and be active.

GLBP works similar except the gateways give out a different mac address for the same VIP, so that it can be load balanced across the participating routers.  This page will give you a load more information.  http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html

Brad

[cadet alain]

Hi,

You can't load balance with HSRP but you can do load sharing.

take a look here: http://www.cisco.com/en/US/tech/tk648/tk362/technologies_configuration_example09186a0080094e90.shtml

Regards.

Alain.