General discussion



By graphco ·
I have implemented
Cisco Glbp protocol in a lan where there was HSRP.

Now the situation is that the balancing is only on the LAN side (60%-40%)but the imput side ( WAN- Serial Interface)is still unbalanced.

This is normal or can I have a balancing also in the input zone?



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by mshavrov In reply to CISCO GLBP PROTOCOL

GLBP protocol will work on LAN side to provde "outbound" Load Balancing. But in most cases it will not work on WAN side.

Just take a look how it works: it creates virtual interfaces and gives a different MAC addresses to different clients. One client accesses the same IP address with one MAC address, and another client with another MAC address.

Most of WAN technologies are based on circuits, not MAC addresses, so, this technology will not work with WAN protocols. However, if you have Frame Relay at the WAN side, you should look for FHRP protocol - it's "HSRP-like" technology for Frame Relay, and it can be combined with GLBP.

Good luck,

Michael Shavrov
CCNP, CCDP, CCSP, Cisco Voice, MCSE W2K, Security+, etc.

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by Frank.Liccardello In reply to CISCO GLBP PROTOCOL

GLBP is a one hop load balancer thats why it works on the LAN side but not the WAN side.

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