We have some large sites which have 2 x routers, both with separate WAN links.
For the most part, one of these WAN links is never used and is a waste of bandwidth.
We're looking at implementing Gateway Load Balancing Protocol (GLBP) on these sites in EMEA and just want to understand how this will work where we have EIGRP running between our LAN switches (Layer 3 cards) and the WAN routers.
Usually, EIGRP will prefer one route in/out of the site but we'd like to take advantage of the unused bandwidth on the second WAN link by configuring GLBP on the LAN interfaces of the WAN routers.
Can anyone advise how we configure EIGRP to use the Virtual address configured for GLBP on the WAN routers (Ethernet interface) so traffic is load balanced across both WAN links.?
Network would look something like this:
* Please Note: All hosts are using a HSRP default g/w on the L3 switches.
L3 switch <-----EIGRP-----ï Router-1 -------ï WAN Link-1
L3 switch <-----EIGRP-----ï Router-2 -------ï WAN Link-2