Hi Group, I have a problem regarding load balancing distance vector protocols namely RIP I and IGRP. I have 2x2500 routers connected via their serial interfaces respectively, s0->s0 & S1->S1. I have another router hanging off one of these Ethernet ports just to add some dimension to the network. It makes no difference wether or not I am in fast-switching mode or process-switching mode (no ip route-cache) the same debug output is generated for a 1000 ip ping test. Roughly speaking the load balancing appears as 50 ish packets through S0 and then 50 ish through S1. This is NOT what I expected !!! I thought that in process-switch mode the packets would alternate (S0,S1,S0,S1) etc. And that in fast switching mode only one of the serial interfaces would be utilised since per destination load balancing would take place. So, in a nutshell, the debug output is the same when using RIP or IGRP also wether process-switched or fast-switched. I've included config's and debug output. I'm wondering though if this is an architectural issue with the 2500 routers having a flat memory space ??? Any thoughts welcome, Regards, Phil ____________________________________________________________ Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]