I think two layer ECMP links are being used here, both of which are in the IGP. Are you running MPLS over these links too?
The ME3600 is able to ECMP over any number of links as far as I know (up to the max, which is 8 or 16) however I think the ASR920 will only ECMP over 4 or 8 links (so not 2 as in your case). This could be the problem here. Could you also try to change the CEF load balancing algorithm (assuming this is ECMP and not LAG, this won't affect a LAG): ASR920(config)#ip cef load-sharing algorithm ? include-ports Algorithm that includes layer 4 ports original Original algorithm tunnel Algorithm for use in tunnel only environments universal Algorithm for use in most environments If it is a LAG then on the ASR920 try to adjust these options: ASR920(config)#port-channel load-balance-hash-algo ? dst-ip Destination IP dst-mac Destination MAC src-dst-ip Source XOR Destination IP Addr src-dst-mac Source XOR Destination MAC src-dst-mixed-ip-port Source XOR Destination Port, IP addr src-ip Source IP src-mac Source MAC If you're running MPLS over the LAG the ASR920 can hash MPLS over the LAG and the ASR920 should hash over 2 links just fine. Cheers, James. _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/