Router A connects to Router B and C with a 2.5 POS circuit respectively. Router A is the router reflector of B and C while B and C have advertised the same ip address blocks to the router reflector A. The feature of maximum path has been enabled on IBGP and IS-IS and I have verified the per-destination sharing works fine when the command "show ip cef x.x.x.x" is issued. But what's curious is that the traffic from A to B and C is only carried on the circuit of A->B, the circuit of A->C has little output traffic. When I increase the isis metric of A->B, all traffic will transit to the circuit A->C soon. Except that the linecard of A-B is a 4-port 2.5G POS Engine 4 card while the linecard of A->C is a SIP 601 Engine 5 card, all physical parameters and configuration of these two circuits are same.
Is there anything else I might have not noticed? Any reply will be appreciated, thanks in advance.