We have the following setup
C1 and C2 are Core Routers peering with same ISP through ebgp and ospf peering with D1 and E1. There is no firewall between C's and E but there is active/passive setup between C's and D. Now, let's assume D1 is advertising 188.8.131.52/22 and 184.108.40.206/24 networks to C's which is intern advertising in BGP to the world. My understanding is we would announce those two network statement's and bunch of other networks from E (not 1918) in both the routers C1 and C2 , to better load sharing and redundancy. Will that cause any assymetric routing issues ? If we do announce on both routers, should we expect load sharing on both the routers as both has a GiG Internet Connectivity , or should we tweak in with bgp attributes ?