I have two catyst 6509 with sup1 and msfc (referer Cat-A e Cat-B) with Layer 3 feature. There is a ospf process configured on Cat-a e cat-b in standard area 51. Every Cat has a netwotk p2p betwen Cat (svi vlan94) and a netwtork p2p to the same core (svi vlan 990 cat-a and svi vlan 989 cat-b) . There is a network (external type 2) that the two Cat receiving but:
show ip route
O E2 184.108.40.206 [110/100] via 220.127.116.11, 00:10:45, Vlan990
[110/100] via 18.104.22.168, 00:10:45, Vlan74
O E2 22.214.171.124 [110/100] via 126.96.36.199, 00:03:38, Vlan989
Why is there only one entry in cat-b?
Is there an algorithm in ospf to avaoid routing loop?