Hi,
I have interesting case on my lab when using topology as picture attached. There is SWL3, R1, R2, and R3 with these conditions:
- SWL3, R1, and R2 are in same OSPF area
- R1, R2, and R2 are in same EIGRP AS
- R1 and R2 configured with mutual redistribution between OSPF and EIGRP
- R3 has OSPF to its LAN, ie subnet 10.177.95.164/30 (Subnet A)
- R3 WAN interfaces configured with delay 50 and 100 to R1 and R2 respectively
- At first, traffic from SWL3 to R3's subnet A is via R1
- R2 to Subnet A also via R1 (R2 > SWL3 > R1 > R3) even though it has Subnet A route on its EIGRP topology
After that I try to shutdown R3 interface to R1 (red link), this is what happen:
- SWL3 to Subnet A route change to via R2 (as espected)
- R1 also have same behaviour like R2 before, its has Subnet A on its EIGRP topology but install route from OSPF on its routing table
- Traffic from R3 to SWL3 also move to via R2
Next, I try to turn on R3 red link again, this is what happen:
- Traffic from R3 to SWL3 move back to via R1
- Traffic from SWL3 to Subnet A still via R2
From this trial, I assume that delay configuration on R3 only affecting routes received by R3 but not influencing routes that R3 send to other. Is it correct?
Also, do you have any idea how to move back traffic from SWL3 to via R1 again when its link go up? I tried to modify metric on OSPF and EIGRP on R1 and R2, but it only change FD value on show ip eigrp topology. But on routing table, SWL3 still choose R2 for traffic destined for Subnet A.
