01-03-2024 06:48 AM
Hi, I have an ACI network that has three L3 Outs over two sites. Site A has two L3Outs that are both learning and advertising routes and another on Site B which is learning routes from the core into the fabric, but I cannot work out why it will not advertise Bridge Domains out to the core. All the L3 outs are in the same VRF.
If I login to the leaf switch on Site B, I can see subnets within ACI.
LEAF_106#
192.168.14.64/28, ubest/mbest: 1/0, attached, direct, pervasive
*via 172.16.104.65%overlay-1, [1/0], 03w00d, static
I can also see routes being learned from the core network
LEAF_106#
192.168.129.254/32, ubest/mbest: 1/0
*via 172.16.131.80, eth1/2, [110/6], 02w02d, ospf-default, intra
But I dont see the ACI routes being advertised from ACI into the core.
I dont want routes from the LAN on site A to be advertised through ACI (transit network) just routes with ACI to be available at both sites.
I am stuck here, so I really would be grateful for any help.
Many thanks,
Jonathan
Solved! Go to Solution.
01-04-2024 02:32 AM
@Ruben CochenoHi Ruben, thanks for your reply. I found the problem this morning, the LEAF switch at the secondary site had the same OSPF router ID as a new switch that had just been installed. The second I changed the router ID all the routes popped in.
Thansks for taking the time out to help.
Jonathan
01-03-2024 10:47 AM
It can be a variety of things really, without going into much detail check if those BDs have the checked Advertised Externally, Check the guide here https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/example-files/l3out-configuration-examples/l3out-configuration-examples/m-ospf-l3out-with-two-external-routers.html
01-04-2024 02:32 AM
@Ruben CochenoHi Ruben, thanks for your reply. I found the problem this morning, the LEAF switch at the secondary site had the same OSPF router ID as a new switch that had just been installed. The second I changed the router ID all the routes popped in.
Thansks for taking the time out to help.
Jonathan
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