10-08-2024 12:55 AM
Hello. I am trying to figure out route summary between Tenant or VRF. Let's say I have Tenant1:VRF1 and Tenant2:VRF2. VRF1, let's say have like 1000 10.x.x.x subnets. Then in VRF2, you have an external vendor that would need to monitor your entire network. So basically, initial implementation is to leak all 1000 VRF1 routes to VRF2 and leak VRF2 subnet into VRF1, to have bidirectional connectivity. However, what if I just want to summarize all of these 1000 subnets into something like 10.0.0.0/8 into VRF2. I can't seem to find the knob on where to configure that. I know there's a knob for L3Out interfaces so that only a summary route can be advertised to an L3Out peer, let's say BGP. But any tweak that can be used to suppress all the 1000 subnets from being injected to VRF2 and just redistribute a 10/8? I have tried to add a static route to null0 for 10.0.0.0/8 and defined it as external route to be redistributed to VRF2. But yes, VRF2 can see the 10/8 route but it's also pointing to null0, unlike the BD subnets that point to the anycast IP of overlay-1 VRF. VRF2 EPG being the contract provider and VRF1 EPG being the consumer. Any idea how this can be done? Thank you.
10-14-2024 02:21 AM
Dear @jpl861 , from your explanation I have tried to draw what I have understood. Please correct if need:
As part of solution:
Would appreciate if you could give more clarity w.r.t. number of EPGs and subnets as defined in them.
Note: Yes, you might need to define subnet gateway inside EPG as this is Inter Tenant communication.
04-25-2025 12:46 AM
Hello. Sorry I didn't see this thread for a long time. Yes, the topology is something like that. I have reached out to someone who's doing ACI and I was told that there is no way to summarize the smaller subnets prior to leaking it out to the other tenant:vrf.
04-25-2025 02:42 PM
Hi @jpl861 ,
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