Refer to the exhibit. The external subnet and internal EPG1 must communicate with each other, and the L3Out traffic must leak into the VRF named “VF1”. Which configuration set accomplishes these goals?
A.
External Subnets for External EPG
Import Route Control Subnet - Shared Route Control Subnet
B.
External Subnets for External EPG
Shared Route Control Subnet - Shared Security Import Subnet
B. External Subnets for External EPG / "For all subnets received by the L3Out, this option declares (selects) which of these subnets should be associated with this External EPG
Once declared subnets are associated with this External EPG, the contracts applied to this External EPG then determine with which other EPGs the specified external subnet is allowed to communicate."
Shared Route Control Subnet - used to permit route leaking from the L3Out VRF to other VRF’s in the same or different tenants.If the declared subnet in the External EPG is in the L3Out VRF and has been learned from outside the fabric it can be leaked to the other VRFs where contracts exist.
Shared Security Import Subnet - This option applies the specified contract on the prefix within the VRF that has had the prefixed leaked\advertised into (leaking done by Shared Route Control Subnet).
If you want traffic to flow from one external EPG to another external EPG or from one external EPG to another internal EPG, the subnet must be marked with this control.
https://haystacknetworks.com/aci-l3out-subnet-options
upvoted 2 times
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kamkol
6 months, 2 weeks ago