Suggested Answer:AD🗳️
10.20.1.0/24 is a BD in ACI because of the part which says "direct, pervasive". For the other answer choice, we see form the administrative distance and the "internal" naming, we know that this is an external subnet (172.16.100.0/24) and that as all external routes are exchanged withing the fabric through MP-BG. MP-BGP is actually used to populate the leaves in the fabric with routing on how to reach those external routes. In MP-BGP, the spines are only the route reflectors. So from this we know that the next hop of the external subnet will be a VTEP of a leaf.
A is correct - 10.20.1.0/24 is a BD in ACI because of the part which says "direct, pervasive".
10.0.8.65 is a loopback IP address of the spine because of the part "static" so E is wrong.
D is correct. 172.16.100.0/16 is an external route redistributed by internal BGP from the boarder leaf so 10.1.1.168.95 is a TEP for the boarder leaf.
The correct answers are A and D!
A - we know that bcs of the "pervasive" in the route
D - D is the correct answer, bcs as we see form the administrative distance, and the "internal" naming, we know that this is an external subnet (172.16.100.0/24) and that as all external routes are exchanged withing the fabric through MP-BG. MP-BGP is actually used to populate the leaves in the fabric with routing on how to reach those external routes. In MP-BGP, the spines are only the route reflectors. So from this we know that the next hop of the external subnet will be a VTEP of a leaf.
As per E - this entry helps to understand the next hop on a Bridge Domain entry (expecially the explanation from user RedNectar)
https://community.cisco.com/t5/application-centric/bridge-domain-subnets-as-static-in-border-lea/td-p/3703352
But in summary, next hop 10.0.8.65 for the ACI BD is actually an IP address of a loopback on the uplink spines of this aci leaf, bcs to reach any hosts in this BD's subnet, the leaf needs to go through any of its spines, which actually know on which leaves those BD's hosts are located.
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