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sandy16
Altostratus
AltostratusF5 and Cisco Nexus VPC
Hi, my network design is as follows: I have a pair of F5-ltms connected to a pair of nexus 5k. In other words, each ltm is dual connected to both the cisco n5ks in a vpc-fashion. My N5ks are purely layer-2, and all the layer-3 is handled on a one hop up by on a different set of switches. Are there any special recommendations to this design? As F5 uses "auto last hop" feature by default, so I believe it will always reply back to individual mac-address of the n5k instead of the vpc-system-mac. Is this correct? Has anyone seen any issues in this..?
1 Reply
Josh_AbaireNimbostratus
Why would the F5 ever reply to the 5k? If the 5k is strictly layer 2, it would be replying to the MAC of the layer 3 address. The only issue is when the 5k has a VPC to the layer 3 device such as a 7k and it is running HSRP. You'll want to have peer-gateway enabled since you cannot control if that traffic destined to that MAC will hit the A side or the B side and the 7k will not forward that traffic across the vPC peer-link.
