How does hsrp work with vpc

I left the server-side of the network purposely vague, to keep the focus on the user PC side of the diagram. For the purposes of the diagram, you can assume the server is single-connected to a 3rd switch which is vPC-connected to the two Nexus switches. I think that will match up with the explanation I provided.

Great Article, Jeremy. Apparantly, we had this happen in our environment recently and i am reading your article after its been fixed. Great read! Hi, thank you from nice and clear article about HSRP and vPC, im not network specialist, but it's nice to know something wha we can face of our complex environment. Thanks once more, I hope to see more articles about Nexus environments and that kind of things, keep on rocking. HI Jeremy, Great explanation, one question. Originally I thought the issue was specific to the 7k, does the 5K now support peer-gateway?

Mark, It does appear that this command is available on the Nexus platform. Is the peer-gateway a command only to be entered on the switch pair that has the HSRP configured on it or throughout all pairs of VPC configured devices ie 5k's with only L2 uplinks? Network Pro, Sorry for the delayed reply.. I hope you weren't waiting on my response! If all the devices connected to the act correctly no packets destined to the physical MAC address but using the HSRP IP address , peer-gateway would not be required.

And netapp servers are connected via Nexus 7K and Data Centers are connected via one 10G link as of now. In Netapp while while copying files from A to B we have loss of keepalives and mismatched Ack's. Many Thanks for your response. Great article, man. The loop prevention rules within vPC cause the receiving switch to drop frames which coming on the peer-link which have its own MAC address as the destination.

I hope this helps, Jeremy. Jeremy, thank U for your solid explanation. I mean that if smth goes wrong with vpc-member link on either N7K and frame arrives for MAC placed behind failed vpc-member on that N7K and this N7K forwards frame to its vpc-peer, the latter will drop the frame? Hello Rene, I know my question is not relevant here since this is not the right platform for this question.

However, it will be really helpful if you or someone else clarifies this. I am going to use the above topology for the questions. I have read somewhere preempt and tracking do not need to be configured in VPC. My questions are mainly about these two things:. Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Showing results for.

Search instead for. Did you mean:. All Community This category This board. Can someone help me understand that? Thanks, N. Labels: Labels: Other Switches. I have this problem too. All forum topics Previous Topic Next Topic.

This is because only the primary switch responds to ARP requests. The data plane refers to traffic that the Nexus switch forwards. For example, traffic from one server to another. Both of the switches forward traffic. Have a look at the MAC table. Notice that the G flag is set for Preemption and delays are not required.

The vPC will forward traffic as soon as the links become available. In a regular HSRP configuration, an admin will tune the timers to enable fast failover. There is also a downside to shortening HRP timers. This increases the load on the control plane. This is not intended to improve performance or stability. It does make one switch responsible for the control plane traffic.