06-02-2022 10:40 AM
hi all,
is it possible to assign a server or switch non cisco to a vPC and not a standard port channel
i have two nexus 7000 and want to connect a switch or server to both via a vPC and not via a port channel
is this possible?
thanks,
rob
Solved! Go to Solution.
06-03-2022 06:58 AM
Hi Robert!
If a device (whether it's a server, switch, router, or anything in between) supports port-channels (also sometimes called EtherChannels, Link Aggregation Groups [LAGs], bonds, etc.) using either LACP (Link Aggregation Control Protocol) or statically (meaning, no protocol is used to orchestrate port-channel members and coordinate bringing the link up), then you can connect the device to two Nexus switches in a vPC domain using a vPC.
One of the strategic advantages of vPC is that the vPC domain is transparent to the device connected through a vPC. In other words, the vPC-connected device (such as your server) has no knowledge that it is physically connected to two different switches. From the vPC-connected device's perspective, it believes it is connected to a single logical device (which is what the vPC domain emulates, even though in reality, the vPC domain consists of two separate Nexus switches).
If the Nvidia Mellanox ConnectX-4 NICs you plan on using support LACP or the operating system you plan on running on the server supports LACP, then you can connect the server to both of your Nexus switches through a vPC. For what it is worth, most hosts and operating systems created within the past decade will support LACP (and, therefore, can be connected to the network through a vPC).
I hope this helps - thank you!
-Christopher
06-02-2022 10:43 AM
if SW or Server not support ether channel then you can use
non-vPC VLAN, this make two nexus peer behave like any traditional SW.
06-02-2022 10:53 AM
basically i have a hp server, i want to connect it to both nexus 1 and nexus 2
so nexus 1 will have
po1 configured in a vpc
nexus2 will have
po1 configured in a vpc
so if nexus 1 goes down the server can still be contacted and will work via nexus 2
will the servers NIC have to support vpc for this to work?
06-02-2022 02:31 PM
can I know the model of HP server?
06-02-2022 02:42 PM
We put Nvidia mellanox connect x4 cards in them, I've heard if there compatible with LACP they should work, is that correct ?
06-03-2022 06:58 AM
Hi Robert!
If a device (whether it's a server, switch, router, or anything in between) supports port-channels (also sometimes called EtherChannels, Link Aggregation Groups [LAGs], bonds, etc.) using either LACP (Link Aggregation Control Protocol) or statically (meaning, no protocol is used to orchestrate port-channel members and coordinate bringing the link up), then you can connect the device to two Nexus switches in a vPC domain using a vPC.
One of the strategic advantages of vPC is that the vPC domain is transparent to the device connected through a vPC. In other words, the vPC-connected device (such as your server) has no knowledge that it is physically connected to two different switches. From the vPC-connected device's perspective, it believes it is connected to a single logical device (which is what the vPC domain emulates, even though in reality, the vPC domain consists of two separate Nexus switches).
If the Nvidia Mellanox ConnectX-4 NICs you plan on using support LACP or the operating system you plan on running on the server supports LACP, then you can connect the server to both of your Nexus switches through a vPC. For what it is worth, most hosts and operating systems created within the past decade will support LACP (and, therefore, can be connected to the network through a vPC).
I hope this helps - thank you!
-Christopher
06-03-2022 07:04 AM - edited 06-03-2022 07:07 AM
do you get any doc. that HP port channel protocol compatible with LACP of Nexus ? that is concern here.
anyway I find this link take look.
https://www.techieshelp.com/hp-and-cisco-link-aggregation-guide/
06-03-2022 07:09 AM
No I'm going to look into wether mellanox cards support lacp
06-03-2022 07:16 AM
from this guide for mellanox it support LACP
but again I don't have any doc. from cisco about the compatibility.
06-03-2022 07:21 AM
Thanks guys,
Is there a good how to on how to make a new vpc for this, also do I need the heartbeat link for this or not ?
As the main vpc to connect the two nexuses have got one vpc link and also a heartbeat link
06-03-2022 07:30 AM
heartbeat is one for all vPC.
you need only one heartbeat for whatever you have vPC.
06-03-2022 07:31 AM
for first Q can you more elaborate ?
06-06-2022 05:03 AM
oh ok so i have one heartbeat link to nexus to nexus, so i dont need another heartbeat link from nexus to server?
06-06-2022 05:06 AM
is there a good how to ie link on how to set up a vpc
06-06-2022 02:16 PM - edited 06-06-2022 02:17 PM
Yes
first double BW
second no need to wait STP process to make port FWD, both port is FWD even if it connect to different SW "i.e. STP not BLK one port".
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