We will be deploying a new Cisco Nexus 5K environment with 2248 FEX's.
The firewall in the environment (non-Cisco), only supports static Port-channels - i.e "ON" configuration and not LACP.
For redundancy we will be patching it into the environment in a topology where VLAN's are trunked and connected to two FEX modules as on page 2 of this document:
Every example I've seen online uses LACP instead of a static Port-channel. My questions are:
Will this cause any issues in the event of port failure?
Is this best practice?
Are there any "gotchas" or caveats with this design?
Many thanks in advance.
I always like to use LACP where and when I can. Some devices, like your firewall and vmware do not support LACP. As long as both devices are configured correctly and using mode-on, there should be no issues with this. I do not like mode-on for this reason, as it does not negotiate anything before bringing up the port-channel. Therefore just confirm it is configured as mode-on on both sides and you should be fine. This should not cause any disruption if one link fails, but I would test the configuration before putting this into production.
You guys sure about this? I am trying to use a UCS-C210-M2 right now with VMWare 5.X and my port channel is not sending traffic. My VMs are not trasmitting data and my port channels are up. I think I may need to take the port channel portion off and try it again. I am running Enhanced vPC right now and this is what I am seeing. I am interested to see if anyone else out there has the actual EvPC working with VMWare across 2 FEX's.