I'm new to UCS, so would appreciate some guidance on connecting a Fabric Interconnect cluster to a pair of N7K's. I understand the benefits of running in end host mode, but need to confirm what the best routing solution for the UCS VLANS would be.
Is it recommended to use a single vPC between the FI and pair of N7K's, running HSRP on each VLAN or use a pair of vPC's across each?
I'd heard that when running HSRP on uplink Switches, you should consider running the FI in switching mode.
Running the Fabric Interconnects in End Host Mode (EHM) is best, that way UCS uplinks are not blocked by STP as they would if you place the Fabrics in Switching Mode.
In the past, we used to recommend customer to run Switching mode for some specific behaviors EHM was not able to handle, but with the newer codes, 2.0 and on, EHM is enough unless you like STP and blocked ports (let's say you are too used to think about STP and its limitations that you don't want to change to EHM).
The way traffic will be sent to the upstream switch depends on the way you pin the virtual interfaces of your server to the uplink ports, there is dynamic pinning (where UCSM decides where uplink port your traffic will travel through) and static pinning (where you can decide what link will be used)
Here you have some good documents for reference in regards to vPC and (this case) UCS:
Introduction This article will help you understand the steps on how to
download the UCS licenses from the Cisco Systems website and then
installing it on the UCS. The redacted (blue lines) just covers up
certain numbers for privacy please do not take them...
Introduction This article will help you understand and educate the
customer on how to clear their "expired licenses"
(license-graceperiod-expired) from their UCS-M. If a customer just
purchased a license and needs a step by step guide on how to download
==================== VIC FNIC driver does not support Virtual Volumes (
second level LUN ID ) An enhancement request has been created to track
this feature - CSCux64473 UPDATE - 12-14-2016 We made some traction on
the enhancement request - The Fix is in t...