Having some problems with our environment and trying to rule out configuration issues with our Netapp. I read some older documentation or blog postings and after looking at my rc file I want to confirm that indeed this is configured correctly. The reason I am asking is to make sure our network infrastructure is setup correctly as well. We got v3140 Netapp connected to the network thru Cisco Nexus 2000 switches. We use port channels/LACP, but ran into issues when moving ports between physical switches. The networking group had problems bringing the port channels back up saying their switches would need to see LACP traffic first. However, with the Netapp in failover state there would be no LACP traffic coming naturally until a giveback operation would be initiated. However, that felt like flying blind a bit not knowing if those ports would actually come up. Here is what I have in my rc file:
You interface group is set to LACP. It is impossible to answer whether "settings are correct" without knowing the whole environment; in particular, Jumbo frames have to enabled on switches and communication partners as well.
There are contradictory theories about flow control. I did see some strange phenomenon which (in hindsight) could be explained by lack of flow control - disruption of NFS over UDP. Problem went away after we switched to TCP ... which incidentally has own flow control and reliable delivery. So I would enable flow control (again do not forget to enable it on switches too ...) until some evidence that it is causing issues.
I do not understand what do you mean under "moving ports between physical switches". Could you elaborate?
We were told that the ports on the Nexus 2Ks would not be "as equal" as the ports on the 5Ks and so it was decided to move the Netapp ports to the 5Ks accordingly.
Jumbo frames are configured as a global setting on the physical switches (according to my networking group). They are also configured in VMware (which is housed on this particular environment) and vmkping's with the appropriate frame size are passing through fine.
Unfortunately I do not have access to the port configuration on the Nexus switches.
On N5k you have flowcontrol send off, but flowcontrol receive is on - so it matches NetApp setting flowcontrol send (in other words, flow control is on when NetApp is sending & 5k receiving, not the other way around)
It is a bit hairy subject with very sparse documentation, but you can have a look at this TR, page 27: