VMware Esxi 5.5  Enhanced  LACP LAG  with Nexus Switching plus NetApp LACP LAG

newbie2239
newbie2239 used Ask the Experts™
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*  VMware VDS is Set with Load balancing Mode – Source and destination IP Adress , TCP/UDP port and VLAN .
* Storage is NFS Traffic  with Jumbo Frames  . NetAPP CDOT
* Assuming Nexus is setup properly
* NFS Traffic layer 2 no gateway required
* ESXI Server can ping  NETApp lifs by jumbo
* NetApp cannot  ping back Esxi Hosts on Jumbo

On the Nexus Switches , what is the recommended settings  for the  ESXi Hosts ? I don't necessarily need the command set but recommended settings

IE : Turn off Spanning  Tree ?
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Paul SolovyovskySenior IT Advisor
Top Expert 2008

Commented:
what version of ESXi?

try using vmkping (from the ESXi hosts) with a lower mtu as a test
Commented:
Actually Turns out to be  NetApp Bug with our version of ONTAP.

Bug ID776936
Title ping command to some destinations fails with large packet size
The ping command fails on certain destinations with packet size larger than 1472 bytes and fragmentation disallowed.
The root cause is an internal route MTU is incorrectly set to be too small.
This internal route MTU is not configurable by user configuration commands.
fixed in version:
Data ONTAP 8.2.3 (GA) - Fixed
Data ONTAP 8.3.1 (GA) - Fixed
Data ONTAP 8.3 (GA) - Fixed
newbie2239

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Commented:
Yes

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