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02-26-2012 03:01 PM
02-26-2012 03:01 PM
Jumbo Frames not working ESXi 4.1 on ML350 and HP2910al
Ok so I have an HP ML350 G6 server connected to two HP2910al switches using iSCSI through two NC360T nics, I have followed the instructions for setting the MTU on all the vswitches and esxcfg-vswitch -l gives the following output:
~ # esxcfg-vswitch -l
Switch Name Num Ports Used Ports Configured Ports MTU Uplinks
vSwitch0 128 8 128 9000 vmnic1,vmnic2
PortGroup Name VLAN ID Used Ports Uplinks
Management Network 0 1 vmnic1,vmnic2
Virtual Machines 0 4 vmnic1,vmnic2
Switch Name Num Ports Used Ports Configured Ports MTU Uplinks
vSwitch1 128 5 128 9000 vmnic3,vmnic0
PortGroup Name VLAN ID Used Ports Uplinks
iSCSI_1 0 1 vmnic0
iSCSI_2 0 1 vmnic3
Switch Name Num Ports Used Ports Configured Ports MTU Uplinks
vSwitch2 128 4 128 9000 vmnic4
PortGroup Name VLAN ID Used Ports Uplinks
Windows iSCSI 0 1 vmnic4
VMkernel 0 1 vmnic4
The HP2910 switches are both set to use an MTU of 9000, the HP "show vlans" command gives the following output:
ProCurve 2910al-24G Switch# show vlans
Status and Counters - VLAN Information
Maximum VLANs to support : 256
Primary VLAN : DEFAULT_VLAN
Management VLAN :
VLAN ID Name | Status Voice Jumbo
------- -------------------- + ---------- ----- -----
1 DEFAULT_VLAN | Port-based No Yes
2 DataLAN | Port-based No No
ProCurve 2910al-24G Switch#
if I use vmkping -s 8972 xxx.xxx.xxx.xxx from an ssh session to the host I get a timed out error
if I just use vmkping (without the -s switch) I get all three packets back
if I ping using the data-size switch from the 2910 I get a timed out error
if I do a straight ping I get the packet back
Any ideas, the switch is directly connected to this esx host.
many thanks
Update:
I can ping between other SAN devices from the switches using ping data-size 8792 xxx.xxx.xxx.xxx
I can ping between nics if I don't use jumbo frames i.e. vmkping xxx.xxx.xxx.xxx is OK, but if I use a jumbo frame it times out i.e.
vmkping -s 8792 xxx.xxx.xxx.xxx times out.
This would suggest a problem with the nic or the vswitch setup, the nics are two HP NC360T's, have I missd something on the nics when I installed them? Is there something in the BIOS ?
all ideas, tips and suggestions welcome 'cause I am stuck now.
Ian