We have a Vmware 6.0 cluster and using Netapp FAS2240-4 (8.23) for storage.
We've been experiencing disconnects on vm's hard drives.
on the netapp error log I can see this:
ISCSI: New session from initiator iqn.1990-07.com.emulex:dev-svr-03 at IP addr 10.0.0.3
ISCSI: New session from initiator iqn.1990-07.com.emulex:dev-svr-03 at IP addr 10.0.0.19
ISCSI: New session request from initiator iqn.1990-07.com.emulex:dev-svr-03, a session from this initiator already exists.
each esxi host is using hardware iscsi has vmhba1 and vmhba2 configured with an ip address each as above. I'm just wondering why it's trying to connect with both and therefore giving us this error?
Hi parisvc
Could you confirm if you are using independent or dependant ISCSI adapters? In both cases I would have expected the iSCSI Name to have been unique between vmhba1 and vmhba2?
From what is posted it appears that both have the same iSCSI Name?
Thanks in advance
We are using HP ProLiant BL460c with HP FlexFabric 10Gb 2-port 554FLB adapter
[root@dev-svr-03:~] esxcfg-scsidevs -a
vmhba0 hpsa link-n/a sas.50014380268127f0 (0000:03:00.0) Hewlett Packard Enterprise Smart Array P220i
vmhba1 be2iscsi online iqn.1990-07.com.emulex:dev-svr-03 (0000:04:00.2) Emulex Corporation Emulex OneConnect OCe11100 10GbE, iSCSI UCNA
vmhba2 be2iscsi online iqn.1990-07.com.emulex:dev-svr-03 (0000:04:00.3) Emulex Corporation Emulex OneConnect OCe11100 10GbE, iSCSI UCNA
From reading the below 1 adapter with 2 ports means they use the same iqn....
Two ISCSI HBAs emulex oneconnect with identical IQN and can't multipath
Yes - I was thinking about this last night and the software ISCSI device only has one IQN but multiple IP addresses.
Thinking some more about this
Hi there,
After a little searching it appears that there might be two things you should check:
I would investigate option 1 first before contemplating the other and obviously check your NetApp upgrade matrix to see if this is a possibility.
Kind regards.
Many thanks for your research.
1. Actually no I posted this post also: esxi and netapp MTU
Do you know if there's anything I can use to test the mtu settings with as I can't vmkping on an iscsi adapter?
2. The latest version of ontap we can use for our Netapps is 8.2.5 so we are going to upgrade from 8.2.3 but it looks like we won't be able to get the version that you have linked.
Hi there,
Sorry for the slow response but have been focused elsewhere.
You can actually use vmkping on the iSCSI interface by using the -I option to specify the vmk to use. Here is an article that explains it better than I can: https://kb.vmware.com/s/article/1003728
One thing to note - make sure you use the -d option so that packets cannot be fragmented to fully test.
Let us know how this works out.
we are using hardware iscsi so I can't vmkping from the iscsi adapter?
[root@dev-svr-03:~] esxcfg-hwiscsi -l vmhba1
DHCP Configuration Disabled
ARP Redirection Disabled
MTU Size = 8342
[root@dev-svr-03:~] vmkping -I vmhba1 -d -s 8342 10.0.5.134
Unknown interface 'vmhba1': Invalid argument
You don't need to put vmhba1 when doing vmkping. Do it again with vmhba1