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I am very new to multipathing concept. I am trying to troubleshoot an issue with multipathing however, I am not sure if it's an issue with multipath configuration.

Server is connected to storage over iscsi, there are 4 different Ethernet ports which are connected to server for storage connection. Eth1 and Eth2 : 192.x.x.x (2 IP's in same subnet) Eth5 and Eth6 : 10.x.x.x (2 IP's in same subnet) these ip's are not in any vlan.

None of the Ethernet card IP config have gateway. I think it's working on broadcast.

Here is the configuration on server for multipath.

device
{
vendor "NETAPP"
product "LUN"
path_grouping_policy group_by_prio
features "0"
prio "ontap"
path_selector "round-robin 0"
failback immediate
hardware_handler "0"
rr_weight uniform
rr_min_io 128
}

Post running this command "iscsiadm --mode session" I am only able to see 2 paths i.e Eth5 and Eth6. why I am unable to see path for Eth0 and Eth1 Should be able to see 4 paths or 2 paths are correct. I have checked messages, unable to find anything.

Kindly advise, If above configuration is correct or If wrong, what things need to correct.

Thank you.

Rahul
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  • What is the ouptut of "multipath -ll"? – batistuta09 Aug 02 '19 at 07:40
  • @batistuta09 I am able to see all LUNS, below is the o/p for one of them 3600a0980383034715a3f4662364b4a68 dm-7 NETAPP,LUN C-Mode size=10G features='0' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=4 status=active | `- 1:0:0:11 sdd 8:48 active ready running `-+- policy='round-robin 0' prio=1 status=enabled `- 2:0:0:11 sde 8:64 active ready running – Rahul Aug 02 '19 at 10:45
  • Please could you add the addresses and subnet masks of **all** the NICs on the initiator and the target? – Daniel K Aug 04 '19 at 17:52

0 Answers0