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Nicodemus555
Contributor
Contributor

How to verify SAN MULTIPATHING on ESX Host?

Question: how can SAN multipathing be verified when looking at the Storage tab in vCenter..?

Was wondering if you might help confirm how SAN multipathing is checked on the ESX Hosts..? We received a request to check multipathing on two Hosts ... and I am not clear on what verifies MULTIPATHING when looking at the Runtime names ( see screen caps below) ?

First screen cap has only a single tunnel showing (0) ... while other screen cap has two tunnels ( 0 & 1 ) which I am taking to indicate multipathing... is this a correct understanding..?

Little help.. please, - Nicodemus

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AWo
Immortal
Immortal

If you have multipathing enabled form end to end (two HBA ports, two switches and two front end ports in the storage with the appropriate zoning) you should see 4 paths to each LUN/target.

Right click on a device and choose "Path management". You should see 4 active paths, one of them should be the preferred one.

vmhba1:C0:T0:Lx

vmhba1:C0:T1:Lx

vmhba2:C0:T0:Lx

vmhba2:C0:T1:lX

If you look at the HBA and choose "Path" like you screenshot shows, you should see two entrioes for each LUN/target per HBA.

What you can't see is if you're going over two switches.


AWo

VCP 3 & 4

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binoche
VMware Employee
VMware Employee

single tunnel.jpg shows T1 not connected, please check its FC networking, I guess T1 forgets to lun masking?

binoche, VMware VCP, Cisco CCNA

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Nicodemus555
Contributor
Contributor

AWo,

Please see newly attached screen caps... if I am clear now the first has Multi-pathing functional (two targets shown)... and the second cap does not (single target shown) ...?

Appreciate it, - Nicodemus

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