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Date:      Fri, 15 Jan 2021 12:30:52 +0100
From:      Ekkehard Gehm <freebsd@sudoers.net>
To:        freebsd-questions@freebsd.org
Subject:   iSCSI initiator to target with multiple IPs
Message-ID:  <0365d82d-88f2-6ce8-b730-edd7982ba083@sudoers.net>

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From: Ekkehard Gehm <freebsd@sudoers.net>
To: freebsd-questions@freebsd.org
Message-ID: <0365d82d-88f2-6ce8-b730-edd7982ba083@sudoers.net>
Subject: iSCSI initiator to target with multiple IPs

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Ahoy!

I hope someone can give me a hint on an issue I have with iSCSI.

I have a FreeBSD Server (the iSCSI initiator) which connects to a Dell
Equilogic RAID (the iSCSI target). So far no big deal. But... The Target
has one IP to connect to but in reality it has 8 interfaces with
different IPs for traffic shaping.

So. The initial connect to the pool-ip will result in a connection to
one of those 8 ips. Every now and then, the RAID (target) shifts the
interfaces. That will result in a message that the the target has moved
to another ip... And that is where shit happens - My FreeBSD initiator
drops the target completely (With a warning " target requests logout;
removing session")... Bad thing :-)

I don't know where to look. Is it multipath? MPIO?

Any hint is highly appreciated :-)

Cheers!

Ekki



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