Re: Network very very slow... was iSCSI and jumbo frames

[RVP <rvp%SDF.ORG@localhost>]

On Tue, 9 Feb 2021, BERTRAND Joël wrote:

> RVP a écrit :
> > This, and the other tests show that NetBSD iscsi initiator is OK.
>
> 	Note sure, after I have poster my last message, I remember qNAP uses
> iscsid as initiator and target iscsi daemon. I haven't done a test
> between NetBSD initiator and iscsid linux target.

Good point. So far we have only tested using istgt as the iscsi
target. Try testing the NetBSD initiator against the target from
the Open-iSCSI packages, which I think is standard for Linux and
is what I think is used on the NAS also.

Your is more likely to be a subtle incompatibility with this
iscsi target than an exotic explanation like throttling.

> > tcpdump -i wm0 -s 128 -w 1.dump
>
> 	You can downloaded https://hilbert.systella.fr/public/1.dump.xz

OK, but, be aware that this tcpdump will contain a lot of info.
about your network.

> 	Problem. iscsid is launched with :
> /sbin/iscsid --config=/etc/config/iscsi/sbin/iscsid.conf
> --initiatorname=/etc/iscsi/initiatorname.iscsi
>
> /etc/config is a symlink on /mnt/HDA_ROOT/.config/
>
> /etc/config/iscsi/sbin/iscsid.conf  doesn't exist, but I can find
> iscsi_trgt.conf in /etc/config :
> ...
> 	This file seems to contain active iscsi target copnfiguration. I have
> checked in /etc and I have found /etc/init.iscsitrgt.sh that shows that

The contents match your config., but I don't know which iscsi target
uses that format. The Open-ISCSI target (iscsid) format looks like
this:

https://github.com/open-iscsi/open-iscsi/blob/master/etc/iscsid.conf


> iSCSI target daemon is /sbin/isns_cd
>
> 	/sbin/isns_cd is a sumlink on /usr/local/sbin/isns_cd, but I don't see
> any isns_cd in ps output.

isns_cd is probably the iSNS server, not the iSCSI target server:

https://github.com/open-iscsi/open-isns

-RVP