Re: [xcat-user] Setting MTU

[Christopher J. W. <C.J...@qm...>]

I've (hopefully) submitted: https://github.com/xcat2/xcat-core/issues/2535

Thanks for your help - and for the helpful other responses on the thread.

Chris

On 21/02/17 20:15, Victor Hu wrote:
> Chris, can you open a issue in GitHub regarding this and we can trace it
> there.  If you prefer, let me know and I'll open it.
>
> Thanks,
> Victor
>
>   	
>
>
>
>
>     ----- Original message -----
>     From: "Christopher J. Walker" <C.J...@qm...>
>     To: xCAT Users Mailing list <xca...@li...>
>     Cc:
>     Subject: Re: [xcat-user] Setting MTU
>     Date: Tue, Feb 21, 2017 9:30 AM
>
>     We are on 2.12.4.
>
>     I think my problem is that it performs as documented and works for DHCP.
>     "confignics -s" however doesn't then grab the MTU.
>
>     Chris
>
>     On 21/02/17 13:36, Victor Hu wrote:
>     > Hi Chris,
>     >
>     > We had a contribution from the community that added support for this
>     > late last year to add support for MTU on the networks table.
>     > https://github.com/xcat2/xcat-core/pull/1933 Looks like it was
>     > integrated in the 2.12.4 release or newer.
>     >
>     > I'm not sure which version of xCAT you are currently on, but you can
>     > take a look at that pull request and see if it satisfies your
>     requirements.
>     >
>     > Thanks,
>     > Victor
>     >
>     >
>     >
>     >     ----- Original message -----
>     >     From: "Christopher J. Walker" <C.J...@qm...>
>     >     To: "xca...@li..."
>     <xca...@li...>
>     >     Cc:
>     >     Subject: [xcat-user] Setting MTU
>     >     Date: Tue, Feb 21, 2017 6:30 AM
>     >
>     >     I'm trying to configure the MTU to be 9000 for Centos 7 hosts
>     on our
>     >     internal network. I'm using xCAT 2.12.4
>     >
>     >
>     >     A way that works is to set the MTU explicitly on a network
>     card basis -
>     >     so I do:
>     >
>     >          nicextraparams.ens1f0=MTU=9000
>     >     and add
>     >        "confignics -s"
>     >     to the postscripts for the node.
>     >
>     >     However we have a number of different hardware types - and the
>     internal
>     >     network card name therefore changes.
>     >
>     >     It seems cleaner to set the MTU in the MTU column of the
>     networks table,
>     >     instead of explicitly listing each network card type. For
>     testing, I've
>     >     removed the "nicextraparams.ens1f0=MTU=9000" and set the MTU
>     of 9000 in
>     >     the networks table. DHCP now correctly sets the MTU to be
>     9000, but this
>     >     is then removed by "confignics -s" - resulting in the default
>     of 1500
>     >     after install.
>     >
>     >     Is this an oversight on my part, or a bug in confignics, or
>     configeth
>     >
>     >     Chris
>     >     --
>     >     Dr Christopher J. Walker
>     >     ITS Research
>     >     Queen Mary University of London, E1 4NS
>     >
>     >
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>     Dr Christopher J. Walker
>     ITS Research
>     Queen Mary University of London, E1 4NS
>     +44 20 7882 5969
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-- 
Dr Christopher J. Walker
ITS Research
Queen Mary University of London, E1 4NS
+44 20 7882 5969