Hi, I am using XCP version 1.5beta (1.4.90) with for the host the kernel version 2.6.32.12-0.7.1.xs1.4.90.530.170661xen en for the guests reh6.1 as operating system. When we increase the MTU of the ethX, vifX and xenbrX to 9000 and also for other machines in our test envioranment and we give the command; ping -s 9000 <ip of extern machine> from the guest to an other machine wich is not on the same host we do not get any response. When we give the same command to an other guest on the same host the ping command succeeds. When we ping from the host to other machines outside the host the ping command is also succeeds. Has somebody ideas what I am doing wrong? _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users
Hi, if you''re sure, the interfaces are all set to 9k, i''ld expect your switch in between your hosts is not capable of / not cofigured for 9k frames. I''d only done 9k on dom0 so far, but for having it available to domU I assume it needs to be set in a persistant way. If you change your vifX.X interfaces that would be gone if you shutdown/create your machine, wouldn''t it? Am Freitag, den 20.07.2012, 10:44 +0200 schrieb Mesut Donmez:> Hi, > > I am using XCP version 1.5beta (1.4.90) with for the host the kernel > version 2.6.32.12-0.7.1.xs1.4.90.530.170661xen en for the guests > reh6.1 as operating system. > When we increase the MTU of the ethX, vifX and xenbrX to 9000 and > also for other machines in our test envioranment and we give the > command; ping -s 9000 <ip of extern machine> from the guest to an > other machine > wich is not on the same host we do not get any response. > When we give the same command to an other guest on the same host the > ping command succeeds. > When we ping from the host to other machines outside the host the ping > command is also succeeds. > > Has somebody ideas what I am doing wrong? > > > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xen.org > http://lists.xen.org/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users
Hi,> > if you''re sure, the interfaces are all set to 9k, i''ld expect your > switch in between your > hosts is not capable of / not cofigured for 9k frames. > > I''d only done 9k on dom0 so far, but for having it available to domU > I assume it needs to > be set in a persistant way. If you change your vifX.X interfaces that > would be gone > if you shutdown/create your machine, wouldn''t it? > > > Am Freitag, den 20.07.2012, 10:44 +0200 schrieb Mesut Donmez: >> Hi, >> I am using XCP version 1.5beta (1.4.90) with for the host the kernel >> version 2.6.32.12-0.7.1.xs1.4.90.530.170661xen en for the guests >> reh6.1 as operating system. >> When we increase the MTU of the ethX, vifX and xenbrX to 9000 and >> also for other machines in our test envioranment and we give the >> command; ping -s 9000 <ip of extern machine> from the guest to an >> other machine >> wich is not on the same host we do not get any response. >> When we give the same command to an other guest on the same host the >> ping command succeeds. >> When we ping from the host to other machines outside the host the >> ping command is also succeeds. >> Has somebody ideas what I am doing wrong? >> _______________________________________________ >> Xen-users mailing list >> Xen-users@lists.xen.org <mailto:Xen-users@lists.xen.org> >> http://lists.xen.org/xen-users > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xen.org > http://lists.xen.org/xen-usersI''ve had similar issues until I''ve found out that my card supported only 8400 frames at maximum. So it could be a hardware problem as well Regards Geza _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users
Hi,
Thanks for your quick reaction.
Yes I am sure for all the interfaces (intern as extern) the MTU is set to
9000 ans also the database for the vif/pif/network(bridges) shows me MTU
9000.
The strange thing is when I set everything to 9000 and start the guest the
bridgeX shows me MTU=1500 ("ifconfig -a" command used ) even the
vif/pif/network database (xe vif-param-list, xe pif-param-list, xe
network-param-list commands used) are showing me MTU 9000.
And my NIC are able to send 9000 frames. Because what I mentioned before
when I ping from the host to an extern interface I do not have problems.
SO ra ra ra what do I wrong or is there still some other configure files in
the host ot guest operating system which I did forgot???
2012/7/20 Stephan Seitz <s.seitz@netzhaut.de>
> **
> Hi,
>
> if you''re sure, the interfaces are all set to 9k, i''ld
expect your switch
> in between your
> hosts is not capable of / not cofigured for 9k frames.
>
> I''d only done 9k on dom0 so far, but for having it available to
domU I
> assume it needs to
> be set in a persistant way. If you change your vifX.X interfaces that
> would be gone
> if you shutdown/create your machine, wouldn''t it?
>
>
> Am Freitag, den 20.07.2012, 10:44 +0200 schrieb Mesut Donmez:
>
> Hi,
>
>
>
> I am using XCP version 1.5beta (1.4.90) with for the host the kernel
> version 2.6.32.12-0.7.1.xs1.4.90.530.170661xen en for the guests reh6.1 as
> operating system.
>
> When we increase the MTU of the ethX, vifX and xenbrX to 9000 and also
> for other machines in our test envioranment and we give the command; ping
> -s 9000 <ip of extern machine> from the guest to an other machine
>
> wich is not on the same host we do not get any response.
>
> When we give the same command to an other guest on the same host the ping
> command succeeds.
>
> When we ping from the host to other machines outside the host the ping
> command is also succeeds.
>
>
>
> Has somebody ideas what I am doing wrong?
>
>
>
>
>
>
>
> _______________________________________________
> Xen-users mailing listXen-users@lists.xen.orghttp://lists.xen.org/xen-users
>
>
_______________________________________________
Xen-users mailing list
Xen-users@lists.xen.org
http://lists.xen.org/xen-users
Hi, ok, I missed that part, that you''re able to use jumboframes between dom0. I''m sorry, but I don''t know how bridges are created by XCP / XenServer. On recent Xen 4, the usual /etc/xen/scripts/network-bridge is somewhat depricated. (Or simply doesn''t work any longer ;-) without problems). Most installations I''ve seen so far creating the bridges with onboard tools in /etc/sysconfig/network-scripts/... or /etc/network/interfaces. During runtime only the vif''s are created and removed, but not the bridges itself. If(!) XCP does it the same way, you could try to find the script and/or configuration file where the bridge itself is been created. As a short test, if it''s worth the search, try ifconfig bridgename mtu 9000 and see if (and how long) this helps. Maybe the XenServer forums are more helpful? cheers, Stephan Am Montag, den 23.07.2012, 11:10 +0200 schrieb Mesut Donmez:> Hi, > > Thanks for your quick reaction. > > Yes I am sure for all the interfaces (intern as extern) the MTU is set > to 9000 ans also the database for the vif/pif/network(bridges) shows > me MTU 9000. > The strange thing is when I set everything to 9000 and start the guest > the bridgeX shows me MTU=1500 ("ifconfig -a" command used ) even the > vif/pif/network database (xe vif-param-list, xe pif-param-list, xe > network-param-list commands used) are showing me MTU 9000. > And my NIC are able to send 9000 frames. Because what I mentioned > before when I ping from the host to an extern interface I do not have > problems. > > SO ra ra ra what do I wrong or is there still some other configure > files in the host ot guest operating system which I did forgot??? > > > 2012/7/20 Stephan Seitz <s.seitz@netzhaut.de> > > Hi, > > if you''re sure, the interfaces are all set to 9k, i''ld expect > your switch in between your > hosts is not capable of / not cofigured for 9k frames. > > I''d only done 9k on dom0 so far, but for having it available > to domU I assume it needs to > be set in a persistant way. If you change your vifX.X > interfaces that would be gone > if you shutdown/create your machine, wouldn''t it? > > > Am Freitag, den 20.07.2012, 10:44 +0200 schrieb Mesut Donmez: > > > Hi, > > > > I am using XCP version 1.5beta (1.4.90) with for the host > > the kernel version 2.6.32.12-0.7.1.xs1.4.90.530.170661xen en > > for the guests reh6.1 as operating system. > > When we increase the MTU of the ethX, vifX and xenbrX to > > 9000 and also for other machines in our test envioranment > > and we give the command; ping -s 9000 <ip of extern > > machine> from the guest to an other machine > > wich is not on the same host we do not get any response. > > When we give the same command to an other guest on the same > > host the ping command succeeds. > > When we ping from the host to other machines outside the > > host the ping command is also succeeds. > > > > Has somebody ideas what I am doing wrong? > > > > > > > > > > _______________________________________________ > > Xen-users mailing list > > Xen-users@lists.xen.org > > http://lists.xen.org/xen-users > >_______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users