Edgar Ricardo Gonzalez Lazaro
2011-Apr-12 23:08 UTC
[Xen-users] vlan bridge on gentoo hangs ssh
I have a Xen Dom0 over gentoo linux, I have configured two vlans over an ethernet nic with 1496 MTU, three bridges have been configured over each, the eth0, vlan1 and vlan2, everything seems to be working the DomUs on each bridge can reach between them and Dom0 reach all the DomUs but, when I login into one of those DomUs with ubuntu server 10.10 and execute the ifconfig command the session hangs... nothing but close the terminal is posible. At first I guess apparmor could be causing some problem so I uninstalled it but nothig, another DomU with SLES11 seems to be having the same behaviour. /var/log/messages doesn''t gives usefull information nor dmesg. When I connect to DomU via VNC through Dom0 vnc server nothing wrong happends. Some Ideas? Edgar Ricardo G. Lázaro _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Tue, Apr 12, 2011 at 11:08 PM, Edgar Ricardo Gonzalez Lazaro <ministromayor@gmail.com> wrote:> I have a Xen Dom0 over gentoo linux, I have configured two vlans over an ethernet nic with > 1496 MTU, three bridges have been configured over each, the eth0, vlan1 and vlan2, everything seems to be working the DomUs on each bridge can reach between them and Dom0 reach all the DomUs but, when I login into one of those DomUs with ubuntu server 10.10 and execute the ifconfig command the session hangs... nothing but close the terminal is posible. At first I guess apparmor could be causing some problem so I uninstalled it but nothig, another DomU with SLES11 seems to be having the same behaviour. /var/log/messages doesn''t gives usefull information nor dmesg. > > When I connect to DomU via VNC through Dom0 vnc server nothing wrong happends. > > > Some Ideas? >What version of Xen/dom0 kernel are you using on this Gentoo installation? Have you tried disabling checksumming: http://xen.markmail.org/search/?q=%22ethtool+-K%22#query:%22ethtool%20-K%22+page:1+mid:ozu24u7azscw2zwf+state:results You could also take a look at the xend logs and see if the system is also hung when doing xm console during the ssh hang. Thanks, Todd -- Todd Deshane http://www.linkedin.com/in/deshantm http://www.xen.org/products/cloudxen.html _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Great! Maybe this solution will help someone else, so adding back xen-users to the CC. Thanks, Todd On Wed, Apr 13, 2011 at 1:25 PM, Edgar Ricardo Gonzalez Lazaro <ministromayor@gmail.com> wrote:> I solved this yesterday, the Dom0 eth0 with mtu 1496 have the bridge with mtu 1500 so the DomU have a nic wirh mtu 1500 something happends between bridge and nic, but I reduced the domU mtu to 1496 and the problem has gone. > > I don''t know why but it seems the xen bridge does not handle fragmentation may be a misconfiguration of mine at this level. > > Thanks a lot. > > Edgar Ricardo G. Lázaro > > El 13/04/2011, a las 00:39, Todd Deshane <todd.deshane@xen.org> escribió: > >> On Tue, Apr 12, 2011 at 11:08 PM, Edgar Ricardo Gonzalez Lazaro >> <ministromayor@gmail.com> wrote: >>> I have a Xen Dom0 over gentoo linux, I have configured two vlans over an ethernet nic with >>> 1496 MTU, three bridges have been configured over each, the eth0, vlan1 and vlan2, everything seems to be working the DomUs on each bridge can reach between them and Dom0 reach all the DomUs but, when I login into one of those DomUs with ubuntu server 10.10 and execute the ifconfig command the session hangs... nothing but close the terminal is posible. At first I guess apparmor could be causing some problem so I uninstalled it but nothig, another DomU with SLES11 seems to be having the same behaviour. /var/log/messages doesn''t gives usefull information nor dmesg. >>> >>> When I connect to DomU via VNC through Dom0 vnc server nothing wrong happends. >>> >>> >>> Some Ideas? >>> >> >> What version of Xen/dom0 kernel are you using on this Gentoo installation? >> >> Have you tried disabling checksumming: >> http://xen.markmail.org/search/?q=%22ethtool+-K%22#query:%22ethtool%20-K%22+page:1+mid:ozu24u7azscw2zwf+state:results >> >> You could also take a look at the xend logs and see if the system is >> also hung when doing xm console during the ssh hang. >> >> Thanks, >> Todd >> >> -- >> Todd Deshane >> http://www.linkedin.com/in/deshantm >> http://www.xen.org/products/cloudxen.html >-- Todd Deshane http://www.linkedin.com/in/deshantm http://www.xen.org/products/cloudxen.html _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users