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Reitz, Christian

2009-Jun-19 16:19 UTC

[Xen-users] Xen 3.0.3 on Debian Etch, Bridging, intermittent packet loss

Hello all,

 

we recently experience intermittent packet losses on child system.

 

In this situation the the root server is still reachable, access to the
child is possible via console, and also you can ping from root to child
system. But you cannot ping from external to the child and from
(console) child to external.

 

This happens every now and then and the duration differs from few
seconds to sometimes more than half a minute.

 

I cannot find a solution in the internet or any help resource out there,
... maybe my search patterns are dumb... I don''t know.

Also I cannot find anything in any system log... 

 

Maybe there is someone who had the same issues. 

 

I found something about bridge helo time, that apparently must not be
zero but "brctl showstp xenbr0" shows this:

 

xenbr0

 bridge id              8000.feffffffffff

 designated root        8000.feffffffffff

 root port                 0                    path cost
0

 max age                  20.00                 bridge max age
20.00

 hello time                2.00                 bridge hello time
2.00

 forward delay             0.00                 bridge forward delay
0.00

 ageing time             300.01

 hello timer               1.77                 tcn timer
0.00

 topology change timer     0.00                 gc timer
0.09

 flags

 

Therefore it shouldn''t be zero... 

 

My domain-config is set up like this:

 

disk    = [ ''file:/vserver/domains/xyz/disk.img,sda1,w'',
''file:/vserver/domains/xyz/swap.img,sda2,w'' ]

 

#

#  Hostname

#

name    = ''xyz''

 

 

#

#  Networking

#

vif  = [ ''ip=x.x.x.x'' ]

 

#

#  Behaviour

#

on_poweroff = ''destroy''

on_reboot   = ''restart''

on_crash    = ''restart''

 

 

ifconfig

eth0      Link encap:Ethernet  HWaddr 00:11:6B:93:6F:F4

          inet addr:x.x.x.x  Bcast:xx.xx.x.x  Mask:255.255.255.224

          inet6 addr: xxx::xxx:xxx:xxx:xxx/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:680162 errors:0 dropped:0 overruns:0 frame:0

          TX packets:687269 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:95845391 (91.4 MiB)  TX bytes:100974938 (96.2 MiB)

 

eth0:2    Link encap:Ethernet  HWaddr 00:11:6B:93:6F:F4

          inet addr:x.x.x.x  Bcast:x.x.x.x  Mask:255.255.255.248

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

 

lo        Link encap:Local Loopback

          inet addr:127.0.0.1  Mask:255.0.0.0

          inet6 addr: ::1/128 Scope:Host

          UP LOOPBACK RUNNING  MTU:16436  Metric:1

          RX packets:14729 errors:0 dropped:0 overruns:0 frame:0

          TX packets:14729 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:2272689 (2.1 MiB)  TX bytes:2272689 (2.1 MiB)

 

peth0     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF

          inet6 addr: xxx::xxx:xxx:xxx:xxx /64 Scope:Link

          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1

          RX packets:478347 errors:3 dropped:12 overruns:1 frame:0

          TX packets:505109 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:75612245 (72.1 MiB)  TX bytes:88192492 (84.1 MiB)

          Interrupt:18 Base address:0x4000

 

vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF

          inet6 addr: xxx::xxx:xxx:xxx:xxx /64 Scope:Link

          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1

          RX packets:687269 errors:0 dropped:0 overruns:0 frame:0

          TX packets:680162 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:100974938 (96.2 MiB)  TX bytes:95845391 (91.4 MiB)

 

vif4.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF

          inet6 addr: xxx::xxx:xxx:xxx:xxx /64 Scope:Link

          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1

          RX packets:209217 errors:0 dropped:0 overruns:0 frame:0

          TX packets:217172 errors:0 dropped:2 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:19954554 (19.0 MiB)  TX bytes:22273840 (21.2 MiB)

 

xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF

          inet6 addr: xxx::xxx:xxx:xxx:xxx /64 Scope:Link

          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1

          RX packets:6847 errors:0 dropped:0 overruns:0 frame:0

          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:220966 (215.7 KiB)  TX bytes:0 (0.0 b)

 

Any help would be appreciated!

 

Thanks in advance

Christian



_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Reitz, Christian

2009-Jun-21 09:17 UTC

head link

[Xen-users] RE: Xen 3.0.3 on Debian Etch, Bridging, intermittent packet loss

Hello all,

 

we recently experience intermittent packet losses on child system.

 

In this situation the the root server is still reachable, access to the
child is possible via console, and also you can ping from root to child
system. But you cannot ping from external to the child and from
(console) child to external.

 

This happens every now and then and the duration differs from few
seconds to sometimes more than half a minute.

 

I cannot find a solution in the internet or any help resource out there,
... maybe my search patterns are dumb... I don''t know.

Also I cannot find anything in any system log... 

 

Maybe there is someone who had the same issues. 

 

I found something about bridge helo time, that apparently must not be
zero but "brctl showstp xenbr0" shows this:

 

xenbr0

 bridge id              8000.feffffffffff

 designated root        8000.feffffffffff

 root port                 0                    path cost
0

 max age                  20.00                 bridge max age
20.00

 hello time                2.00                 bridge hello time
2.00

 forward delay             0.00                 bridge forward delay
0.00

 ageing time             300.01

 hello timer               1.77                 tcn timer
0.00

 topology change timer     0.00                 gc timer
0.09

 flags

 

Therefore it shouldn''t be zero... 

 

My domain-config is set up like this:

 

disk    = [ ''file:/vserver/domains/xyz/disk.img,sda1,w'',
''file:/vserver/domains/xyz/swap.img,sda2,w'' ]

 

#

#  Hostname

#

name    = ''xyz''

 

 

#

#  Networking

#

vif  = [ ''ip=x.x.x.x'' ]

 

#

#  Behaviour

#

on_poweroff = ''destroy''

on_reboot   = ''restart''

on_crash    = ''restart''

 

 

ifconfig

eth0      Link encap:Ethernet  HWaddr 00:11:6B:93:6F:F4

          inet addr:x.x.x.x  Bcast:xx.xx.x.x  Mask:255.255.255.224

          inet6 addr: xxx::xxx:xxx:xxx:xxx/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:680162 errors:0 dropped:0 overruns:0 frame:0

          TX packets:687269 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:95845391 (91.4 MiB)  TX bytes:100974938 (96.2 MiB)

 

eth0:2    Link encap:Ethernet  HWaddr 00:11:6B:93:6F:F4

          inet addr:x.x.x.x  Bcast:x.x.x.x  Mask:255.255.255.248

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

 

lo        Link encap:Local Loopback

          inet addr:127.0.0.1  Mask:255.0.0.0

          inet6 addr: ::1/128 Scope:Host

          UP LOOPBACK RUNNING  MTU:16436  Metric:1

          RX packets:14729 errors:0 dropped:0 overruns:0 frame:0

          TX packets:14729 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:2272689 (2.1 MiB)  TX bytes:2272689 (2.1 MiB)

 

peth0     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF

          inet6 addr: xxx::xxx:xxx:xxx:xxx /64 Scope:Link

          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1

          RX packets:478347 errors:3 dropped:12 overruns:1 frame:0

          TX packets:505109 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:75612245 (72.1 MiB)  TX bytes:88192492 (84.1 MiB)

          Interrupt:18 Base address:0x4000

 

vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF

          inet6 addr: xxx::xxx:xxx:xxx:xxx /64 Scope:Link

          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1

          RX packets:687269 errors:0 dropped:0 overruns:0 frame:0

          TX packets:680162 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:100974938 (96.2 MiB)  TX bytes:95845391 (91.4 MiB)

 

vif4.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF

          inet6 addr: xxx::xxx:xxx:xxx:xxx /64 Scope:Link

          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1

          RX packets:209217 errors:0 dropped:0 overruns:0 frame:0

          TX packets:217172 errors:0 dropped:2 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:19954554 (19.0 MiB)  TX bytes:22273840 (21.2 MiB)

 

xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF

          inet6 addr: xxx::xxx:xxx:xxx:xxx /64 Scope:Link

          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1

          RX packets:6847 errors:0 dropped:0 overruns:0 frame:0

          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:220966 (215.7 KiB)  TX bytes:0 (0.0 b)

 

Any help would be appreciated!

 

Thanks in advance

Christian



_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Xen users - Jun 2009 - Xen 3.0.3 on Debian Etch, Bridging, intermittent packet loss

[Xen-users] Xen 3.0.3 on Debian Etch, Bridging, intermittent packet loss

[Xen-users] RE: Xen 3.0.3 on Debian Etch, Bridging, intermittent packet loss