Xen users - Mar 2008 - Network Problems in Dom0

Hello, 
maybe someone can help us. We are running a Mail-Server in a xenU-Domain since 3
month without any problems.
But now we have trouble with dom0. In dom0 the ssh-Daemon is running but we only
can only login sometimes via putty (Network error: Connection timeout).
We need 5-8 times till we can login with putty. After login the server is very
very slow. Processes respond with delay.
Does someone have an idea?

Thanks,
jansen 


Here some infos about the server: 

Last login: Wed Mar 26 09:59:22 2008 from 195.37.18.230
xenmail-dom0:~ # xm list
Name                                      ID   Mem VCPUs      State   Time(s)
Domain-0                                   0   512     1     r-----   5712.8
mailserver                                   1  2048     2     -b----   3521.1
xenmail-dom0:~ #


xentop - 10:07:06   Xen 3.0.4_13138-0.47
2 domains: 1 running, 1 blocked, 0 paused, 0 crashed, 0 dying, 0 shutdown
Mem: 16776184k total, 2862056k used, 13914128k free    CPUs: 4 @ 2000MHz
      NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k) MAXMEM(%) VCPUS
 NETS NETTX(k) NETRX(k) VBDS   VBD_OO   VBD_RD   VBD_WR SSID
  Domain-0 -----r       5713    0.3     524456    3.1   no limit       n/a     4
    4     4061    12769    0        0        0        0    0
    mailserver --b---       3525    0.1    2096708   12.5    2097152      12.5  
2
    2    56264   223022    3        0    17947  1094274    0


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On Do, Mär 27, 2008 at 09:13:17 +0000, Ralf Jansen
wrote:
> Hello, 
> maybe someone can help us. We are running a Mail-Server in a xenU-Domain
since 3 month without any problems.
> But now we have trouble with dom0. In dom0 the ssh-Daemon is running but we
only can only login sometimes via putty (Network error: Connection timeout).
> We need 5-8 times till we can login with putty. After login the server is
very very slow. Processes respond with delay.
> Does someone have an idea?

Very simple idea: DNS reverse lookup problem?


If it is not DNS, please check:

When you ping dom0,
what is the percent of packet loss?

Also, what is the percent of packet loss
when you do ping flood (ping -f)?

And the same questions, about situation 
when you make ping out of dom0.


> 
> Thanks,
> jansen 
> 
> 
> Here some infos about the server: 
> 
> Last login: Wed Mar 26 09:59:22 2008 from 195.37.18.230
> xenmail-dom0:~ # xm list
> Name                                      ID   Mem VCPUs      State  
Time(s)
> Domain-0                                   0   512     1     r-----  
5712.8
> mailserver                                   1  2048     2     -b----  
3521.1
> xenmail-dom0:~ #
> 
> 
> xentop - 10:07:06   Xen 3.0.4_13138-0.47
> 2 domains: 1 running, 1 blocked, 0 paused, 0 crashed, 0 dying, 0 shutdown
> Mem: 16776184k total, 2862056k used, 13914128k free    CPUs: 4 @ 2000MHz
>       NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k) MAXMEM(%)
VCPUS
>  NETS NETTX(k) NETRX(k) VBDS   VBD_OO   VBD_RD   VBD_WR SSID
>   Domain-0 -----r       5713    0.3     524456    3.1   no limit       n/a 
4
>     4     4061    12769    0        0        0        0    0
>     mailserver --b---       3525    0.1    2096708   12.5    2097152     
12.5     2
>     2    56264   223022    3        0    17947  1094274    0
> 
> 
>       Lesen Sie Ihre E-Mails jetzt einfach von unterwegs.
> www.yahoo.de/go
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
-- 
WBR, i.m.chubin


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