Are your netmask config Ok? Can you use wireshark to sniff traffic in the middle LANCOM <->Wireshark/tcpdump<->Xenserver and send me a trace?
Best Regards,
Juan Carlos Díaz Fernández
IGN Solutions™
Director Técnico
mailto: juan.carlos.diaz@xxxxxxxxxxxxxxxxx
callto: +34638295207/+34617413903
Innova Galicia Networks Solutions SL
http://www.ign-solutions.com
Pazo de Feiras e Congresos de Lugo - Palomar s/n
27004 LUGO - Spain
callto: +34982284150 faxto: +34982284922
2010/3/5 Michael Schumacher <michael.schumacher@xxxxxxxx>
Nobody having an idea?
> Hi,
> I am trying to fix a problem I have for about a week now.
> The environment is:
> --several independent servers with Centos5.4 on the latest patchlevel
> (example will be server2) All of them are working properly.
> --a machine with Xen installed to host some virtual machines
> (xenserver1)
> --domu servers on xenserver1 (crmserver1, winserver1)
> The whole network is connected with a Lancom router to a DSL line.
> Some days ago I noticed that server2 was updated properly, but
> xenserver1, crmserver1 and winserver were not updating the OS
> properly. They seemed to be cut off the internet. I can ping from all
> to all servers internally, I can ssh from all to all servers
> internally and I can browse the Internet from server2 successfully
> (using IP-numbers and hostnames), but xenserver1 and its domu clients
> could not connect to the internet. I checked the firewalls on
> xenserver, and crmserver1. They seemed to be OK and stopping them with
> "etc/init.d/iptables stop" didn't solve the problem.
> I can resolve hostnames:
>>[root@xenserver1 ~]# nslookup www.centos.org
>>Server: 192.168.1.1
>>Address: 192.168.1.1#53
>>
>>Non-authoritative answer:
>>Name: www.centos.org
>>Address: 72.232.194.162
> but I cannot browse neither to "elinks http://www.centos.org" nor to
> 72.232.194.162, however, I can ping www.centos.org successfully.
> the network routes seem to be OK :
>>[root@xenserver1 ~]# route
>>Kernel IP routing table
>>Destination Gateway Genmask Flags Metric Ref Use Iface
>>10.1.1.0 * 255.255.255.0 U 0 0 0 eth1
>>192.168.122.0 * 255.255.255.0 U 0 0 0 virbr0
>>169.254.0.0 * 255.255.0.0 U 0 0 0 eth0
>>192.168.0.0 * 255.255.0.0 U 0 0 0 eth0
>>default LANCOM_1751_1.p 0.0.0.0 UG 0 0 0 eth0
> (eth1 is a drbd interface)
>> [root@crmserver1 ~]# route
>> Kernel IP routing table
>> Destination Gateway Genmask Flags Metric Ref Use Iface
>> 169.254.0.0 * 255.255.0.0 U 0 0 0 eth0
>> 192.168.0.0 * 255.255.0.0 U 0 0 0 eth0
>> default LANCOM_1751_1.p 0.0.0.0 UG 0 0 0 eth0
> Has anybody any clue where to look?
best regards
---
Michael Schumacher
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
http://lists.centos.org/mailman/listinfo/centos
_______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos
