Hello,
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@ign-solutions.com 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@pamas.de
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@centos.org http://lists.centos.org/mailman/listinfo/centos