Hi all, Recently I''ve faced a trouble about some networking problem in a Xen server. dom0 debian lenny kernel 2.6.26-1-xen-686 #1 SMP xen_caps : xen-3.0-x86_32p 4 domU all the same debian lenny kernel 2.6.26-1-xen-686 #1 SMP with 256M memory dom0 has access to 4 CPUs: xm vcpu-list Name ID VCPU CPU State Time(s) CPU Affinity Domain-0 0 0 1 r-- 47960.4 any cpu Domain-0 0 1 0 -b- 1531.2 any cpu Domain-0 0 2 1 -b- 1335.4 any cpu Domain-0 0 3 2 -b- 2513.8 any cpu firstdomU 6 0 3 -b- 39686.3 any cpu seconddomU 8 0 3 -b- 20195.7 any cpu thriddomU 7 0 3 -b- 19494.5 any cpu fourthdomU 9 0 3 -b- 20209.4 any cpu The issue is that 3 out of the 4 domU, randomly appear Network is unreachable problems as if there were no routes to the destinations although there is. The dom0 is acting as a router for all the domains with next option: (network-script network-multiple-bridge) dom0 has 2 interfaces, one internal and an external pings to the destination from domUs works after the Network is unreachable message appear. ip_conntrack table is not full at dom0: # cat /proc/net/ip_conntrack | wc -l 1744 # cat /proc/sys/net/ipv4/netfilter/ip_conntrack_max 65536 netperf checks looked ok, showing around 2G throughpout between domUs and between dom0 routes are ok in all the 4 nodes, pointing at dom0 "internal" address. The most annoying thing is that one domU does not show the problem and the other 3 do....anyone can point any method to check where the problem may reside? I can provide more info because I''ve tried to make the e-mail not very long and I think I didn''t succeed :( Any hint will be higly appreciated, Samuel. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users