[XEN] domu unreachable to and from external

duyuyang · 10-31-2008, 07:34 AM

A domU is installed in Xen, it can ping dom0, but not outside Xen.

In domU:

ping 10.0.0.150
From 10.0.0.36 icmp_seq=303 Destination Host Unreachable
From 10.0.0.36 icmp_seq=304 Destination Host Unreachable
From 10.0.0.36 icmp_seq=305 Destination Host Unreachable
From 10.0.0.36 icmp_seq=306 Destination Host Unreachable
From 10.0.0.36 icmp_seq=307 Destination Host Unreachable
From 10.0.0.36 icmp_seq=308 Destination Host Unreachable

In dom0:

tcpdump -i peth0 | grep "10.0.0.36" /*10.0.0.36 is domu's IP*/
16:21:10.181977 arp who-has 10.0.0.150 tell 10.0.0.36
16:21:11.181961 arp who-has 10.0.0.150 tell 10.0.0.36
16:21:11.841972 arp who-has 10.0.0.150 tell 10.0.0.36
16:21:12.181974 arp who-has 10.0.0.150 tell 10.0.0.36
16:21:12.841953 arp who-has 10.0.0.150 tell 10.0.0.36
16:21:13.841997 arp who-has 10.0.0.150 tell 10.0.0.36
16:21:14.848934 arp who-has 10.0.0.150 tell 10.0.0.36
16:21:15.181945 arp who-has 10.0.0.150 tell 10.0.0.36
16:21:15.845963 arp who-has 10.0.0.150 tell 10.0.0.36
16:21:16.181962 arp who-has 10.0.0.150 tell 10.0.0.36

I don't know what is wrong. Can anyone help?

Thanks,

Shawn

duyuyang · 11-01-2008, 03:00 AM

Problem solved. Turns out that the promiscuous mode of peth0 is turned off. Peculiar!

thanks

tractng · 11-01-2008, 03:12 PM

Shawn,

Did you try this?

ifconfig eth0 promisc

tnt

duyuyang · 11-02-2008, 06:44 PM

Actually I tried: ifconfig peth0 promisc. It did solve the problem, henceforth I ifconfig peth0 -promisc, the dumU could stll reach outside. Peculiar Again!