[Fedora-xen] Routing doesn't work when I boot with the Xen kernel

[Dustin Henning]

       When the xend service starts, it creates bridges and virtual
interfaces attached to those bridges.  I am not so familiar with it to tell
you how to correct your problem on a permanent basis, but I can tell you
that perhaps the network script isn’t preserving your routes.  Check your
routes and see if a default route to the Linksys still exists.  It also
seems to me like F8 may use a different default xen network script, so
depending on what you want to do, you many need to change the network script
in xen’s config file.  This advice may be legacy, as I know Fedora’s
implementation gets more and more custom with each release, and I generally
fall back on old xen configuration techniques in spite of that, so this may
not be the route you want to take.
       Dustin

From: fedora-xen-bounces at redhat.com [mailto:fedora-xen-bounces at redhat.com]
On Behalf Of Jack Smith
Sent: Monday, January 07, 2008 22:40
To: fedora-xen at redhat.com
Subject: [Fedora-xen] Routing doesn't work when I boot with the Xen kernel

I have a choice of kernels to boot with in Grub,
2.6.21-2952.fc8xen
2.6.23.9-85.fc8
2.6.23.1-42.fc8

As far as I can see, I have networking set up the same on all three. 
(Besides, wouldn't they use the same configuration files at boot time?)  My
problem is, when I boot with the xen kernel, I can't get out through my
router.  I can ping everything on my eth0 or eth1 networks, just not go
through my eth0 Linksys router.  The only difference I've been able to see
is that something called "peth0" uses the same card as the NIC my router is
on.  Is this getting in the way somehow? 
eth0 Link encap:Ethernet HWaddr 00:17:31:01:C8:A8 
inet addr:192.168.1.151 Bcast:192.168.1.255 Mask:255.255.255.0 
inet6 addr: fe80::217:31ff:fe01:c8a8/64 Scope:Link 
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 
RX packets:10 errors:0 dropped:0 overruns:0 frame:0 
TX packets:47 errors:0 dropped:0 overruns:0 carrier:0 
collisions:0 txqueuelen:0 
RX bytes:494 (494.0 b) TX bytes:6566 (6.4 KiB) 

eth1 Link encap:Ethernet HWaddr 00:17:31:01:D0:20 
inet addr:192.168.0.3 Bcast:192.168.0.255 Mask:255.255.255.0 
inet6 addr: fe80::217:31ff:fe01:d020/64 Scope:Link 
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 
RX packets:29 errors:0 dropped:0 overruns:0 frame:0 
TX packets:63 errors:0 dropped:0 overruns:0 carrier:0 
collisions:0 txqueuelen:1000 
RX bytes:2412 (2.3 KiB) TX bytes:8491 (8.2 KiB) 
Interrupt:23 Base address:0xe000 

lo Link encap:Local Loopback 
inet addr:127.0.0.1 Mask:255.0.0.0 
inet6 addr: ::1/128 Scope:Host 
UP LOOPBACK RUNNING MTU:16436 Metric:1 
RX packets:8504 errors:0 dropped:0 overruns:0 frame:0 
TX packets:8504 errors:0 dropped:0 overruns:0 carrier:0 
collisions:0 txqueuelen:0 
RX bytes:10008668 (9.5 MiB) TX bytes:10008668 (9.5 MiB) 

peth0 Link encap:Ethernet HWaddr 00:17:31:01:C8:A8 
inet6 addr: fe80::217:31ff:fe01:c8a8/64 Scope:Link 
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 
RX packets:53 errors:0 dropped:0 overruns:0 frame:0 
TX packets:121 errors:0 dropped:0 overruns:0 carrier:0 
collisions:0 txqueuelen:1000 
RX bytes:5414 (5.2 KiB) TX bytes:14547 (14.2 KiB) 
Interrupt:18 

virbr0 Link encap:Ethernet HWaddr 00:00:00:00:00:00 
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link 
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 
RX packets:0 errors:0 dropped:0 overruns:0 frame:0 
TX packets:32 errors:0 dropped:0 overruns:0 carrier:0 
collisions:0 txqueuelen:0 
RX bytes:0 (0.0 b) TX bytes:5156 (5.0 KiB) 

Thanks,

-- 
Jack Smith

English doesn't borrow from other languages -- English follows other
languages down dark alleys and takes what it wants.