all i can think of now is it's a routing issue- here is my route -n on
dom0:
10.255.0.0 10.254.1.254 255.255.255.0 UG 0 0 0 eth0
10.254.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
10.1.1.0 0.0.0.0 255.255.255.0 U 0 0 0 xen-br1
10.254.0.0 10.254.1.254 255.255.0.0 UG 0 0 0 eth0
0.0.0.0 10.1.1.254 0.0.0.0 UG 0 0 0 xen-br1
and from domU:
Destination Gateway Genmask Flags Metric Ref Use
Iface
10.255.0.129 10.254.1.254 255.255.255.255 UGH 0 0 0 eth0
10.255.0.0 10.254.1.254 255.255.255.0 UG 0 0 0 eth0
10.254.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
10.1.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
10.254.0.0 10.254.1.254 255.255.0.0 UG 0 0 0 eth0
0.0.0.0 10.1.1.254 0.0.0.0 UG 0 0 0 eth1
so, it looks to me like both things are routing correctly ... but I can't
get anywhere through the 10.1.1. subnet ... (eth1/xen-br1 (tied to dom0
eth3 which is 10.1.1.53))
arp -a (dom0):
sudo arp -a
? (10.1.1.243) at 00:11:43:FD:71:8C [ether] on xen-br1
? (10.254.1.254) at <incomplete> on eth0
no arp -a output on domU
ifconfig output looks good, as well as brctl, everything looks bound
correctly, although i'm still confused why vifX.1 while bound to xen-br1
doesn't get it's mac address ... seems odd to me
well, that's all the output i can do, and if there's nothing wrong in
these routes ... i'm stumped, one network card for me i guess =/
On Mon, 2 May 2005, Nivedita Singhvi wrote:
andrew mathes wrote:
hm, tcpdump from external -> eth3 of dom0 looks fine
tcpdump from exteran -> eth1 of domU = no reply
tcpdump from eth3 -> ext = fine
tcpdump from eth3->domU ... the ping says it's ok, but tcpdump shows
nothing
likewise domU->eth3 ... says it's pinging, but tcpdump shows nothing
so is what's happening here is both sides pinging the bridge, but nothing
is going through? i have this in dmesg:
device vif1.0 entered promiscuous mode
xen-br0: port 1(vif1.0) entering learning state
xen-br0: topology change detected, propagating
xen-br0: port 1(vif1.0) entering forwarding state
device vif1.1 entered promiscuous mode
xen-br1: port 2(vif1.1) entering learning state
xen-br1: topology change detected, propagating
xen-br1: port 2(vif1.1) entering forwarding state
so that looks good ...
i'm not supposed to make the domU gateway the same as the domO nic or
anything am i?
Sorry to come so late to this thread - but did you
share your routes (ip route show, or netstat -rn) output,
also your arp -a, ifconfig -a?
If you have two real interfaces on the same subnet,
you may need to set arp_filter on.
thanks,
Nivedita
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