[Xen-users] Unable to reach gateway from a xen domu

[Sherin George <list@xxxxxxxxxxxxxxxxxx>]

Hello,

i have an issue a gentoo xen domu. 

It has got correct IP addresses configured. 

=============================================
sh-4.0# ifconfig
eth0      Link encap:Ethernet  HWaddr aa:00:86:3d:64:01
          inet addr:XXX.XXX.XXX.100  Bcast:XXX.XXX.XXX.255  Mask:255.255.255.0
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:146301 errors:0 dropped:0 overruns:0 frame:0
          TX packets:571 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:45320764 (43.2 MiB)  TX bytes:23982 (23.4 KiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:648 errors:0 dropped:0 overruns:0 frame:0
          TX packets:648 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:111559 (108.9 KiB)  TX bytes:111559 (108.9 KiB)

sh-4.0# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
XXX.XXX.XXX.0   0.0.0.0         255.255.255.0   U     0      0        0 eth0
127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
0.0.0.0         XXX.XXX.XXX.1   0.0.0.0         UG    0      0        0 eth0
sh-4.0#
=============================================


But, I am not able to reach gateway from VPS.

=================
sh-4.0# ping -c 3 XXX.XXX.XXX.1
PING XXX.XXX.XXX.1 (XXX.XXX.XXX.1) 56(84) bytes of data.
From XXX.XXX.XXX.100 icmp_seq=1 Destination Host Unreachable
From XXX.XXX.XXX.100 icmp_seq=2 Destination Host Unreachable
>From XXX.XXX.XXX.100 icmp_seq=3 Destination Host Unreachable

--- XXX.XXX.XXX.1 ping statistics ---
3 packets transmitted, 0 received, +3 errors, 100% packet loss, time 2001ms
=================

Gateway is accessible from dom0

=====================
[root@dom0 ~]# ping -c 3 XXX.XXX.XXX.1
PING XXX.XXX.XXX.1 (XXX.XXX.XXX.1) 56(84) bytes of data.
64 bytes from XXX.XXX.XXX.1: icmp_seq=1 ttl=255 time=0.466 ms
64 bytes from XXX.XXX.XXX.1: icmp_seq=2 ttl=255 time=0.537 ms
64 bytes from XXX.XXX.XXX.1: icmp_seq=3 ttl=255 time=0.471 ms

--- XXX.XXX.XXX.1 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 0.466/0.491/0.537/0.037 ms
=====================

I have verified that bridge configuration and is fine.

I am able to reach gateway from other VPS servers.

So, the issue is quite puzzling to me. 

I will be extremely grateful for any advise you can offer in troubleshooting this problem.

Note: I replaced first three octets due to privacy reasons

--
Thanks,
Sherin


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