Dropping connection - ignoring default gateway

Hello,
I recently upgraded a 11.0 installation running on Xen Server to 11.3

I am experiencing frequent network disconnections now. The ip address and default gateway is assigned statically. However, the system seems to ignore the default gateway after a while. Then after several minutes it seems like it comes back.

root@poe5e:~/ > route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.111.0   *               255.255.255.0   U     0      0        0 eth1
172.16.107.0    *               255.255.255.0   U     0      0        0 eth0
link-local      *               255.255.0.0     U     0      0        0 eth0
loopback        *               255.0.0.0       U     0      0        0 lo
default         172.16.107.254  0.0.0.0         UG    0      0        0 eth0
root@poe5e:~/ > ping 172.16.107.254
PING 172.16.107.254 (172.16.107.254) 56(84) bytes of data.
64 bytes from 172.16.107.254: icmp_seq=1 ttl=255 time=0.515 ms
64 bytes from 172.16.107.254: icmp_seq=2 ttl=255 time=0.484 ms
64 bytes from 172.16.107.254: icmp_seq=3 ttl=255 time=0.496 ms
64 bytes from 172.16.107.254: icmp_seq=4 ttl=255 time=0.473 ms
^C
--- 172.16.107.254 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 2997ms
rtt min/avg/max/mdev = 0.473/0.492/0.515/0.015 ms
root@poe5e:~/ > traceroute orl3akm1n
traceroute to orl3akm1n (10.111.19.19), 30 hops max, 40 byte packets using UDP
 1  172.16.107.250 (172.16.107.250)  0.405 ms   0.398 ms   0.357 ms
 2  * * *

Any thoughts why this happens? Not surprisingly, it’s pretty frustrating >:( when my sessions suddenly die and I have to coax it into routing correctly again.

Thanks.

Well, after digging further - it turns out that dhcp had given this address out to another server and that was the real culprit.

Still not sure why the traceroute is showing the 250 address and not the 254 address but that is a non-issue.