Soldato
- Joined
- 24 Sep 2015
- Posts
- 3,971
I've spun up an Ubuntu 16.04.2 LTS VM on my Hyper-V hardware, I've got quite a few setup and they're all working fine but this this one has an odd entry in the routing table which is confusing me. I can't see where it's coming from:
The entry for 0.0.0.0 ia 10.255.254.1 is fine, that's the default gateway as I've specified in /etc/network/interfaces
Where does the entry for 10.0.0.0/8 come from? It's causing problems as any clients in 10/8 can't reach the VM whilst those in 172.16/12 can.
I can remove it easily enough and then clients in 10/8 can reach it:
But after a reboot that entry is back. I could script 'ip route del 10/8' to run at boot time and I could blat the VM and start from scratch but I'd like to understand where that entry is coming from.
Any ideas much appreciated!
Code:
root@newvm:~:$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.255.254.1 0.0.0.0 UG 0 0 0 eth0
10.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 eth0
root@newvm:~:$The entry for 0.0.0.0 ia 10.255.254.1 is fine, that's the default gateway as I've specified in /etc/network/interfaces
Code:
root@newvm:/etc/network:$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
source /etc/network/interfaces.d/*
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet static
address 10.255.254.11
gateway 10.255.254.1
network 10.255.254.0
broadcast 10.255.254.255
dns-nameserver 8.8.8.8 8.8.4.4
root@newvm:/etc/network:$Where does the entry for 10.0.0.0/8 come from? It's causing problems as any clients in 10/8 can't reach the VM whilst those in 172.16/12 can.
I can remove it easily enough and then clients in 10/8 can reach it:
Code:
root@newvm:/etc/network:$ ip route del 10/8
root@newvm:/etc/network:$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.255.254.1 0.0.0.0 UG 0 0 0 eth0
root@newvm:/etc/network:$But after a reboot that entry is back. I could script 'ip route del 10/8' to run at boot time and I could blat the VM and start from scratch but I'd like to understand where that entry is coming from.
Any ideas much appreciated!