[SOLVED] Unable to Route

sunveer · 10-07-2012, 10:46 AM

I have two computers connected to the same router.

Both computers have different network range.

Computer A's ifcfg-eth0 file

Code:

IPADDR=192.168.1.10
NETMASK=255.255.255.0
GATEWAY=192.168.1.254

Computer B's ifcfg-p2p1 file

Code:

IPADDR=10.0.0.10
NETMASK=255.255.255.0
GATEWAY=10.0.0.1

I have defined route on Computer A for Computer B but unable to ping computer A from B or vice versa.

Route on Computer A (route-eth0 file)

Code:

ADDRESS0=10.0.0.0
NETMASK0=255.255.255.0
GATEWAY0=192.168.1.254

acid_kewpie · 10-08-2012, 03:56 AM

is there a route back again? please show us the full routing tables on both machines, not the config. "route -n" on both boxes should work (presuming they are both Unix)

sunveer · 10-08-2012, 04:37 AM

Quote:

Originally Posted by acid_kewpie

is there a route back again? please show us the full routing tables on both machines, not the config. "route -n" on both boxes should work (presuming they are both Unix)

On Computer A # route -n

Code:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.0.0.0        192.168.1.254   255.255.255.0   UG    0      0        0 eth0
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0 virbr0
169.254.0.0     0.0.0.0         255.255.0.0     U     1002   0        0 eth0
0.0.0.0         192.168.1.254   0.0.0.0         UG    0      0        0 eth0

On Computer B

Code:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.0.0.0        0.0.0.0         255.255.255.0   U     0      0        0 p2p1
192.168.1.0     10.0.0.1        255.255.255.0   UG    0      0        0 p2p1
169.254.0.0     0.0.0.0         255.255.0.0     U     1002   0        0 p2p1
0.0.0.0         10.0.0.1        0.0.0.0         UG    0      0        0 p2p1

KatrinAlec · 10-08-2012, 09:48 AM

You could look up your interfaces, if they are really configured as your configuration file says.
If that's correct, maybe use tcpdump to see if your ping requests arrive on the other computer.
e.g.
tcpdump -i eth0 icmp

sunveer · 10-08-2012, 08:57 PM

Problem Solved!

I have set in the route-eth0 file on computer A the gateway as the ip i.e 192.168.1.10

Now both are pinging without any problems.

However, can anyone provide the link which explains the routing concept clearly!

Now Final configuration files for help for future users.

Computer A's ifcfg-eth0

Code:

IPADDR=192.168.1.10
NETMASK=255.255.255.0
GATEWAY=192.168.1.254

Computer A's route-eth0 file

Code:

ADDRESS0=10.0.0.0
NETMASK0=255.255.255.0
GATEWAY0=192.168.1.10

Computer B's ifcfg-p2p1 file

Code:

IPADDR=10.0.0.10
NETMASK=255.255.255.0
GATEWAY=10.0.0.1

Computer B's route-p2p1 file

Code:

ADDRESS0=192.168.1.0
NETMASK0=255.255.255.0
GATEWAY0=10.0.0.10