Re: unable to route traffic between two networks on Red Hat 6.2

[Ian Zapczynski <ianz@quarterleaf.com>]

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Yes, if I do not indicate the source interface, I can traceroute to 10.1.1.1 (or
any other machine on the 10.1.1.0 network) from the router successfully.  I can
also ping/traceroute to the 192.168.0.0 machines from the router.

I will add that I can also traceroute/ping the router's 10.1.1.100 interface from
the other machines on the 192.168.0.0 network, but using Ethereal on my router, I
see that ping requests from 192.168.0.0 clients to other 10.1.1.0 addresses come
to the router but go no further.

I have pasted the output you requested below.  I am very grateful for your time
and assistance.

-Ian

/sbin/route -n:

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.1.1.0        10.1.1.100      255.255.255.0   UG    0      0        0 eth0
10.1.1.0        0.0.0.0         255.255.255.0   U     0      0        0 eth0
192.168.0.0     192.168.1.1     255.255.0.0     UG    0      0        0 eth1
192.168.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth1
127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
0.0.0.0         10.1.1.1        0.0.0.0         UG    0      0        0 eth0

eth0      Link encap:Ethernet  HWaddr 00:50:DA:10:E6:E7
          inet addr:10.1.1.100  Bcast:10.1.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:68380 errors:0 dropped:0 overruns:0 frame:0
          TX packets:21254 errors:0 dropped:0 overruns:0 carrier:5
          collisions:199 txqueuelen:100
          Interrupt:10 Base address:0xe400

eth1      Link encap:Ethernet  HWaddr 00:04:5A:6A:86:33
          inet addr:192.168.1.1  Bcast:192.168.255.255  Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:6423 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:11211 dropped:0 overruns:0 carrier:20183
          collisions:0 txqueuelen:100
          Interrupt:5 Base address:0xe000

Camelia NASTASE wrote:

> >
> > Thanks very much for the suggestion.  This was indeed something I missed and
> > will make a note of.
> >
> > I set /etc/sysctl.conf, rebooted, and confirmed that
> > /proc/sys/net/ipv4/ip_forward contained "1", but I still can't do a ping -I
> > 192.168.1.1 10.1.1.1 nor a traceroute -i eth1 10.1.1.1.
> >
> > I hope it's just one other minor piece I'm missing.
> >
>
> but without indicating the source interface, does your traceroute work?
>
> you could give us the output from "/sbin/route -n" and "/sbin/ifconfig".
> it might help.
>
> best regards,
> camelia
> --

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