[TriLUG] RH 9.0 routing

[Greg Brown]

netstat -rn gives me an odd response:

[root at babblefish network-scripts]# netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  
irtt Iface
192.168.16.0    0.0.0.0         255.255.255.0   U         0 0          
0 eth1
192.168.15.0    0.0.0.0         255.255.255.0   U         0 0          
0 eth0
169.254.0.0     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         192.168.15.1    0.0.0.0         UG        0 0          
0 eth0

Where on earth is that 168.254.0.0 eth1 coming from?  I certainly have 
not set that up in any of my configuration files and the actual port on 
the back of eth1 isn't connected to anything yet.

On a side note, I thought that routing was supposed to "automagically" 
work, but it doesn't seem to want to cooperate on my machine just yet.

Greg

On Monday, Sep 8, 2003, at 10:29 US/Eastern, Jon Carnes wrote:

> Always suspect Firewalls!
>
> Check to see if your Firewalls are up, if so, drop them for your
> testing.  The routing should be setup automagically, but you can check
> on it by running:
>   netstat - nr
>
> The -r says tell me the routes, the -n says, leave everything as 
> numeric
> (no hostnames, please!).  The output will look something like this:
>
> 192.168.1.0   0.0.0.0       255.255.255.0   U     0 0      0 eth0
> 10.2.0.0      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       192.168.1.1   0.0.0.0         UG    0 0      0 eth0
>
>
>
> On Mon, 2003-09-08 at 08:58, Greg Brown wrote:
>> I have a RH 9.0 machine and I need to set up routing.  I'm working
>> totally from the command line as there is no GUI installed on this box
>> at all.  Here's what I have and what I need:
>>
>> I have three 3com ethernet cards.
>>
>> eth0 will be connected to my ISP
>> eth1 will have a range of 192.168.15.0-254
>> eth2 will have a range of 192.168.16.0-254
>>
>> Here is my /etc/sysconfig/network
>> NETWORKING=yes
>> HOSTNAME=babblefish
>> GATEWAY=eth0
>> GATEWAYDEV=""
>> FORWARD_IPV4="yes"
>>
>> /etc/sysconfig/network-scripts/ifcfg-eth0 looks like:
>> DEVICE="eth0"
>> ONBOOT="yes"
>> IPADDR=""
>> NETMASK=""
>> BOOTPROTO="dhcp"
>>
>> /etc/sysconfig/network-scripts/ifcfg-eth1 looks like:
>> DEVICE="eth0"
>> ONBOOT="yes"
>> IPADDR=""
>> NETMASK=""
>> BOOTPROTO="dhcp"
>>
>> ...and so on.
>>
>> Since I have told this box that it should be forwarding packets and 
>> the
>> gateway is eth0 (from /etc/sysconfig/network) one would think this
>> setup would work but it does not.  If I cat
>> /proc/sys/net/ipv4/ip_forward I can see that it is set to 0 (i.e. no
>> routing).  Setting this file to 1 via the echo 1
>>> /proc/sys/net/ipv4/ip_forward doesn't seem to work either.
>>
>> Any ideas?
>>
>> Greg
>
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