[CentOS] need help

Robert Heller heller at deepsoft.com
Sat Mar 27 20:42:23 UTC 2010


At Sat, 27 Mar 2010 21:07:49 +0200 CentOS mailing list <centos at centos.org> wrote:

> 
> 
> 
> This is fedora's route table :
> root at lin [~]# netstat -rn
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags   MSS Window  irtt
> Iface
> 217.20.117.1    0.0.0.0         255.255.255.255 UH        0 0          0
> eth0
> 78.159.97.0     0.0.0.0         255.255.255.0   U         0 0          0
> eth0
> 0.0.0.0         217.20.117.1    0.0.0.0         UG        0 0          0
> eth0
> 
> and this is cent os which is not working :
> [root at lin2 ~]# netstat -rn
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags   MSS Window  irtt
> Iface
> 188.72.255.0    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
> eth0
> [root at lin2 ~]# ping 217.20.117.1
> connect: Network is unreachable

Manual setup:

[root at lin2 ~]# route add default gw 217.20.117.1 dev eth0
[root at lin2 ~]# route add host  217.20.117.1 netmask 255.255.255.255 dev eth0

Automagical setup:

[root at lin2 ~]# cat >>/etc/sysconfig/network-scripts/route-eth0
ADDRESS0=217.20.117.1
NETMASK0=255.255.255.255
EOF
[root at lin2 ~]# cat >>/etc/sysconfig/network <<EOF
GATEWAY=217.20.117.1
EOF

The *assumes* that the network (switch or router box) that eth0 is
connected to also has 217.20.117.1 connected to it.  Typically a router
'box' contains both the router and a ethernet switch: a 'pure' router
would only have two ethernet jacks, one for each of the two networks the
router routes between.  Since there is no great demand to put a single
machine on a network and since the switch hardware is dirt cheap and
since no one does coax Ethernet anymore, modern router boxes include a
switch in the 'inside' network.


> 
> 
> 
> 
> 2010/3/27 Robert Heller <heller at deepsoft.com>
> 
> > At Sat, 27 Mar 2010 20:54:04 +0200 CentOS mailing list <centos at centos.org>
> > wrote:
> >
> > >
> > >
> > >
> > > check fedora's txt i've send it is working perfect
> > > my  gateway : 217.20.117.1
> > > my ip 188.72.255.289
> > > subnet 255.255.255.0
> > > fedora 12 is working when i set ip directly but any other linux dist is
> > not
> > > :( please i need help :(
> >
> > Can you log into your fedora box and type this command at a shell prompt:
> >
> > netstat -r
> >
> > Copy and paste the results into an E-Mail message to this list.
> >
> > >
> > >
> > >
> > > 2010/3/27 John R Pierce <pierce at hogranch.com>
> > >
> > > > cahit Eyigünlü wrote:
> > > > >
> > > > > Firstly my gateway 217.20.xxx.1
> > > > >
> > > > > My ip adress 188.72.xxx.189
> > > > >
> > > >
> > > > there's something you're not telling us here, as the gateway has to be
> > > > reachable via a network, and 217.20.xxx.1 is not part of either network
> > > > shown in your route or ifconfig output.
> > > >
> > > >
> > > >
> > > > _______________________________________________
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> > > >
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> > >
> > >
> >
> > --
> > Robert Heller             -- 978-544-6933
> > Deepwoods Software        -- Download the Model Railroad System
> > http://www.deepsoft.com/  -- Binaries for Linux and MS-Windows
> > heller at deepsoft.com       -- http://www.deepsoft.com/ModelRailroadSystem/
> >
> >
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>                                                  

-- 
Robert Heller             -- 978-544-6933
Deepwoods Software        -- Download the Model Railroad System
http://www.deepsoft.com/  -- Binaries for Linux and MS-Windows
heller at deepsoft.com       -- http://www.deepsoft.com/ModelRailroadSystem/
                                                                                                                              


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