Routing issue

A

Abstract

Hi Everyone,

I'm using FreeBSD version 8.1. I just installed a new internet modem given to me by my isp. They changed the internal ip address from 192.168.1.* to 192.168.2.* . I did get a new ip from the dhcp server by using the following command:

dhclient em0

I did restart the routing by using the following command:
/etc/rc.d/routing restart

Then I added the following to the file /etc/rc.conf:
Code: 
defaultrouter="192.168.2.254"

But when I try to ping the servers that need to be backed up I'm getting this message:
Code: 
ping: sendto: No route to host

When I look up the routing statistics I find the following. I've the feeling the line which starts with 192.168.1.0/24 is the reason for my problems. Does anyone has an idea what I could do to fix the routing again?

netstat -rn
Code: 
Internet:
Destination        Gateway            Flags    Refs      Use  Netif Expire
127.0.0.1          link#3             UH          0        4    lo0
192.168.1.0/24     link#1             U           0 83516320    em0
192.168.2.0/24     link#1             U           3     1112    em0
192.168.2.2        link#1             UHS         0        0    lo0

Internet6:
Destination                       Gateway                       Flags      Netif Expire
::1                               ::1                           UH          lo0
fe80::%lo0/64                     link#3                        U           lo0
fe80::1%lo0                       link#3                        UHS         lo0
ff01:3::/32                       fe80::1%lo0                   U           lo0
ff02::%lo0/32                     fe80::1%lo0                   U           lo0

The problem only exists on this server. The other computer are able to find the routes to the servers that need to be backed up.

Thank you for any help!
 
you don't have a default route
% netstat -rn
should show a line with Destination = "default" and Gateway = "192.168.2.254"

You can either manually delete routes for the old network 192.168.1 and add the default route or reboot if this is an option.
 
Hi lbol,

You are completely right. I just added the default route by using the following command:

Code: 
route add default 192.168.2.254

When I ping my servers now these response, so it all works again. There is one thing that I don't understand yet. When I type ifconfig I see the following:

Code: 
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC>
        ether 20:cf:30:51:07:32
        inet 192.168.1.74 netmask 0xffffff00 broadcast 192.168.1.255
        inet 192.168.2.2 netmask 0xffffff00 broadcast 192.168.2.255
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
plip0: flags=8810<POINTOPOINT,SIMPLEX,MULTICAST> metric 0 mtu 1500
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        options=3<RXCSUM,TXCSUM>
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
        inet6 ::1 prefixlen 128
        inet 127.0.0.1 netmask 0xff000000
        nd6 options=3<PERFORMNUD,ACCEPT_RTADV>

Why is my old ip address still listed, why is that?

Code: 
inet 192.168.1.74 netmask 0xffffff00 broadcast 192.168.1.255

Thank you for all the help!
 
You do not need to specify a defaultrouter in /etc/rc.conf, this is taken care of by dhclient.

The 'old' IP address is still listed because it's still valid, it's lease hasn't expired.
 
Hi everyone,

Thank you for the information and help. When I looked this morning the old IP address had been removed from the ifconfig table. Problems are solved.
 
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