From: Dirk Heilemann (dirk.heilemann@telindus.de)
Date: Thu Apr 11 2002 - 17:08:02 CEST
I located the problem in the /usr/bin/ip_network script.
Other netmasks than /8 /16 /24 do not work.
But I don't know how to change it.
Dirk
> Hi,
>
> I used DHCP while doing the first tests. Now my admin gave me a static IP
> -
> no big deal you say.... but it's not working!
>
> With DHCP:
>
> /root [root]# ifconfig eth0
> eth0 Link encap:10Mbps Ethernet HWaddr 00:60:97:16:FA:9E
> inet addr:10.16.196.169 Bcast:10.16.197.255 Mask:255.255.254.0
> UP BROADCAST NOTRAILERS RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:196809 errors:0 dropped:0 overruns:0
> TX packets:2046 errors:0 dropped:0 overruns:0
> Interrupt:10 Base address:0x300
>
> /root [root]# ping -c 3 10.16.196.169 ( my address )
>
> PING 10.16.196.169 (10.16.196.169): 56 data bytes
> 64 bytes from 10.16.196.169: icmp_seq=0 ttl=64 time=1.2 ms
> 64 bytes from 10.16.196.169: icmp_seq=1 ttl=64 time=1.0 ms
> 64 bytes from 10.16.196.169: icmp_seq=2 ttl=64 time=1.0 ms
>
> --- 10.16.196.169 ping statistics ---
> 3 packets transmitted, 3 packets received, 0% packet loss
> round-trip min/avg/max = 1.0/1.0/1.2 ms
>
> Fine fine. Now I change to the static IP. I configure eth0 and
> network
>
> /root [root]# setup -f eth0
> ... snip
>
> /root [root]# setup -f network
> ... Ooops. I see errors when adding the default GW. Network unreachable.
>
>
> /root [root]# ifconfig eth0
> eth0 Link encap:10Mbps Ethernet HWaddr 00:60:97:16:FA:9E
> inet addr:10.16.196.39 Bcast:10.16.255.255 Mask:255.255.254.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:424 errors:0 dropped:0 overruns:0
> TX packets:0 errors:0 dropped:0 overruns:0
> Interrupt:10 Base address:0x300
>
>
> You see two things here:
> - I receive packets! I even see them with tcpdump.
> - The broadcast address is wrong. 10.16.196.39/23 => 10.16.197.255
>
>
> /root [root]# ping -c 3 10.16.196.169
> --- 10.16.196.39 ping statistics ---
> 3 packets transmitted, 0 packets received, 100% packet loss
> PING 10.16.196.39 (10.16.196.39): 56 data bytes
> ping: sendto: Network is unreachable
> ping: wrote 10.16.196.39 64 chars, ret=-1
> ping: sendto: Network is unreachable
> ping: wrote 10.16.196.39 64 chars, ret=-1
> ping: sendto: Network is unreachable
> ping: wrote 10.16.196.39 64 chars, ret=-1
>
> --- 10.16.196.39 ping statistics ---
> 3 packets transmitted, 0 packets received, 100% packet loss
>
>
> So - my own interface ist not reachable - I never heard that.
>
> Changing the broadcast address with ifconfig did not solve the problem.
> Same
> with rebooting and shutting down things.
>
>
> Solutions or workarounds anyone?
>
>
> Greetings,
>
> Dirk
>
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