Hi, -The two eth0 appear since the first one is for the network attached to the eth0 and the second one is for the default router. -I forgot to mention that station C could ping all the stations including the Linux router. -About the local looping, well it seems to work fine...
Yehoram B.Y. -----Original Message----- From: yasha [mailto:[EMAIL PROTECTED] Sent: Thu, September 11, 2003 17:30 To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: Routing problem dear yehoram, [idea in the form of a question]: why are there two eth0 listed in your routing tables when you only have on listed in your interfaces list? also did you try to ping from C -> *all* and from D -> *all* ? seems like maybe there's a conflict of ip sharing? did you also remember to test local looping of the NICs? ping 127.0.0.1 to see that each NIC responds properly to itself there... [EMAIL PROTECTED] > Hi, > > I'm trying to use Linux as a small router but it is probably not my day :) > this is the configuration I have: > > +------+ > | O | > +------+ > |172.17.2.3 > | > | > |172.17.2.30 Masquerade t this interface > +--------------+ > | A - Linux | > +--------------+ > |172.16.0.1 > | > | > +------+172.16.0.2 | 172.16.0.10+------+172.30.0.1 172.30.0.10+------+ > | B |--------------------------| C |--------------------------| D | > +------+ 255.255.0.0 +------+ 255.255.0.0 +------+ > > interface I have: > eth0 Link encap:Ethernet HWaddr 00:E0:72:A0:03:1F > inet addr:172.17.2.30 Bcast:172.17.255.255 Mask:255.255.0.0 > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > RX packets:821 errors:0 dropped:0 overruns:0 frame:0 > TX packets:4 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:100 > RX bytes:75201 (73.4 kiB) TX bytes:1306 (1.2 kiB) > Base address:0x8500 > > eth1 Link encap:Ethernet HWaddr 00:E0:72:A0:03:10 > inet addr:172.16.0.1 Bcast:0.0.0.0 Mask:255.255.0.0 > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > RX packets:58 errors:0 dropped:0 overruns:0 frame:0 > TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:100 > RX bytes:9209 (8.9 kiB) TX bytes:0 (0.0 iB) > Base address:0x8400 > > lo Link encap:Local Loopback > inet addr:127.0.0.1 Mask:255.0.0.0 > UP LOOPBACK RUNNING MTU:16436 Metric:1 > RX packets:283 errors:0 dropped:0 overruns:0 frame:0 > TX packets:283 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:0 > RX bytes:82004 (80.0 kiB) TX bytes:82004 (80.0 kiB) > > this is the perliminary routing table I had: > Kernel IP routing table > Destination Gateway Genmask Flags MSS Window irtt > Iface > 172.16.0.0 0.0.0.0 255.255.0.0 U 40 0 0 > eth1 > 172.17.0.0 0.0.0.0 255.255.0.0 U 40 0 0 > eth0 > 0.0.0.0 172.17.1.10 0.0.0.0 UG 40 0 0 > eth0 > > I add the next route: > route add -net 172.30.0.0 netmask 255.255.0.0 gw 172.16.0.10 > > so now I have the next routing table: > Kernel IP routing table > Destination Gateway Genmask Flags MSS Window irtt > Iface > 172.30.0.0 172.16.0.10 255.255.0.0 UG 40 0 0 > eth1 > 172.16.0.0 0.0.0.0 255.255.0.0 U 40 0 0 > eth1 > 172.17.0.0 0.0.0.0 255.255.0.0 U 40 0 0 > eth0 > 0.0.0.0 172.17.1.10 0.0.0.0 UG 40 0 0 > eth0 > > Connection test using ping: > A --> O : OK > A --> B : OK > A --> C : OK > A --> D : OK > - > B --> A : OK > B --> O : OK > B --> C(172.16.0.10) : OK > B --> C(172.30.0.1) : Fail > B --> D : Fail > > 1. The default router for B is A. > 2. All the stations except A are Win2K/Win9X > > Any idea what I should do so that B can get to D? > > Best Regards > > Yehoram Ben-Yaacov > Better On-line Solutions > > Voice: +972 (04) 9907561 > Fax: +972 (04) 9990334 > [EMAIL PROTECTED] > http://www.boscom.com/ > > ================================================================= > To unsubscribe, send mail to [EMAIL PROTECTED] with > the word "unsubscribe" in the message body, e.g., run the command > echo unsubscribe | mail [EMAIL PROTECTED] -- free email addresses that kick ass @ http://my.schoolsucks.com ================================================================= To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
