[mpls-linux-general] Problems with networking

[Daniel G. C. <da...@on...>]

Hi! I'm Daniel and I'm making a network with some PCs with Linux-MPLS =
0.996. First of all, sorry for my english.
I have 6 PCs with Linux-MPLS working on them, the 6 PCs have similar =
hardware. I'm using 3com and Realtek ethernet cards, and I have no =
problems configuring them on Linux. Initially they are disabled and I =
activate them with ' ifconfig ', I have made the basic example with two =
hosts that is in the /mpls-linux-1.0/utils/ directory and I have no =
problems. But when I try to make a net with 3 hosts it doesn't work.

The scenario is:

   -----------  147.156.163.194               -----------   =
147.156.163.198                    -----------
  |    4     |----------------------------------|     8     =
|---------------------------------------|     7    |
   -----------               147.156.163.199  -----------                =
      147.156.163.197 -----------

And the configuration is as follows:

 On 4:
            (ethernet card configuration)
            ifconfig eth0 147.156.163.194 netmask 255.255.252.0 up
            (mpls configuration)
            route add -host 147.156.163.199 gw 147.156.163.199
            mplsadm -A -B -O gen:16:eth0:ipv4:147.156.163.199 -f =
147.156.163.199/32
            mplsadm -A -I gen:17:0
            mplsadm -L eth0:0

On 7:
            (ethernet card configuration)
            ifconfig eth0 147.156.163.197 netmask 255.255.252.0 up
            (mpls configuration)
            route add -host 147.156.163.198 gw 147.156.163.198
            mplsadm -A -B -O gen:18:eth0:ipv4:147.156.163.198 -f =
147.156.163.198/32
            mplsadm -A -I gen:17:0
            mplsadm -L eth0:0
           =20
On 8:
            (ethernet card configuration)
            ifconfig eth0 147.156.163.198 netmask 255.255.252.0 up
            ifconfig eth1 147.156.163.199 netmask 255.255.252.0 up
            (mpls configuration)
            route add -host 147.156.163.194 gw 147.156.163.194 dev eth1
            route add -host 147.156.163.197 gw 147.156.163.197 dev eth0
            mplsadm -A -B -O gen:19:eth0:ipv4:147.156.163.197 -f =
147.156.163.197/32
            mplsadm -A -B -O gen:17:eth1:ipv4:147.156.163.194 -f =
147.156.163.194/32
            mplsadm -A -I gen:19:0

            mplsadm -L eth0:0
            mplsadm -L eth1:0

When I try to make ping between 4 and 8 or between 7 and 8 I have no =
problems, but when I try ping between 4 and 7 Linux hangs and I don't =
understand what is wrong with it, can someone help me?

I have the PCs connected via cross-connect cables that are tested and =
works properly, on 4 I have a Realtek RTL 8139 (A) PCI Fast Ethernet =
card, on 7 and on 8 I have two ethernet cards, a Realtek one and a 3Com =
3c905c Tornado card. On 7 I use the 3Com card and on 8 I use the 3Com to =
connect with 7 (that uses the same kind of card) and the Realtek to =
connect with 4 (that uses the same kind of card)

Thanks in advance!

Dani