[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

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