[mpls-linux-general] Problem for establishing a TCP session

[<Cla...@sw...>]

Hi all,

I have the same problem as Marcello described in his 
"Kernel Panic with TCP flows" message. 

I configured the following topology :

# subnets:	     10.1.2.0/24           10.1.1.0/24        
# hosts:   	A===================B=====================C
# interf:    eth0          eth0   eth2            eth2
# IPaddr:   10.1.2.20      |      10.1.1.10       |
#          	               10.1.2.10              10.1.1.20
#
# labels      ->->->->->->->->->16>->->->->->->->->->->
# & LSP :     <-<-<-<-<-<-<-<-<-17-<-<-<-<-<-<-<-<-<-<-

I'm using the mpls-linux-0.990, with the 2.4.1 linux kernel.

Everthing's working fine for ICMP or UDP flows. I'm using 
Ethereal to observe traffic and I see the labels, datas
are transmitted correctly...

But when I try to establish a TCP session, the client hangs up.
On the router B, I see the first TCP segment [SYN] 
going from the client to the host. I also see the 2nd segment
[SYN,ACK] going from the host to the client. But the 3rd segment
is never emitted from the dead client... R.I.P.

Did you solve the problem Marcello ? Does anyone have an idea ??

Thanks


						Claude Germanier



BTW here are the commands I used to set up the topology :

SUBN1=``10.1.1.0''
SUBN2=``10.1.2.0''
NMSK=``255.255.255.0''
IP1=``10.1.2.20''
IP2=``10.1.2.10''
IP3=``10.1.1.10''
IP4=``10.1.1.20''
LBL1=``16''
LBL2=``17''
#on A
route add -net $SUBN2 netmask $NMSK dev eth0
route add -host $IP4 gw $IP2           
mplsadm -vd -A -B -O gen:$LBL1:eth0:ipv4:$IP2 -f $IP4/32
mplsadm -vd -L eth0:0
mplsadm -vd -A -I gen:$LBL2:0
#on B
route add -net $SUBN2 netmask $NMSK gw $IP2
mplsadm -vd -L eth0:0
mplsadm -vd -A -B -I gen:$LBL1:0 -O gen:$LBL1:eth2:ipv4:$IP4
route add -net $SUBN1 netmask $NMSK gw $IP3
mplsadm -vd -L eth2:0
mplsadm -vd -A -B -I gen:$LBL2:0 -O gen:$LBL2:eth0:ipv4:$IP1
#on C
mplsadm -vd -L eth2:0
mplsadm -vd -A -I gen:$LBL1:0
route add -net $SUBN1 netmask $NMSK dev eth2
route add -host $IP1 gw $IP3            
mplsadm -vd -A -B -O gen:$LBL2:eth2:ipv4:$IP3 -f $IP1/32