[mpls-linux-general] LER2 to HostA can't ping

[kuldonk d. <ku...@ya...>]

Hai..
i tried to built simple MPLS network. Same like “MPLS for Linux: IPv4 over MPLS: two LER one LSR example for mpls-linux-1.95x
 
and i got source rpm, from here

 
l  kernel-2.6.26.6-49.fc8.mpls.1.962.i686.
l  iproute-2.6.26-2.fc8.mpls.1.962.i386
l  ebtables-2.0.8-3.fc8.mpls.1.962.i386
l  iptables-1.4.1.1-2.fc8.mpls.1.962.i386.
l  kernel-devel-2.6.26.6-49.fc8.mpls.1.962.i686
l  kernel-headers-2.6.26.6-49.fc8.mpls.1.962.i386
l  iptables-ipv6-1.4.1.1-2.fc8.mpls.1.962.i386
l  iptables-devel-1.4.1.1-2.fc8.mpls.1.962.i386
note : i removed the old ip
route and the old iptables.
            ip_forward active "1"

 
design network
like this :
            etho     eth1        eth1        eth1       eth2         eth0
[host A] ----------- [LER1]
----------- [LER2] ------------- [host B]
            2.1          2.2        3.1           3.2           6.1            6.2
 
my configuration
is :
LER1
echo “1” > /proc/sys/net/mpls/debug
modprobe mpls4
mpls nhlfe add key 0 instructions push gen 1000
nexthop eth1 ipv4 192.168.3.2
mpls labelspace set dev eth1 labelspace 0
mpls ilm add label gen 2000 labelspace 0
mpls nhlfe add key 0 instructions nexthop eth0 ipv4
192.168.2.1
mpls xc add ilm_label gen 2000 ilm_labelspace 0
nhlfe_key 0x3
ip
route add 192.168.6.0/24 via 192.168.3.2 mpls 0x2
 
LER2
echo
“1” > /proc/sys/net/mpls/debug
modprobe mpls4
mpls nhlfe add key 0 instructions push gen 2000
nexthop eth0 ipv4 192.168.3.21
mpls labelspace set dev eth1 labelspace 0
mpls ilm add label gen 1000 labelspace 0
mpls nhlfe add key 0 instructions nexthop eth0 ipv4
192.168.6.2
mpls xc add ilm_label gen 1000 ilm_labelspace 0
nhlfe_key 0x3
ip route add 192.168.2.0/24 via 192.168.3.1 mpls 0x2
 
the problem is : can't ping from LER2 to Host A, while LER1 to host B it’s okey.             result
is : [root@localhost ~]# ping 192.168.2.1

this capture using tcpdump in LER1, when 
ler1 ping host B --- ler 2 ping host A
[root@localhost ~]# tcpdump -i eth1 -c 30
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth1, link-type EN10MB (Ethernet), capture size 96 bytes
17:31:43.995713 MPLS (label 1000, exp 0, [S], ttl 64), IP, length: 88
17:31:43.996063 IP 192.168.6.2 > 192.168.3.1: ICMP echo reply, id 43275, seq 111, length 64
17:31:44.200161 MPLS (label 2000, exp 0, [S], ttl 64), IP, length: 88
17:31:44.995725 MPLS (label 1000, exp 0, [S], ttl 64), IP, length: 88
17:31:44.996229 IP 192.168.6.2 > 192.168.3.1: ICMP echo reply, id 43275, seq 112, length 64
17:31:45.200138 MPLS (label 2000, exp 0, [S], ttl 64), IP, length: 88
17:31:45.995760 MPLS (label 1000, exp 0, [S], ttl 64), IP, length: 88

note : 
setting at every router is same.
 iptables,ip6tables,ebtales and firewall i disable