Test Router-Based Ethernet over MPLS—Port Mode.
All interfaces are FastEthernet.
R1[CE1],F0/0<--->F0/0,R2[PE1],F0/1<--->F0/0,R4[PE2],F0/1<--->F0/0,R5[CE2]

R1-F0/0: ip address 172.16.1.1 255.255.255.252
R5-F0/0: ip address 172.16.1.2 255.255.255.252

R2:
ip cef
mpls label range 101 500000 static 16 100
mpls label protocol ldp
mpls ldp router-id Loopback0 force

interface Loopback0
ip address 10.10.10.101 255.255.255.255
R2-F0/0:
interface FastEthernet0/0
no ip address
duplex auto
speed auto
no cdp enable
xconnect 10.10.10.102 123 encapsulation mpls
R2-F0/1:
interface FastEthernet0/1
ip address 10.10.10.2 255.255.255.248
duplex auto
speed auto
mpls ip

R4:
ip cef
mpls label range 1000 500000 static 16 100
mpls label protocol ldp
mpls ldp router-id Loopback0 force

interface Loopback0
ip address 10.10.10.102 255.255.255.255

R4-F0/0:
interface FastEthernet0/0
ip address 10.10.10.4 255.255.255.248
duplex full
speed auto
mpls ip
R4-F0/1:
interface FastEthernet0/1
no ip address
duplex auto
speed auto
xconnect 10.10.10.2 123 encapsulation mpls


====================================================
R2#show xconnect all detail
Legend: XC ST=Xconnect State, S1=Segment1 State, S2=Segment2 State
UP=Up, DN=Down, AD=Admin Down, IA=Inactive, NH=No Hardware
XC ST Segment 1 S1 Segment 2 S2
------+---------------------------------+--+---------------------------------+--
DN ac Fa0/0(Ethernet) UP mpls 10.10.10.102:123 DN
Interworking: none Local VC label 101
Remote VC label unassigned
pw-class:

R2#show mpls ldp discovery
Local LDP Identifier:
10.10.10.101:0
Discovery Sources:
Interfaces:
FastEthernet0/1 (ldp): xmit/recv
LDP Id: 10.10.10.102:0; no route
Targeted Hellos:
10.10.10.101 -> 10.10.10.102 (ldp): active, xmit

10.10.10.2 -> 10.10.10.102 (ldp): passive, xmit/recv
LDP Id: 10.10.10.102:0; no route

=================================================================
R4#show mpls l2transport vc de
Local interface: Fa0/1 up, line protocol up, Ethernet up
Destination address: 10.10.10.2, VC ID: 123, VC status: down
Create time: 00:04:41, last status change time: 00:04:41
Signaling protocol: LDP, peer 10.10.10.2:0 down
MPLS VC labels: local 1000, remote unassigned
Group ID: local 0, remote unknown
MTU: local 1500, remote unknown
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, seq error 0, send 0


R4#show mpls ldp discovery
Local LDP Identifier:
10.10.10.102:0
Discovery Sources:
Interfaces:
FastEthernet0/0 (ldp): xmit/recv
LDP Id: 10.10.10.101:0; no route
Targeted Hellos:
10.10.10.102 -> 10.10.10.2 (ldp): active, xmit

============================================================


Do anyone know What kind of reason let both interface show "Remote VC label unassigned"??

Thanks for any advise.

Problem looks to be at R4.
shouldnt this line:
xconnect 10.10.10.2 123 encapsulation mpls

read:

xconnect 10.10.10.101 123 encapsulation mpls


?

Thank you correct me. It's should be
connect 10.10.10.101 123 encapsulation mpls.
and I also add some force route in R2 and R4 as below
R2: ip route 10.10.10.102 255.255.255.255 FastEthernet0/1
R4: ip route 10.10.10.101 255.255.255.255 FastEthernet0/0

Right now, remote vc label assigned done. But now have new issues are
show Output interface: unknown, imposed label stack {}.

Anyone know this issues????

I hope from R1 can ping to R5
R1#ping 172.16.1.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)


=========================================================================
R2#show mpls l2transport vc de
Local interface: Fa0/0 up, line protocol up, Ethernet up
Destination address: 10.10.10.102, VC ID: 123, VC status: down
Output interface: unknown, imposed label stack {}
Create time: 00:02:58, last status change time: 00:01:01
Signaling protocol: LDP, peer 10.10.10.102:0 up
MPLS VC labels: local 101, remote 1000
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, seq error 0, send 12

R2#show mpls ldp dis
R2#show mpls ldp discovery
Local LDP Identifier:
10.10.10.101:0
Discovery Sources:
Interfaces:
FastEthernet0/1 (ldp): xmit/recv
LDP Id: 10.10.10.102:0
Targeted Hellos:
10.10.10.101 -> 10.10.10.102 (ldp): active/passive, xmit/recv
LDP Id: 10.10.10.102:0
R2#
=========================================================================

R4#show mpls l2transport vc de
Local interface: Fa0/1 up, line protocol up, Ethernet up
Destination address: 10.10.10.101, VC ID: 123, VC status: down
Output interface: unknown, imposed label stack {}
Create time: 00:00:59, last status change time: 00:00:55
Signaling protocol: LDP, peer 10.10.10.101:0 up
MPLS VC labels: local 1000, remote 101
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, seq error 0, send 11


R4#show mpls ldp discovery
Local LDP Identifier:
10.10.10.102:0
Discovery Sources:
Interfaces:
FastEthernet0/0 (ldp): xmit/recv
LDP Id: 10.10.10.101:0
Targeted Hellos:
10.10.10.102 -> 10.10.10.101 (ldp): active/passive, xmit/recv
LDP Id: 10.10.10.101:0
R4#
====================================================================================

Thank you correct me. It's should be
connect 10.10.10.101 123 encapsulation mpls.
and I also add some force route in R2 and R4 as below
R2: ip route 10.10.10.102 255.255.255.255 FastEthernet0/1
R4: ip route 10.10.10.101 255.255.255.255 FastEthernet0/0

Right now, remote vc label assigned done. But now have new issues are
show Output interface: unknown, imposed label stack {}.

Anyone know this issues????

I hope from R1 can ping to R5
R1#ping 172.16.1.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)


=========================================================================
R2#show mpls l2transport vc de
Local interface: Fa0/0 up, line protocol up, Ethernet up
Destination address: 10.10.10.102, VC ID: 123, VC status: down
Output interface: unknown, imposed label stack {}
Create time: 00:02:58, last status change time: 00:01:01
Signaling protocol: LDP, peer 10.10.10.102:0 up
MPLS VC labels: local 101, remote 1000
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, seq error 0, send 12

R2#show mpls ldp dis
R2#show mpls ldp discovery
Local LDP Identifier:
10.10.10.101:0
Discovery Sources:
Interfaces:
FastEthernet0/1 (ldp): xmit/recv
LDP Id: 10.10.10.102:0
Targeted Hellos:
10.10.10.101 -> 10.10.10.102 (ldp): active/passive, xmit/recv
LDP Id: 10.10.10.102:0
R2#
=========================================================================

R4#show mpls l2transport vc de
Local interface: Fa0/1 up, line protocol up, Ethernet up
Destination address: 10.10.10.101, VC ID: 123, VC status: down
Output interface: unknown, imposed label stack {}
Create time: 00:00:59, last status change time: 00:00:55
Signaling protocol: LDP, peer 10.10.10.101:0 up
MPLS VC labels: local 1000, remote 101
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, seq error 0, send 11


R4#show mpls ldp discovery
Local LDP Identifier:
10.10.10.102:0
Discovery Sources:
Interfaces:
FastEthernet0/0 (ldp): xmit/recv
LDP Id: 10.10.10.101:0
Targeted Hellos:
10.10.10.102 -> 10.10.10.101 (ldp): active/passive, xmit/recv
LDP Id: 10.10.10.101:0
R4#
====================================================================================

It really should not be using static routing, your IGP should be advertising the 32bit mask LDP loopback addresses to the other routers.

It looks like the LSP is down because the LDP addresses are not being distributed correctly?

I'm not sure. How do you think I posted "mpls ldp discovery" log?
Does it can prove LDP working well?

Thanks for your advise.

Have a look here:
http://networking-forum.com/blog/?p=246


See if that helps you.