Configuration
PE1#
/* If logical systems are used for the lab, then
* The physical interface encapsulation (ethernet-ccc) is configured
* at the global level - NOT at logical system level
*/
interface {
ge-1/1/0 {
encapsulation ethernet-ccc;
unit 0 {
description "PE1->CE1 | Physical interface";
}
}
}
protocols {
mpls {
/* PE1->P1 */
interface lt-0/0/10.1101;
}
ospf {
area 0.0.0.0 {
/* PE1 Loopback */
interface lo0.11;
/* PE1->P1 */
interface lt-0/0/10.1101;
}
}
ldp {
/* PE1->P1 */
interface lt-0/0/10.1101;
/* PE1 Loopback */
interface lo0.11;
}
l2circuit {
neighbor 12.12.12.12 {
interface ge-1/1/0.0 {
virtual-circuit-id 1;
no-control-word;
ignore-mtu-mismatch;
}
}
}
}
PE2#
interface {
ge-1/1/1 {
encapsulation ethernet-ccc;
unit 0 {
description "PE2->CE2 | Physical interface";
}
}
}
protocols {
mpls {
/* PE2->P3 */
interface lt-0/0/10.123;
}
ospf {
area 0.0.0.0 {
/* PE2->P3 */
interface lt-0/0/10.123;
/* PE2 Loopback */
interface lo0.12;
}
}
ldp {
/* PE2->P3 */
interface lt-0/0/10.123;
/* PE2 Loopback */
interface lo0.12;
}
l2circuit {
neighbor 11.11.11.11 {
interface ge-1/1/1.0 {
virtual-circuit-id 1;
no-control-word;
ignore-mtu-mismatch;
}
}
}
}
Verification
Confirm that LDP sessions are up not only between local routers PE1-P1, but also via remote targeted LDP session PE1–PE2
pe1@MX:PE1> show ldp neighbor
Address Interface Label space ID Hold time
12.12.12.12 lo0.11 12.12.12.12:0 42
100.1.11.1 lt-0/0/10.1101 1.1.1.1:0 14
pe1@MX:PE1> show ldp database
Input label database, 11.11.11.11:0--1.1.1.1:0
Label Prefix
3 1.1.1.1/32
299776 2.2.2.2/32
299792 3.3.3.3/32
299840 4.4.4.4/32
299808 5.5.5.5/32
299824 6.6.6.6/32
299952 11.11.11.11/32
299968 12.12.12.12/32
Output label database, 11.11.11.11:0--1.1.1.1:0
Label Prefix
300112 1.1.1.1/32
300128 2.2.2.2/32
300144 3.3.3.3/32
300192 4.4.4.4/32
300160 5.5.5.5/32
300176 6.6.6.6/32
3 11.11.11.11/32
300224 12.12.12.12/32
Input label database, 11.11.11.11:0--12.12.12.12:0
Label Prefix
300160 1.1.1.1/32
300144 2.2.2.2/32
300128 3.3.3.3/32
300208 4.4.4.4/32
300176 5.5.5.5/32
300192 6.6.6.6/32
300224 11.11.11.11/32
3 12.12.12.12/32
300112 L2CKT NoCtrlWord ETHERNET VC 1
Output label database, 11.11.11.11:0--12.12.12.12:0
Label Prefix
300112 1.1.1.1/32
300128 2.2.2.2/32
300144 3.3.3.3/32
300192 4.4.4.4/32
300160 5.5.5.5/32
300176 6.6.6.6/32
3 11.11.11.11/32
300224 12.12.12.12/32
300208 L2CKT NoCtrlWord ETHERNET VC 1
Confirm that the L2CKT is up for the P2P connection between PE1–PE2. If the session is not up, then we may need to check MTU, encapsulation, VC ID.
pe1@MX:PE1> show l2circuit connections | find Neighbor
Neighbor: 12.12.12.12
Interface Type St Time last up # Up trans
ge-1/1/0.0(vc 1) rmt Up Jul 20 05:27:32 2014 1
Remote PE: 12.12.12.12, Negotiated control-word: No
Incoming label: 300208, Outgoing label: 300112
Negotiated PW status TLV: No
Local interface: ge-1/1/0.0, Status: Up, Encapsulation: ETHERNET
Packet Corner 