Junos OS

Hello,

I am trying to establish a ldp session between 2 logical routers but I fail.

This is my config (I use Junos8.3R2.8) :

root# show logical-routers R1
interfaces {
    fxp1 {
        unit 2 {
            vlan-id 2;
            family inet {
                address 10.10.10.1/24;
            }
        }
        unit 10 {
            vlan-id 10;
            family inet {
                address 12.12.12.1/24;
            }
        }
    }
    lo0 {
        unit 0 {
            family inet {
                address 100.100.100.10/32;
            }
        }
    }
}
protocols {        
    mpls {
        interface fxp1.10;
    }
    ospf {
        area 0.0.0.0 {
            interface 10.10.10.1 {
                interface-type p2mp;
                neighbor 10.10.10.2 eligible;
            }
            interface lo0.0 {
                interface-type p2mp;
            }
        }
    }
    ldp {
        transport-address 12.12.12.1;
        interface fxp1.10;
    }
}

root# show logical-routers R2   
interfaces {
    fxp2 {
        unit 2 {
            vlan-id 2;
            family inet {
                address 10.10.10.2/24;
            }
        }
        unit 10 {
            vlan-id 10;
            family inet {
                address 12.12.12.2/24;
            }
        }
    }
    lo0 {
        unit 1 {
            family inet {
                address 200.200.200.200/32;
            }
        }
    }
}
protocols {        
    mpls {
        interface fxp2.10;
    }
    ospf {
        area 0.0.0.0 {
            interface 10.10.10.2 {
                interface-type p2mp;
            }
        }
    }
    ldp {
        transport-address 12.12.12.2;
        interface fxp2.10;
    }
}
routing-options {
    router-id 200.200.200.200;

run ping logical-router R1 12.12.12.2
PING 12.12.12.2 (12.12.12.2): 56 data bytes
64 bytes from 12.12.12.2: icmp_seq=0 ttl=64 time=1.017 ms
64 bytes from 12.12.12.2: icmp_seq=1 ttl=64 time=0.391 ms
^C
--- 12.12.12.2 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.391/0.704/1.017/0.313 ms

root# run ping logical-router R2 12.12.12.1   
PING 12.12.12.1 (12.12.12.1): 56 data bytes
64 bytes from 12.12.12.1: icmp_seq=0 ttl=64 time=1.489 ms
64 bytes from 12.12.12.1: icmp_seq=1 ttl=64 time=0.328 ms
^C
--- 12.12.12.1 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.328/0.909/1.489/0.581 ms

root# run show ospf neighbor logical-router R1
Address          Interface              State     ID               Pri  Dead
10.10.10.2       fxp1.2                 Full      200.200.200.200  128    31

root# run show ldp interface logical-router R1

Can someone give me an idea?

Thank you

Hi,

Add family mpls under tour interfaces (ie fxp*.10) and it will be OK

HTH

 Thank you for your response but it is not working. I made a new config like this:

root# show logical-routers R1
interfaces {
    fxp1 {
        unit 2 {
            vlan-id 2;
            family inet {
                address 10.10.10.1/24;
            }
            family mpls;
        }
    }
}
protocols {
    mpls {
        interface fxp1.2;
    }
    ospf {
        area 0.0.0.0 {
            interface fxp1.2 {
                interface-type p2p;
                hello-interval 1;
            }
            interface fxp1.0;
        }
    }              
    ldp {
        interface fxp1.2;
    }
}

root# show logical-routers R2   
interfaces {
    fxp2 {
        unit 2 {
            vlan-id 2;
            family inet {
                address 10.10.10.2/24;
            }
            family mpls;
        }
    }
}
protocols {
    mpls {
        interface fxp2.2;
    }
    ospf {
        area 0.0.0.0 {
            interface fxp2.2 {
                interface-type p2p;
                hello-interval 1;
            }
            interface fxp2.0;
        }
    }              
    ldp {
        interface fxp2.2;
    }
}

root# show interfaces fxp1       
vlan-tagging;

[edit]
root# show interfaces fxp2   
vlan-tagging;

Now, neither ospf or other protocol are not working:

root# run show ospf interface logical-router R1
Interface           State   Area            DR ID           BDR ID          Nbrs
fxp1.2              PtToPt  0.0.0.0         0.0.0.0         0.0.0.0            0

[edit]

root# run show ldp neighbor logical-router R1

[edit]

root# run ping logical-router R1 10.10.10.2
PING 10.10.10.2 (10.10.10.2): 56 data bytes
64 bytes from 10.10.10.2: icmp_seq=0 ttl=64 time=3.782 ms
64 bytes from 10.10.10.2: icmp_seq=1 ttl=64 time=2.684 ms
^C
--- 10.10.10.2 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max/stddev = 2.684/3.233/3.782/0.549 ms

root# run monitor traffic interface fxp1
verbose output suppressed, use <detail> or <extensive> for full protocol decode
Address resolution is ON. Use <no-resolve> to avoid any reverse lookup delay.
Address resolution timeout is 4s.
Listening on fxp1, capture size 96 bytes

Reverse lookup for 224.0.0.5 failed (check DNS reachability).
Other reverse lookup failures will not be reported.
Use <no-resolve> to avoid reverse lookups on IP addresses.

13:27:51.718735 Out IP 10.10.10.1 > 224.0.0.5: OSPFv2, Hello, length 44
13:27:52.538035 Out IP 10.10.10.1 > 224.0.0.5: OSPFv2, Hello, length 44
13:27:52.938067 Out IP 10.10.10.1.ldp > 224.0.0.2.ldp: LDP, Label-Space-ID: 10.10.10.1:0, pdu-length: 38
13:27:53.498032 Out IP 10.10.10.1 > 224.0.0.5: OSPFv2, Hello, length 44

I see packets out,but nothing in. Do I need anything else to permit traffic between logical-routers ? (ping works )

Hi,

You've made some mistakes:

under logical-router R1  and R2 you've configured your ospf interfaces as Point to point but your nework mask is as on a lan

If you remove your point to point statement you ospf adjacency will come up.

root# show logical-router R1
interfaces {
    fxp1 {
        unit 2 {
            vlan-id 2;
            family inet {
                address 10.10.10.1/24;
            }
        }
    }
}
protocols {
    ospf {
        area 0.0.0.0 {
            interface fxp1.2;
        }
    }
}

root# show logical-router R2
interfaces {
    fxp2 {
        unit 2 {
            vlan-id 2;
            family inet {
                address 10.10.10.2/24;
            }
        }
    }
}
protocols {
    ospf {
        area 0.0.0.0 {
            interface fxp2.2;
        }
    }
}

root# run show ospf neighbor logical-router R1

[edit]

I don`t see any hello comming in , just out.

I think I will give up 🙂

One simple way to do it.

Reload your original config (copy/paste the one you posted) that was working even with a complete reboot ("request system reboot")

After that if the OSPF neigorship starts correctly just add MPLS family under the logical interfaces.

Your LDP session should come up.

Solved. Thanks for help.

Hi,

If these answers really helped you you can mark the good one as solved as this will help others to find some good answers.

You can also add kudos if you think It was useful !

Thanks