[c-nsp] MPLS router-ID

Mohammad Khalil eng_mssk at hotmail.com
Mon Aug 24 04:35:07 EDT 2015

Hi James
Thanks for your mail
mpls ip is missed up as I changed the setup to static routing between me and the provider :)
I suspected that the setup is not working because when I checked the forwarding-table , no label was assigned for the loopback am trying to build LDP neighborship with 
I have tested the scenario on gns3 with Cisco routers and it worked fine for me (with mpls ldp transport-address under the interface)
I have installed Junos image and integrated it with gns3 and lapped it up again ,

CE1 - Cisco PE - Junos PE - CE2

Please find the outputs
R1#sh mpls ldp neighbor
    Peer LDP Ident:; Local LDP Ident
        TCP connection: -
        State: Oper; Msgs sent/rcvd: 111/92; Downstream
        Up time: 00:14:39
        LDP discovery sources:
          FastEthernet1/0, Src IP addr:
          Targeted Hello ->, active, passive
        Addresses bound to peer LDP Ident:

root# run show l2circuit connections
Layer-2 Circuit Connections:

Legend for connection status (St)
EI -- encapsulation invalid      NP -- interface h/w not present
MM -- mtu mismatch               Dn -- down
EM -- encapsulation mismatch     VC-Dn -- Virtual circuit Down
CM -- control-word mismatch      Up -- operational
VM -- vlan id mismatch           CF -- Call admission control failure
OL -- no outgoing label          IB -- TDM incompatible bitrate
NC -- intf encaps not CCC/TCC    TM -- TDM misconfiguration
BK -- Backup Connection          ST -- Standby Connection
CB -- rcvd cell-bundle size bad  SP -- Static Pseudowire
LD -- local site signaled down   RS -- remote site standby
RD -- remote site signaled down  XX -- unknown

Legend for interface status
Up -- operational
Dn -- down
    Interface                 Type  St     Time last up          # Up trans
    em1.45(vc 45)             rmt   Up     Aug 20 11:15:25 2015           1
      Remote PE:, Negotiated control-word: No
      Incoming label: 299776, Outgoing label: 18
      Negotiated PW status TLV: No
      Local interface: em1.45, Status: Up, Encapsulation: VLAN

Now , what I have noticed is the MTU on the interfaces (and I think that is why I cannot ping between the CEs)

R1#show mpls interfaces fastEthernet 1/0 detail | inc MTU
        MTU = 1500

R1#sh int f1/1 | inc MTU
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,

F1/0 connected to Junos and F1/1 connected to CE

root# run show interfaces em0 | match MTU
  Type: Ethernet, Link-level type: Ethernet, MTU: 1514, Speed: 1000mbps
    Protocol inet, MTU: 1500
    Protocol mpls, MTU: 1500, Maximum labels: 3
      Flags: Is-Primary, User-MTU

root# run show interfaces em1 | match MTU
  Type: Ethernet, Link-level type: Ethernet, MTU: 1518, Speed: 1000mbps
    Protocol ccc, MTU: 1518

root# show interfaces em0 | display set
set interfaces em0 unit 0 family inet address
set interfaces em0 unit 0 family mpls mtu 1500

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