[c-nsp] mpls bgp forwarding ?

[kevin gannon]

Having a strange problem with IPv4 and send-label. The topology is the
below. I originate 100.100.100.16
from AS16 and it reaches AS19.

R16-------eBGP+send-label----------R17-------IGP
BGP+send-label-----R18---------eBGP send-label--------R19
AS16
AS17
AS17                                              AS19
100.100.100.16



On R18 I see the label installed for 100.100.100.16

R18#show mpls for
Local  Outgoing      Prefix            Bytes Label   Outgoing   Next Hop
Label  Label or VC   or Tunnel Id      Switched      interface
16     Pop Label     189.189.189.9/32  0             Fa1/1
189.189.189.9
17     Pop Label     100.100.100.17/32 0             Fa1/0
178.178.178.7
18     20            100.100.100.16/32 0             Fa1/0
178.178.178.7
19     Pop Label     100.100.100.19/32 0             Fa1/1
189.189.189.9


show ip bgp 100.100.100.16
BGP routing table entry for 100.100.100.16/32, version 2
Paths: (1 available, best #1, table Default-IP-Routing-Table)
  Advertised to update-groups:
     2
  16
    100.100.100.17 (metric 2) from 100.100.100.17 (100.100.100.17)
      Origin IGP, metric 0, localpref 100, valid, internal, best,
      mpls labels in/out 18/20
R18(config)#


However on R19 I receive the label via eBGP. However I do not install into
the
MPLS forwarding table but I do not know why ??

R19#show ip bgp 100.100.100.16
BGP routing table entry for 100.100.100.16/32, version 7
Paths: (1 available, best #1, table Default-IP-Routing-Table)
  Not advertised to any peer
  17 16
    189.189.189.8 from 189.189.189.8 (100.100.100.18)
      Origin IGP, localpref 100, valid, external, best,
      mpls labels in/out nolabel/18


R19#
R19#show mpls for
Local  Outgoing      Prefix            Bytes Label   Outgoing   Next Hop
Label  Label or VC   or Tunnel Id      Switched      interface
16     Pop Label     189.189.189.8/32  0             Fa1/0
189.189.189.8