[j-nsp] L3VPN routes seem unresolvable

[Jeff S Wheeler]

Dear list,

I am having a great deal of trouble with L3VPN configured per Juniper
examples in a simple topology.  JUNOS is 7.2R1.7 with no E-FPCs
available.

In particular, I can find no documentation to shed light on the
`Indirect next-hop: 2 no-forward` condition reported on my VPN routes.
I would expect the routes to be hidden in this condition, but in fact
they are active and installed into the PFE as discard routes.  I presume
the discard next-hop is being installed because a valid next-hop cannot
be computed by rpd.

In the below `show route ...` output, a default route is advertised by
PE1 to PE2.  VPN label information seems to be correctly signalled, and
a route to PE1's loopback interface is present in PE2's inet.3 table.
PE1 is connected directly to PE2 via ATM (at-2/2/0.33 on PE1 to
at-0/3/0.33 on PE2); PE1's lo0.0 is numbered 1.2.3.4, PE2 1.2.3.5, for
the purposes of the below example output.

Any suggestions would be appreciated.

Kind regards,
--
Jeff Wheeler <jsw at inconcepts.biz>

pe2>
inet.3: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
Restart Complete
1.2.3.4/32 (1 entry, 1 announced)
        State: <FlashAll>
        *RSVP   Preference: 7
                Next-hop reference count: 33
                Next hop: via at-0/3/0.33 weight 1, selected
                Label-switched-path pe2-pe1
                State: <Active Int>
                Local AS: 55555 
                Age: 2:55:48    Metric: 11 
                Task: RSVP
                Announcement bits (2): 2-Resolve tree 1 3-Resolve tree
2 
                AS path: I

bgp.l3vpn.0: 25 destinations, 25 routes (25 active, 0 holddown, 0
hidden)
Restart Complete
1.2.3.4:999:0.0.0.0/0 (1 entry, 0 announced)
        *BGP    Preference: 170/-101
                Route Distinguisher: 1.2.3.4:999
                Next-hop reference count: 7
                Source: 1.2.3.4
                Protocol next hop: 1.2.3.4
                Push 100256
                Indirect next hop: 2 no-forward
                State: <Active Int Ext>
                Local AS: 55555 Peer AS: 55555
                Age: 5:36:38    Metric2: 11 
                Task: BGP_55555.1.2.3.4+179
                AS path: I
                Communities: 55555:19 target:999:0
                VPN Label: 100256
                Localpref: 100
                Router ID: 1.2.3.4
                Secondary Tables: vpna.inet.0
                Indirect next hops: 1
                        Protocol next hop: 1.2.3.4 Metric: 11
                        Push 100256
                        Indirect next hop: 2 no-forward
                        Indirect path forwarding next hops: 1
                Next hop:        via at-0/3/0.33 weight 1
                        1.2.3.4/32 Originating RIB: inet.3
                          Metric: 11                      Node path
count: 1
                          Forwarding nexthops: 1
                                Nexthop: via at-0/3/0.33

vpna.inet.0: 34 destinations, 34 routes (34 active, 0 holddown, 0
hidden)
Restart Complete
0.0.0.0/0 (1 entry, 1 announced)
TSI:
KRT in-kernel 0.0.0.0/0 -> {indirect(no-forward)}
        *BGP    Preference: 170/-101
                Route Distinguisher: 1.2.3.4:999
                Next-hop reference count: 7
                Source: 1.2.3.4
                Protocol next hop: 1.2.3.4
                Push 100256
                Indirect next hop: 2 no-forward
                State: <Secondary Active Int Ext>
                Local AS: 55555 Peer AS: 55555
                Age: 1:21:01    Metric2: 11 
                Task: BGP_55555.1.2.3.4+179
                Announcement bits (1): 0-KRT 
                AS path: I
                Communities: 55555:19 target:999:0
                VPN Label: 100256
                Localpref: 100
                Router ID: 1.2.3.4
                Primary Routing Table bgp.l3vpn.0
                    
pe1> show route advertising-protocol bgp 1.2.3.5 table vpna.inet.0
0.0.0.0/0 exact extensive

vpna.inet.0: 74 destinations, 77 routes (73 active, 0 holddown, 1
hidden)
Restart Complete
* 0.0.0.0/0 (1 entry, 1 announced)
 BGP group iBGP type Internal
     Route Distinguisher: 1.2.3.4:999
     VPN Label: 100256
     Nexthop: Self
     Localpref: 100
     AS path: I
     Communities: 55555:19 target:999:0