discovery for targeted LDP

Experts,
is there any exchange of UDP packets in case of a targeted LDP session?
Theoretically the transport TCP session should be enough because the
endpoint are configured and not discovered but still looks like hello
are exchanged:

xconnect 1.2.229.5 xxxxxx encapsulation mpls

show mpls ldp neighbor 1.2.229.5 detail
    Peer LDP Ident: 1.2.229.5:0; Local LDP Ident 1.2.224.1:0
        TCP connection: 1.2.229.5.59999 - 1.2.224.1.646
        Password: not required, none, in use
        State: Oper; Msgs sent/rcvd: 248752/241197; Downstream; Last TIB rev
sent 1076041
        Up time: 17w3d; UID: 171; Peer Id 4;
        LDP discovery sources:
>>>>>> Targeted Hello 1.2.224.1 -> 1.2.229.5, active, passive; <<<
            holdtime: infinite, hello interval: 10000 ms
        Addresses bound to peer LDP Ident:
<...>
        Peer holdtime: 180000 ms; KA interval: 60000 ms; Peer state: estab
        Clients: Dir Adj Client

Also is a target LDP session configured with the 'xconnect' totally
equal to one configured via
'mpls ldp neighbor 1.2.254.1 targeted ldp'?

Thanks,
Bit.

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Received on Mon Mar 29 2010 - 18:19:34 ART