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Title : LDP extension for AII reachability
Author(s) : S. DeLord, et al.
Filename : draft-delord-jounay-pwe3-ldp-aii-reachability-00.txt
Pages : 10
Date : 2008-1-15
The dynamic End-to-End Multisegment pseudowire setup requires PEs to
maintain a pseudowire routing table when using FEC129. There is
therefore a requirement for automatic Attachment Individual
Identifiers discovery. Two mechanisms already exist, a BGP based
solution and an IGP based one. Here we define a third solution
relying on LDP. It allows for automatic discovery when a PE does not
run BGP or IGP. The mechanism described here only runs on the on the
T-LDP (Targeted LDP) session between the T-PE and S-PE, but not on
any other LDP session which may exist for the tunnels. The T-PE
advertises its locally attached AIIs only for the S-PE to build its
PW routing table (the S-PE does not propagate this information
further via this mechanism).
The mechanism described here is intended to complement and interwork
with other existing autodiscovery and routing mechanisms already
described with BGP and OSPF.
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