Nokia 7705 SAR-W Series - Figure 24 Mldp FEC for Single as with Transit Ipv4 Opaque

Label Distribution Protocol
398
MPLS Guide
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For mLDP to be able to signal through a multiple-AS network where the intermediate
nodes do not have a routing path to the root, a recursive opaque value is needed.
The LDP FEC root resolves the local ASBR, and the recursive opaque value contains
the point-to-multipoint FEC element, encoded as specified in RFC 6513, with a type
field, a length field, and a value field of its own.
RFC 6826 section 3 defines the Transit IPv4 opaque for point-to-multipoint LDP FEC,
where the leaf in the local AS wants to establish an LSP to the root for point-to-
multipoint LSP. Figure 24 shows FEC in this network configuration.
Figure 24 mLDP FEC for Single AS with Transit IPv4 Opaque
Figure 25 shows an inter-AS FEC with recursive opaque based on RFC 6512.
sw1301
LDP Fec:
Root 10.0.0.14
Opaque <S1, G1>
PE-2
(LEAF)
10.0.0.8
SAR Core AS1
Host
Source
Join S1, G1
PIM Join
(S1, G1)
PIM Join
(S1, G1)
S1, G1
10.60.3.2, 192.0.2.60
IGP, eBGP, mLDP
PE-1
(ROOT-1)
10.0.0.14