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MPLS Guide
mLDP FEC for Inter-AS with Recursive Opaque Value
Figure 25
PE-2
(LEAF)
10.0.0.8
IGP, iBGP, mLDP
Join S1, G1
SAR Core AS3
Host
LDP Fec: Root 10.0.0.21
PIM Join
Opaque <Root 10.0.0.14,
(S1, G1)
Opaque <S1, G1>>
As shown in
contains the original mLDP FEC. Therefore, in the leaf AS where the actual root
"10.0.0.14" is not known, the LDP FEC can be routed using the local root of ASBR.
When the FEC arrives at an ASBR that is colocated in the same AS as the actual
root, an LDP FEC with transit IPv4 opaque is generated.
Figure 26
for inter-AS.
3HE 18686 AAAB TQZZA
ASBR-3
10.0.0.21
eBGP, mLDP
LDP Fec: Root 10.0.0.2
Opaque <Root 10.0.0.14,
Opaque <S1, G1>>
Figure
25, the root "10.0.0.21" is an ASBR and the opaque value
shows an end-to-end example of a non-VPN mLDP with recursive opaque
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Use subject to Terms available at: www.nokia.com
Label Distribution Protocol
ASBR-1
10.0.0.2
IGP, iBGP, mLDP
SAR Core AS1
LDP Fec:
Root 10.0.0.14
Opaque <S1, G1>
PE-1
(ROOT-1)
10.0.0.14
S1, G1
10.60.3.2, 192.0.2.60
Source
PIM Join
(S1, G1)
sw1302
399
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