Mpls-Tp Provider Edge And Gateway; Vll Services; Figure 8: Mpls-Tp Provider Edge And Gateway, Vll Services - Alcatel-Lucent 7450 Manual

ingress and egress directions of the same LSP segment are associated at the LER and LSR and use
the same interface (although this is not enforced by the system).
In the above model, an SDP can use one MPLS-TP LSP. This abstracts the underlying paths
towards the overlying services, which are transported on pseudowires. Pseudowires are modelled
as spoke SDPs and can also use MPLS-TP OAM. PWs with static labels may use SDPs that in-
turn use either signaled RSVP-TE LSPs, or one static MPLS-TP LSP.

MPLS-TP Provider Edge and Gateway

This section describes some example roles for the system in an MPLS-TP network.

VLL Services

The system may use MPLS TP LSPs, and PWs, to transport point to point virtual leased line
services. The 7750 may play the role of a terminating PE or switching PE for VLLs. Epipe, Apipe
and Cpipe VLLs are supported.
Figure 8
S-PE for services between
MPLS-TP Side
MPLS-TP Identifiers
Static LSP
BFD CC/CV
Linear Protection
On-Demand CV
Static PW
Static PW Status
PW Redundancy
On-Demand CV
7450 ESS MPLS Guide
illustrates the use of the system as a T-PE for services in an MPLS-TP domain, and as a
7750
TP LSP
PW Segment (Static)
SAP
TP LSP
PW Segment (Static)
SAP
7750

Figure 8: MPLS-TP Provider Edge and Gateway, VLL Services

MPLS-TP IP/MPLS
IP LSP
PW Segment (Static)
PW Switching Point
SAP
7750
MPLS and RSVP
7750
IP/MPLS Side
MPLS-TP Identifiers on PW
Dynamic IP LSP
SAP
Static PW
Static PW Status
PW Redundancy
On-Demand CV
VCCV-Ping
Static-PW Status
BFD CC/V
LSP-Ping
Linear Protection
MEP, BFD (LSP) and
Protection Endpoint
MIP
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