Virtual Private LAN Service
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FD 100/320Gbps NT and FX NT IHub Services Guide
3HH-11985-AAAA-TQZZA Issue: 13
5.2 VPLS used in the NT
The ISAM NT makes use of the m-VPLS service, the v-VPLS service for
VLAN-based services over a EMAN network and the VPLS service for L2 VPN using
PW over a MPLS/IP network.
v-VPLS services and m-VPLS services make only use of Service Access Points
(SAPs) to interact with the external world. VPLS services in addition make use of
spoke/mesh SDPs.
The operator can configure VPLS SAPs on ports which have been configured with
mode “access” or “hybrid”. On ports which have been configured with mode
“network” no SAPs can be defined.
Access Ports can be of category:
• Residential: ports facing the subscriber side (facing ISAM LTs)
• Regular: ports facing the network side. These ports can be grouped in a LAG.
Figure 13 ISAM residential and regular access ports
In a public access network, residential access ports are connected to subtending
ISAMs or LTs and are considered untrusted.
Regular access ports are connected to the EMAN, or directly to service provider
equipment (for example, BRAS) and are considered to be trusted.
Network ports (which are by definition of category regular) are connected to the
IP/MPLS network giving access to the service provider equipment. Only network
ports support MPLS traffic and support the origination/termination of MPLS
pseudowires.
Regular Port (trusted)
Residential Port (untrusted by default)
Legend:
EMAN
LAG
LT
NT
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