Alcatel-Lucent 7750 SR OS - Figure 8: a GRE Service Distribution Point (SDP) Pointing from ALA-A to ALA-B; Spoke and Mesh Sdps

Service Entities
Page 42 7750 SR OS Services Guide
Figure 8: A GRE Service Distribution Point (SDP) pointing from ALA-A to ALA-B
Spoke and Mesh SDPs
When an SDP is bound to a service, it is bound as either a spoke SDP or a mesh SDP. The type of
SDP indicates how flooded traffic is transmitted.
A spoke SDP is treated like the equivalent of a traditional bridge “port” where flooded traffic
received on the spoke SDP is replicated on all other “ports” (other spoke and mesh SDPs or SAPs)
and not transmitted on the port it was received.
All mesh SDPs bound to a service are logically treated like a single bridge “port” for flooded
traffic where flooded traffic received on any mesh SDP on the service is replicated to other “ports”
(spoke SDPs and SAPs) and not transmitted on any mesh SDPs.
OSSG004
SUBSCRIBERS SUBSCRIBERS
SERVICE
ACCESS
POINTS
SERVICE
ACCESS
POINTS
SERVICE
DISTRIBUTION
POINTS
SERVICE
DISTRIBUTION
POINTS
Customer
27
IP NETWORK
GRE
Encapsulation
SAP
3/1/6
dot1q
Service
Cust-27
Cust-25
Service
Cust-7
Service
Service
Cust-27
Cust-25
Service
Cust-7
Service
SDP-4
ALA-A
ALA-B
DEMUX
SAP
2/2/2
dot1q
SAP
4/1/6
dot1q
SAP
SAP
SAP
Customer
25
Customer
7
Customer
7
Customer
25
Customer
27