Subscriber Services
7750 SR OS Services Guide Page 147
SDP Commands
pw-template
Syntax [no] pw-template sdp-template-id
Context config>service
Description This command configures an SDP template.
Parameters sdp-template-id — Specifies a number used to uniquely identify a template for the creation of a
Service Distribution Point (SDP. The value 0 is used as the null ID.
Values 0, 1 — 2147483647
sdp
Syntax sdp sdp-id [gre | mpls] [create]
no sdp sdp-id
Context config>service
Description This command creates or edits a Service Distribution Point (SDP). SDPs must be explicitly
configured.
An SDP is a logical mechanism that ties a far-end 7750 SR to a particular service without having to
specifically define far end SAPs. Each SDP represents a method to reach a 7750 SR router.
One method is IP Generic Router Encapsulation (GRE) which has no state in the core of the network.
GRE does not specify a specific path to the 7750 SR. A GRE-based SDP uses the underlying IGP
routing table to find the best next hop to the far end 7750 SR.
The other method is Multi-Protocol Label Switching (MPLS) encapsulation. A 7750 SR supports
both signaled and non-signaled Label Switched Paths (LSPs) through the network. Non-signaled
paths are defined at each hop through the network. Signaled paths are communicated via protocol
from end to end using Resource ReserVation Protocol (RSVP). Paths may be manually defined or a
constraint-based routing protocol (such as OSPF-TE or CSPF) can be used to determine the best path
with specific constraints.
SDPs are created and then bound to services. Many services may be bound to a single SDP. The
operational and administrative state of the SDP controls the state of the SDP binding to the service.
If sdp-id does not exist, a new SDP is created. When creating an SDP, either the gre or the mpls
keyword must be specified. SDPs are created in the admin down state (shutdown) and the no
shutdown command must be executed once all relevant parameters are defined and before the SDP
can be used.
If sdp-id exists, the current CLI context is changed to that SDP for editing and modification. For
editing an existing SDP, neither the gre nor the mpls keyword is specified. If a keyword is specified
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