Sdp Commands - Alcatel-Lucent 7750 SR OS Service Manual

Global Service Configuration Commands

SDP Commands

sdp
Syntax sdp sdp-id [{gre | mpls}]
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 (i.e., 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 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 mpls keyword is specified. If a keyword is specified for
an existing sdp-id, an error is generated and the context of the CLI will not be changed to the
specified sdp-id.
The no form of this command deletes the specified SDP. Before an SDP can be deleted, it must be
administratively down (shutdown) and not bound to any services. If the specified SDP is bound to a
service, the no sdp command will fail generating an error message specifying the first bound service
found during the deletion process. If the specified sdp-id does not exist an error will be generated.
Default
none
Parameters
sdp-id — The SDP identifier.
gre — Specifies the SDP will use GRE to reach the far-end 7750 SR. Only one GRE SDP can be
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Values
1 — 17407
created to a given destination 7750 SR. Multiple GRE SDPs to a single destination 7750 SR
serve no purpose as the path taken to reach the far end 7750 SR is determined by the IGP which
will be the same for all SDPs to a given destination and there is no bandwidth reservation in GRE
tunnels.
7750 SR OS Services Guide