Sap Configuration Considerations - Alcatel-Lucent 7705 Service Manual

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Service Entities

SAP Configuration Considerations

In addition to being an entry or exit point for service traffic, a SAP has to be configured for a
service and, therefore, has properties. When configuring a SAP, consider the following.
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A SAP is a local entity and is only locally unique to a given device. The same SAP
ID value can be used on another 7705 SAR.
There are no default SAPs. All subscriber service SAPs must be created.
The default administrative state for a SAP at creation time is administratively
enabled.
When a SAP is deleted, all configuration parameters for the SAP are also deleted.
A SAP is owned by and associated with the service in which it is created.
An Ethernet port or channel with a dot1q encapsulation type means that the traffic
for the SAP is identified based on a specific IEEE 802.1Q VLAN ID value. The
VLAN ID is stripped off at SAP ingress and the appropriate VLAN ID is placed on
at SAP egress. As a result, VLAN IDs only have local significance, so the VLAN
IDs for the SAPs for a service need not be the same at each SAP.
A TDM circuit emulation service (for example, CESoPSN) requires a channel
group. The channel group must be created before it can be assigned to a SAP.
An ATM service (for example, ATM N-to-1 VCC cell transport) requires a channel
group. For this case, the channel group requires the assignment of all 24 timeslots
(T1) or 30 timeslots (E1). The timeslot assignments are made automatically after a
channel group is configured for ATM encapsulation.
If a port or channel is administratively shut down, all SAPs on that port or channel
will be operationally out of service.
A SAP cannot be deleted until it has been administratively disabled (shut down).
Each SAP can have one of the following policies assigned to it:
→ Ingress QoS policy
→ Egress QoS policy
→ Accounting policy
→ Ingress filter policy (for Epipes, Ipipes, VPRN, IES, and IES in-band
management SAPs)
7705 SAR OS Services Guide

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