Juniper JUNOSE SOFTWARE 11.2.X - BROADBAND ACCESS CONFIGURATION GUIDE 7-20-2010 Configuration Manual page 130

JunosE 11.2.x Broadband Access Configuration Guide
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Table 10: SRC Client and COPS Terminology (continued)
Term Description
PEP Policy enforcement point; the COPS client, which enforces policy decisions. The
JunosE COPS interface is a PEP.
PIB Policy Information Base; a collection of sets of attributes that represent configuration
information for a device.
SRC Session and Resource Control (SRC) software, formerly the Service Deployment
System (SDX) software; functions as a COPS PDP.
The JunosE Software COPS-PR implementation uses the outsourcing model that is
described in RFC 3084. In this model, the PEP delegates responsibility to the PDP to
make provisioning decisions on the PEP's behalf.
NOTE: When you upgrade from an earlier JunosE release, the software removes the
instance of SSCC that was configured with XDR.
If you are going to perform a unified ISSU from a JunosE release numbered lower than
Release 10.0.0 and you have an XDR configuration, unified ISSU is not supported while
an XDR configuration is presented.
The provisioning is event-driven and is based on policy requests rather than on an action
taken by an administrator—the provisioning is initiated when the PDP receives external
requests and PEP events. Provisioning can be performed in bulk (for example, an entire
QoS configuration) or in smaller segments (for example, updating a marking filter). The
following list shows the interaction between the PEP and the PDP during the COPS-PR
operation.
Initial connection
1.
a. PEP starts the COPS-PR connection with the PDP.
b. PDP requests synchronization.
c. PEP sends all currently provisioned policies to PDP.
Change of interface state
2.
a. PEP requests provisioning of an interface from the PDP.
b. PDP determines policies and sends provisioning data to the PEP.
c. PEP provisions the policies.
PDP requests policy provisioning
3.
a. PDP determines new policies and sends provisioning data to the PEP.
b. PEP provisions the policies.
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