Configuring the SRC Client to Retrieve DSL Information from Access Nodes
109
Appendix B
Transferring DSL Line Rate Information
from an Access Node to SRC Software
This appendix describes support for collection of updated DSL line rate parameters
from an access node and transfer of this information from the Common Open
Policy Service (COPS) or SRC client to the COPS server with other COPS messages.
Configuring the SRC Client to Retrieve DSL Information from Access Nodes on
page 109
Monitoring the Status of Transfer of Updated DSL Line Rate Parameters to the
COPS Server on page 112
JUNOSe Command Reference Guide Update on page 113
Configuring the SRC Client to Retrieve DSL Information from Access Nodes
Beginning with JUNOSe Release 9.3.0, you can retrieve updated DSL line rate
information from the Access Node Control Protocol (ANCP) and report this
information to the SRC software with corresponding COPS messages. ANCP is also
known as Layer 2 Control (L2C). To enable the router that functions as the SRC
client to obtain updated line rate parameters from ANCP and transmit them to the
COPS server, use the
sscc update-policy-request enable
command in Global
Configuration mode. You can configure this setting on a per-virtual-router basis.
In networks with digital subscriber line access multiplexers (DSLAMs), after a
connection is established between an subscriber and a routing gateway, the access
node or DSLAM obtains the line rate information of the subscriber using a
synchronization process. The line rate parameters are transferred in the COPS
interface request by using the ANCP topology discovery message to the router that
functions as the network access server (NAS). Typically, a COPS interface request is
sent from the access node to the SRC client whenever an interface becomes
operational.
In JUNOSe Release 9.3.0 and higher-numbered releases, you can configure the SRC
client to obtain the line rate details from the access node whenever any change in
the values of the parameters occurs. The capability to receive line rate data, when it
changes on the access node, is disabled by default on the SRC client.
