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Cisco SCE8000 Software Configuration Guide, Rel 3.1.6S
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Chapter 11 Managing the SCMP
About SCMP
Subscriber Management
The SCMP peers can work in either of two introduction modes. These introduction modes affect only
how and when a session is created on the SCE platform:
•
The SCMP peer provisions the session to the SCE platform when it is created in the peer device
(push)
•
The SCE platform queries the SCMP peer regarding unmapped IP traffic (pull).
The SCMP uses queries as a backup to the push introduction mode, to be robust to issues such as
networking problems and SCE platform reboot.
In addition to session creation, the SCMP supports the following operations:
•
Change of session policy and network IDs using the update-session message
•
Removal of the session when the user logs-out
•
Activate-policy, which changes the session policy
•
Deactivate-policy, which sets the policy value of the related anonymous-group template (based on
the session manager)
Subscriber Accounting
On session creation, the SCE platform sends an accounting start message for the session and on logout,
it sends an accounting stop message for the session. In addition, for each SCA BB service-counter an
accounting-session is maintained (start, interim and stop messages), which provides information
regarding the relevant volume, flow-count and duration.
The accounting messages are based on the new Subscriber-Accounting RDR and are sent according to
the interval defined in the PQB configuration.
SCMP Terminology
SCMP terminology is similar to, but not identical to, existing SCE platform terminology. It is derived
from the ISG terminology, since every SCE subscriber is actually an ISG session.
•
subscriber – The client who is purchasing service from the Service Provider and is receiving the bill.
•
User – A member, employee or guest at the subscriber household or business using the service.
•
Session – A logically identifiable entity on the service gateway that represents communication with
a peer. It is based on a unique combination of one or more Identity Keys such as an IP address, a
subnet, a MAC address, a tunnel termination interface (PPP) or a port.
Each session is assigned a unique identifier.
•
Flow – Characterized by several parameters identifiable from the traffic such as source IP address,
destination IP address, source port, destination port, protocol and in some cases direction.
•
SCMP Peer – A Cisco device running IOS with the ISG module enabled.
•
Identity Key – One of the keys that help identify a Session. The identity keys that are relevant to the
SCE-ISG control-bus are:
–
IP Address/Subnet
–
IP Subnet
•
Policy – Defines all aspects of subscriber session processing. A policy consists of conditions and
actions. Traffic conditions will classify traffic and allow policing actions to be applied to the traffic.
Policies may be provisioned, updated and removed. Policies may also be activated for a session or
deactivated for a session. A policy may be referred to by name.
