10-5
Cisco SCE 8000 10GBE Software Configuration Guide
OL-30621-02
Chapter 10 Managing Subscribers
Information About Subscribers
Similarly, IP addresses and IP ranges also varies based on the const db value of the Dual stack mode.
The number of static subscribers and VLAN subscribers are not based on the const db value of the Dual
stack mode. These are dependent on the type of subscriber logged in first.
Working with Large Numbers of Subscribers
A very large number of subscribers, approaching the upper limit of the SCOS capacity, is more typical
in mobile installations. As the actual number of subscriber increases, the impact is expected to be
approximately four flows per subscriber.
Actual Maximum Number of Subscribers
As shown in
, there is an absolute maximum numbers of subscribers based on SCOS capacity.
However, the actual maximum number of subscribers supported is based on the limit specified while
loading the SCA BB application.
There are two ways to specify the actual maximum number of subscribers:
•
The capacity options mechanism: This mechanism is based on various capacity options supplied by
the application. The actual capacity option used is either specified while loading the application or
a previously-configured default capacity option is used.
•
Specific capacity CLI command (see
“Configuring the Actual Maximum Number of Subscribers”
): This specific command overrides the capacity option configured when
loading the application. It provides the following options:
100K, 250K, 500K, 1M
Subscriber Mapping Limits
Refer to
for the maximum number of IP mappings permitted per single subscriber. An IP
mapping may be either a single IP address or a range of addresses.
Rate of Creating Anonymous Subscribers
The maximum rate for creation of anonymous subscribers is 360 per second.
Aging Subscribers
Subscribers can be aged automatically by the Cisco SCE platform. ‘Aging’ is the automatic removal of
a subscriber, performed when no traffic sessions assigned to it have been detected for a certain amount
of time. The most common usage for aging is for anonymous subscribers, since this is the easiest way to
ensure that anonymous subscribers that have logged-out of the network are removed from the Cisco SCE
platform and are no longer occupying resources. Aging time can be configured individually for
introduced subscribers and for anonymous subscribers.
Table 10-3
Maximum Number of IP Mappings per Single Subscriber
Mode
Pure IP
Private IP
Standalone
1024
200
Cascade
200
50