Specifications

Configuring Resource Pool Management
RPM Overview
DC-715
Cisco IOS Dial Technologies Configuration Guide
The session overflow limit determines the allowable number of sessions above the session limit. If the
session overflow limit is greater than zero, overflow sessions are enabled and the maximum number of
allowed sessions is the session limit plus the session overflow limit. While the session overflow limit has
been reached, any new calls are rejected. Table 44 summarizes the effects of session and session
overflow limits.
Enabling overflow sessions is useful for allocating extra sessions for preferred customers at premium
rates. Overflow sessions can also be useful for encouraging customers to adequately forecast bandwidth
usage or for special events when normal session usage is exceeded. For example, if a customer is having
a corporate-wide program and many people are expected to request remote access, you could enable
many overflow sessions and charge a premium rate for the excess bandwidth requirements.
Note An overflow call is a call received while the session limit is exceeded and is in an overflow state.
When a call is identified as an overflow call, the call maintains the overflow status throughout its
duration, even if the number of current sessions returns below the session limit.
VPDN Session and Overflow Session Limits
Cisco RPM enables you to configure base and overflow session limits per VPDN profile for managing
VPDN sessions.
Note The VDPN session and session overflow limits are independent of the limits set in the customer
profiles.
The base VPDN session limit determines the maximum number of nonoverflow sessions supported for
a VPDN profile. When the VPDN session limit is reached, if overflow sessions are not enabled, any new
VPDN calls using the VPDN profile sessions are rejected. If overflow sessions are enabled, new sessions
up to the session overflow limit are processed and marked as overflow for VPDN accounting.
The VPDN session overflow limit determines the number of sessions above the session limit allowed in
the VPDN group. If the session overflow limit is greater than zero, overflow sessions are enabled and
the maximum number of allowed sessions is the session limit plus the session overflow limit. While the
session overflow limit has been reached, any new calls are rejected.
Enabling VPDN overflow sessions is useful for allocating extra sessions for preferred customers at
premium rates. Overflow sessions are also useful for encouraging customers to adequately forecast
bandwidth usage or for special events when normal session usage is exceeded. For example, if a
Table 44 Effects of Session Limit and Session Overflow Limit Settings Combinations
Base Session
Limit
Session
Overflow Limit Call Handling
0 0 Reject all calls.
10 0 Accept up to 10 sessions.
10 10 Accept up to 20 sessions and mark sessions 11 to 20 as overflow
sessions.
0 10 Accept up to 10 sessions and mark sessions 1 to 10 as overflow.
All 0 Accept all calls.
0 All Accept all calls and mark all calls as overflow.