Cisco Cisco ASR 5000
CSCF Service Configuration Mode Commands
policy ▀
Command Line Interface Reference, StarOS Release 18 ▄
3331
ibcf-capability domain domain/name
Enables IBCF capability to support Mx reference point in CSCF.
IBCF capability domain name must be entered using from 1 to 80 alpha and/or numeric characters.
IBCF capability domain name must be entered using from 1 to 80 alpha and/or numeric characters.
Important:
This CLI can be repeated to add/delete multiple entities to/from the ibcf-capability domain table. An
ibcf-capability domain can be removed by using the
no
keyword; using the
no
keyword without giving any domain
name will delete all entries from the list.
overload [ drop | redirect IPv4_address1 [ weight weight1 ] [ IPv4_address2 [
weight weight2 ] ] ... | reject ]
weight weight2 ] ] ... | reject ]
Configures the overload response for this policy. When the P-CSCF/A-BG becomes congested, this overload
policy is used to drop/reject subsequent sessions or redirect them to another server.
policy is used to drop/reject subsequent sessions or redirect them to another server.
drop
: Specifies that upon policy overload, the system will drop the session.
redirect
: Specifies that upon policy overload, the system will redirect the session to another CSCF.
IPv4_address1
must be expressed in dotted decimal notation.
weight weight1
: Defines the priority of the redirect address.
weight1
must be an integer from 1 to 10. Default is 1.
reject
: Specifies that upon policy overload, the system will reject the session with 503 (Service
Unavailable) SIP error response. This is the default setting.
threshold congestion-control
{ system-cpu-utilization percent | tolerance
percent}
Enables congestion control. CSCF performs congestion control based on the memory usage inside every
sessmgr at two levels.
sessmgr at two levels.
Level 1: For every new call/event received, the system checks if sessmgr memory-usage is above a
threshold value (such as 95 percent). If it is, memory-congestion is triggered and new call messages
are rejected with 500 SIP response. Memory congestion is disabled when memory usage drops by a
tolerance value (default is 10 percent).
are rejected with 500 SIP response. Memory congestion is disabled when memory usage drops by a
tolerance value (default is 10 percent).
Level 2: If the sessmgr usage reaches 100 percent, all newly received SIP messages are dropped at the
socket layer in that sessmgr except for the BYE message. The new SIP messages are not processed
until the memory reaches the threshold value (95 percent).
until the memory reaches the threshold value (95 percent).
A trap is also generated whenever sessmgr is in congestion state
system-cpu-utilization percent
: The average percent utilization of a CPU in a PSC/PSC2/PSC3
running the CSCF service as measured in 10 second intervals.
percent
can be configured to any integer value from 0 to 100. This value becomes the upper threshold for
triggering the CPU-based congestion for CSCF services. Default is 80
tolerance percent
: The percentage under a configured threshold that dictates the point at which the
condition is cleared.
percent
is an integer value from 1 to 25. Default is 5
Usage
Use this command to set the following policy for this CSCF service:
Configure Interim-Interval value for CSCF accounting sessions.
Set QoS support during either the initial SDP response or the 200OK response to the INVITE. When
allow-early-media
is enabled, QoS commit is done during initial SDP answer. When disabled,
QoS commit is done during 200OK INVITE. By default, this command is enabled.