CSCF Signalling Compression Configuration Mode Commands

CSCF Signalling Compression Configuration Mode Commands
 
 
The CSCF Signalling Compression Configuration Mode is used to set memory allocation parameters in support of SIP signalling compression. More information regarding signalling compression refer to the IETF RFC 3320 “Signaling Compression (SigComp)”.
 
note_smallImportant: The commands or keywords/variables that are available are dependent on platform type, product version, and installed license(s).
 
compression-mode
Configures the dynamic compression mode to be used while sending a SigComp message. Simple dynamic mode is the default.
Product
SCM
Privilege
Administrator
Syntax
compression-mode { multiple-dynamic | simple-dynamic | static | update-dynamic }
default compression-mode
multiple-dynamic | simple-dynamic | static | update-dynamic
Default: simple-dynamic
multiple-dynamic: A maximum of four dynamic states will be created per compartment. The dynamic states are updated for each message by deleting the oldest dynamic state and creating the new one. The dynamic states will be updated in FIFO (First In, First Out) order.
simple-dynamic: Only one dynamic state will be created per compartment. The same state will be used for compression.
static: No dynamic states will be created. Only static dictionary will be used for compression.
update-dynamic: Only one dynamic state will be created per compartment, but the dynamic state will be updated for every new message.
default compression-mode
Returns the dynamic compression mode to simple dynamic.
Usage
Use this command to configure the dynamic compression mode to be used.
Example
The following command sets the compression mode to multiple dynamic:
compression-mode multiple-dynamic
The following command completely disables the creation of dynamic states for compression:
compression-mode static
 
decompression-memory-size
Sets the amount of memory available for decompressing one SigComp message. A portion of the allocated memory is used to buffer the message before it is decompressed. The memory is allocated for each SigComp message and is reclaimed once decompression is completed.
Product
SCM
Privilege
Administrator
Syntax
decompression-memory-size { 128k | 16k | 32k | 64k | 8k }
default decompression-memory-size
128k | 16k | 32k | 64k | 8k
Default: 8k
Specifies the amount of memory (in kilobytes) to allocate for decompressing one SigComp message.
default
Returns the command to the default settings.
Usage
Use this command to set the memory size used to decompress a single SigComp message.
Example
The following command sets the memory size for decompressing SigComp messages to 16k:
decompression-memory-size 16k
 
end
Exits the current mode and returns to the Exec Mode.
Product
All
Privilege
Administrator
Syntax
end
Usage
Change the mode back to the Exec mode.
 
exit
Exits the current mode and returns to the previous mode.
Product
All
Privilege
Administrator
Syntax
exit
Usage
Return to the previous mode.
 
state-memory-size
Sets the memory allocated to a compartment for the creation of state. Compartments are application-specific groupings of messages that relate to a peer endpoint. The system allocates memory per compartment. The memory is reclaimed when the system determines that the compartment is no longer required.
Product
SCM
Privilege
Administrator
Syntax
state-memory-size { 4k | 8k }
default state-memory-size
4k | 8k
Default: 4k
Specifies the amount of memory to allocate to a compartment for the creation of state.
default
Returns the command to the default settings.
Usage
Use this command to specify a memory size allocated to message groupings for the creation of state.
Example
The following command sets the state memory size to 8k:
state-memory-size 8k
 
 
Cisco Systems Inc.
Tel: 408-526-4000
Fax: 408-527-0883