RoHC Profile Compression Configuration Mode Commands

The RoHC Profile Compression Configuration Mode is used to configure RoHC (Robust Header Compression) Compressor parameters. RoHC is not supported on GGSN.

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Important

The availability of commands, keywords and variables in this mode are dependent on platform type, product version, and installed license(s).

context-timeout

Context timeout in seconds.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

context-timeout seconds 
default context-timeout

default

Returns the command to its default value.

seconds

Specifies the context timeout value (in seconds) as an integer from 0 through 100.

Default: 20

Usage Guidelines

Use this command to set the context timeout.

Example

The following command sets the context timeout to 10 seconds: 
context-timeout-period 10

do show

Executes all show commands while in Configuration mode.

Product

All

Privilege

Security Administrator, Administrator

Syntax

do show

Usage Guidelines

Use this command to run all Exec mode show commands while in Configuration mode. It is not necessary to exit the Config mode to run a show command.

The pipe character | is only available if the command is valid in the Exec mode.


Caution

There are some Exec mode show commands which are too resource intensive to run from Config mode. These include: do show support collection , do show support details , do show support record and do show support summary . If there is a restriction on a specific show command, the following error message is displayed: 

Failure: Cannot execute 'do	show support' command from Config mode.

end

Exits the current configuration mode and returns to the Exec mode.

Product

All

Privilege

Security Administrator, Administrator

Syntax

end

Usage Guidelines

Use this command to return to the Exec mode.

exit

Exits the current mode and returns to the parent configuration mode.

Product

All

Privilege

Security Administrator, Administrator

Syntax

exit

Usage Guidelines

Use this command to return to the parent configuration mode.

ipid-history-size

Specifies the number of IP-IDs of previously sent packets to store. An IP ID is a 16-bit header field that stores IPv4 Identification information.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

ipid-history-size number 
default ipid-history-size

default

Returns the command to its default value.

number

Specifies the number of IP IDs to store as an integer from 1 through 32.

Default: 8

Usage Guidelines

Use this command to set the number of IP IDs to store in the history.

Example

The following command sets the history size to 24 IP-IDs: 
ipid-history-size 24

max-jitter-cd

Specifies the upper boundary of jitter expected on the communication channel between the compressor and decompressor.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

max-jitter-cd num_ms 
default max-jitter-cd

default

Returns the command to its default value.

num_ms

Specifies the number of milliseconds for the maximum jitter setting as an integer from 0 through 999999999.

Default: 150

Usage Guidelines

Use this command to set the maximum amount of jitter allowed on the communication channel between compressor and decompressor.

Example

The following command sets the jitter limit to 1000 ms (1 second): 
max-jitter-cd 1000

max-sliding-window

Specifies the width of the sliding window for W-LSB (Windows-based Least Significant Bits) encoded values.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

max-sliding-window size 
default max-sliding-window

default

Returns the command to its default value.

size

Specifies the size of the sliding window as an integer from 1 through 1000.

Default: 6

Usage Guidelines

Use this command to set the size of the sliding window used to compute jitter for W-LSB encoded values.

Example

The following command sets the sliding window size to 500: 
max-sliding-window 500

multiple-ts-stride

Enables or disables the use of repeated transmission of RTS_STRIDE for timer-based compression.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

[ no ] multiple-ts-stride

no

Disables the use of repeated transmission of RTS_STRIDE for time-based compression.

Usage Guidelines

Use this command to enable or disable a gateway's ability to repeatedly transmit RTS_STRIDE for timer-based compression.

new-context-blocking-time

Specifies the time period in seconds for blocking the establishment of new contexts after the compressor has received a feedback reject.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

new-context-blocking-time seconds 
default context-timeout

default

Returns the command to its default value.

seconds

Specifies the context blocking time (in seconds) as an integer from 0 through 100.

Default: 20

Usage Guidelines

Use this command to set the context blocking time after the compressor has received a feedback reject.

Example

The following command sets the context blocking time to 10 seconds: 
new-context-blocking-time 10

num-pkts-ts

Specifies the number packets per RTP timestamp (TS).

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

num-pkts-ts num_pkts 
default num-pkts-ts

default

Returns the command to its default value.

num_pkts

Specifies the number of packets for the timestamp as an integer from 0 through 999.

Default: 6

Usage Guidelines

Use this command to set the number of packets for each RTP timestamp (TS).

Example

The following command sets the number of packets per timestamp to 50: 
num-pkts-ts 50

num-pkts-u-mode

Specifies the number of packets sent when operating in U-Mode (unidirectional mode).

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

num-pkts-u-mode num_pkts 
default num-pkts-u-mode

default

Returns the command to its default value.

num_pkts

Specifies the number of packets sent in U-Mode as an integer from 0 through 999.

Default: 1

Usage Guidelines

Use this command to set the number of packets sent when in U-Mode.

Example

The following command sets the number of packets for U-Mode to 50: 
num-pkts-u-mode 50

num-updates-ir

Configures the number of IR (Initiation and Refresh state) updates.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

num-updates-ir num_pkts 
default num-updates-ir

default

Returns the command to its default value of 4.

num_pkts

Specifies the number of IR updates as an integer from 0 through 999.

Default: 4

Usage Guidelines

Use this command to set the number of IR updates.

Example

The following command sets the number of IR updates to 30: 
num-updates-ir 30

optimistic-repeats

Specifies the number of repeated packets to send to the decompressor. For transition from the FO (First Order) to the SO (Second Order) state, the compressor should be confident that the decompressor has all the parameters needed to decompress according to a fixed pattern.The compressor obtains its confidence about decompressor status by sending several packets with the same information according to the lower compression state. If the decompressor receives any of these packets, it is in sync with the compressor.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

optimistic-repeats num_pkts 
default optimistic-repeats

default

Returns the command to its default value.

num_pkts

Specifies the number of packets to repeat with the same information to assure synchronization with the decompressor.

num_pkts must be an integer from 0 through 10.

Default: 6

Usage Guidelines

Use this command to set the number of packets to repeat to the decompressor to assure synchronization before transition states.

Example

The following command sets the number of repeated packets to 5: 
optimistic-repeats 5

rtp-sn-p

Specifies the value of p in RTP SN (RTP Sequence Number) calculation. Least Significant Bits (LSB) encoding is used for header fields whose values are usually subject to small changes. With LSB encoding, the k least significant bits of the field value are transmitted instead of the original field value, where k is a positive integer. After receiving k bits, the decompressor derives the original value using a previously received value as reference (v_ref). The scheme is guaranteed to be correct if the compressor and the decompressor each use interpretation intervals as follows:

  • In which the original value resides

  • And in which the original value is the only value that has the exact same k least significant bits as those transmitted.

The interpretation interval can be described as a function:

f(v_ref, k). Let f(v_ref, k) = [v_ref - p, v_ref + (2^k - 1) - p]

Where p is an integer.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

rtp-sn-p p_value 
default rtp-sn-p

default

Returns the command to its default value.

p_value

Specifies the value of p in the RTP SN calculation as an integer from 0 through 999.

Default: 6

Usage Guidelines

Use this command to set the value for p when performing the RTP SN calculation.

Example

The following command sets the value of p to 100: 
rtp-sn-p 100

rtp-sn-p-override

Enables an override of p in the RTP SN calculation. This is disabled by default.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

[ default | no ] rtp-sn-p-override

default

Returns the command to its default value of disabled.

no

Disables overriding p in RTP SN calculation.

Usage Guidelines

Use this command to enable an override of p in RTP SN calculation.

Example

The following command enables the override of p in the RTP SN calculation: 
rtp-sn-p-override

rtp-time-stride

Sets the time interval used for one TS (RTP Time Stamp) stride. This interval is used when timer-based encoding is enabled.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

rtp-time-stride num_ms 
default rtp-time-stride

default

Returns the command to its default value.

num_ms

Specifies the number of milliseconds to use for TS_STRIDE as an integer from 0 through 999999999.

Default: 20

Usage Guidelines

Use this command to set the length of the TS_STRIDE in milliseconds.

Example

The following command sets TS_STRIDE to 100ms: 
rtp-time-stride 100

rtp-ts-deviation

Sets the maximum percentage of deviation allowed for input RTP packets for timer-based compression.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

rtp-ts-deviation percentage 
default rtp-ts-deviation

default

Returns the command to its default value of 25.

percentage

Specifies the maximum percentage of deviation allowed for input RTP packets for timer-based compression as an integer value from 0 through 100.

Default: 25

Usage Guidelines

Use this command to set the maximum percentage of deviation allowed for input RTP packets for timer-based compression.

Example

The following command sets the percentage to 30: 
rtp-ts-deviation 30

rtp-ts-stride

Specifies the amount by which TS (RTP time stamp) is incremented. This value is used for Scaled RTP TS encoding.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

rtp-ts-stride num_ms 
default rtp-ts-stride

default

Returns the command to its default value of 160.

num_ms

Specifies the number of milliseconds to use incrementing TS as an integer from 0 through 999999999.

Default: 160

Usage Guidelines

Use this command to set the amount by which TS is incremented for Scaled RTP TS encoding.

Example

The following command sets amount by which TS is incremented to 100ms: 
rtp-ts-stride 100

sliding-window-ts

Sets the sliding window used to compute jitter.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

sliding-window-ts size 
default sliding-window-ts

default

Returns the window to its default value of 4.

size

Specifies the size of the sliding window as an integer from 1 through 1000.

Default: 4

Usage Guidelines

Use this command to set the size of the sliding window used to compute jitter for the current RoHC profile.

Example

The following command sets the sliding window size to 500: 
sliding-window-ts 500

total-jitter-ipv4

Specifies the total jitter allowed after compression for IPv4.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

total-jitter-ipv4 time 
default total-jitter-ipv4

default

Returns the command to its default value of 270.

time

Specifies the time interval to use (in milliseconds) as an integer from 0 through 999999999.

Default: 270

Usage Guidelines

Use this command to set the jitter limit after compression.

Example

The following command sets the jitter after compression limit to 900 ms: 
total-jitter-ipv4 900

total-jitter-ipv6

Specifies the total jitter allowed after compression for IPv6.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

total-jitter-ipv6 time 
default total-jitter-ipv6

default

Returns the command to its default value 580.

time

Specifies the total jitter interval allowed (in milliseconds) as an integer from 0 through 999999999.

Default: 580

Usage Guidelines

Use this command to set the jitter limit after compression.

Example

The following command sets the jitter after compression limit to 900 ms: 
total-jitter-ipv6 900

unimode-timeout-to-fo-state

Specifies the time period in seconds before falling back to the FO (First Order) state.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

unimode-timeout-to-fo-state num_ms 
default unimode-timeout-to-fo-state

default

Returns the command to its default value of 3.

num_ms

Specifies the timeout period (in seconds) as an integer from 0 through 10.

Default: 3

Usage Guidelines

Use this command to set the timeout before falling back to the FO state when in Unimode.

Example

The following command sets the fall back timeout to 2 seconds: 
unimode-timeout-to-fo-state 2

unimode-timeout-to-ir-state

Specifies the time period in seconds before falling back to the IR (Initiation and Refresh) state.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

unimode-timeout-to-ir-state num_ms 
default unimode-timeout-to-ir-state

default

Returns the command to its default value of 5.

num_ms

Specifies the timeout period in seconds as an integer from 0 through 20.

Default: 5

Usage Guidelines

Use this command to set the timeout before falling back to the IR state when in Unimode.

Example

The following command sets the fall back timeout to 3 seconds: 
unimode-timeout-to-ir-state 3

use-calculated-rtp-time-stride

Overrides the configured value of rtp-time-stride with a calculated value.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

[ default | no ] use-calculated-rtp-time-stride

default

Returns the command to its default value of enabled.

no

Disables the use of calculated RTP time stride override.

Usage Guidelines

This command overrides the configured value of rtp-time-stride with a calculated value.

Example

The following command overrides the configured value of rtp-time-stride. 
use-calculated-rtp-time-stride

use-calculated-rtp-ts-stride

Overrides the configured value of rtp-ts-stride with a calculated value.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

[ default | no ] use-calculated-rtp-ts-stride

default

Returns the command to its default value of enabled.

no

Disables the use of calculated RTP TS time stride override.

Usage Guidelines

This command overrides the configured value of rtp-ts-stride with a calculated value.

Example

The following command overrides the configured value of rtp-ts-stride. 
use-calculated-rtp-ts-stride

use-ipid-override

Enables or disables overriding the IP-ID (IPv4 Identification header field).

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

[ default | no ] use-ipid-override

default

Returns the command to its default value of disabled.

no

Disables the IP-ID override.

Usage Guidelines

Use this command to enable overriding of the IP-ID.

Example

The following command enables the IP-ID override feature: 
use-ipid-override
The following command disables the IP-ID override feature: 
no use-ipid-override
The following command also disables the IP-ID override feature: 
default use-ipid-override

use-optimized-talkspurt

Enables or disables the use of optimized talkspurt.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

[ default | no ] use-optimized-talkspurt

default

Returns the command to its default value of enabled.

no

Disables the use of optimized talkspurt.

Usage Guidelines

Use this command to enable and disable the use of optimized talkspurt

Example

The following command enables the use of optimized talkspurt: 
use-optimized-talkspurt
The following command disables the use of optimized talkspurt: 
no use-optimized-talkspurt

use-optimized-transience

Enables or disables the use of optimized transience.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

[ default | no ] use-optimized-transience

default

Returns the command to its default value of enabled.

no

Disables the use of optimized transience.

Usage Guidelines

Use this command to enable or disable the use of optimized transience.

Example

The following command enables the use of optimized transience. 
use-optimized-transience
The following command disables the use of optimized transience. 
no use-optimized-transience

use-timer-based-compression

Enables or disables timer-based compression of the RTP time stamp (TS) at the compressor.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

[ default | no ] use-timer-based-compression

default

Returns the command to its default value of enabled.

no

Disables the use of timer-based compression.

Usage Guidelines

Use this command to enable or disable the use of timer-based compression.

Example

The following command enables the use of timer-based compression. 
use-timer-based-compression
The following command disables the use of timer-based compression. 
no use-timer-based-compression

use-uncomp-profile

Enables or disables the use of the Uncompressed Profile (0x0000) if required at the compressor.

Product

HSGW

PDSN

Privilege

Administrator

Mode

Exec > Global Configuration > RoHC Profile Configuration > RoHC Profile Compression Configuration

configure > rohc-profile profile-name profile_name > compression-options

Entering the above command sequence results in the following prompt: 

[context_name]host_name(config-rohcprofile-profile_name-comp)#

Syntax

[default | no ] useS-uncomp-profile

default

Returns the command to its default value of disabled.

no

Disables the use of the Uncompressed Profile.

Usage Guidelines

Use this command to enable or disable the use of the Uncompressed Profile.

Example

The following command enables the use of the Uncompressed Profile. 
use-uncomp-profile
The following command disables the use of the Uncompressed Profile. 
no use-uncomp-profile