Technical Documentation

Configuring H.248 Segmentation Properties

You can configure default, minimum, and maximum values for properties defined in the H.248 segmentation package. The virtual BGF uses the default values unless the gateway controller overrides them with an H.248 command. You can configure maximum and minimum values to limit the range of values accepted from the gateway controller. In general, we recommend you use the values that are configured on the router by default.

The segmentation package is defined in annex E.14 of the Gateway control protocol v3, ITU T Recommendation H.248.1, September 2005. The properties in this package affect the limits used when long H.248 replies are segmented into several H.248 messages.

To configure H.248 segmentation properties:

  1. Access the configuration of the H.248 segmentation properties.
    [edit services pgcp ]user@host# edit gateway bgf-1 h248-properties segmentation
  2. Set a default value for the number of milliseconds for the gateway controller to wait for outstanding message segments from the virtual BGF after it receives the SegmentationCompleteToken message.
    [edit services pgcp gateway bgf-1 h248-properties segmentation]user@host# set mg-segmentation-timer default 4000
  3. Set a minimum value for the number of milliseconds for the gateway controller to wait for outstanding message segments from the virtual BGF after it receives the SegmentationCompleteToken message.
    [edit services pgcp gateway bgf-1 h248-properties segmentation]user@host# set mg-segmentation-timer minimum 2000
  4. Set a maximum value for the number of milliseconds for the gateway controller to wait for outstanding message segments from the virtual BGF after it receives the SegmentationCompleteToken message.
    [edit services pgcp gateway bgf-1 h248-properties segmentation]user@host# set mg-segmentation-timer maximum 8000
  5. Set a default value, in bytes, for the MG maximum PDU size property of the segmentation package. This value determines the maximum size of messages that the gateway controller sends to the BGF.
    [edit services pgcp gateway bgf-1 h248-properties segmentation]user@host# set mg-maximum-pdu-size default 1472
  6. Set a minimum value, in bytes, for the MG maximum PDU size property of the segmentation package. This value determines the maximum size of messages that the gateway controller sends to the BGF.
    [edit services pgcp gateway bgf-1 h248-properties segmentation]user@host# set mg-maximum-pdu-size minimum 736
  7. Set a maximum value, in bytes, for the MG maximum PDU size property of the segmentation package. This value determines the maximum size of messages that the gateway controller sends to the BGF.
    [edit services pgcp gateway bgf-1 h248-properties segmentation]user@host# set mg-maximum-pdu-size maxmum 7360
  8. Set a default value for the number of milliseconds for the virtual BGF to wait for outstanding message segments from the gateway controller after it receives the SegmentationCompleteToken.
    [edit services pgcp gateway bgf-1 h248-properties segmentation]user@host# set mgc-segmentation-timer default 4000
  9. Set a minimum value for the number of milliseconds for the virtual BGF to wait for outstanding message segments from the gateway controller after it receives the SegmentationCompleteToken.
    [edit services pgcp gateway bgf-1 h248-properties segmentation]user@host# set mgc-segmentation-timer minimum 2000
  10. Set a maximum value for the number of milliseconds for the virtual BGF to wait for outstanding message segments from the gateway controller after it receives the SegmentationCompleteToken.
    [edit services pgcp gateway bgf-1 h248-properties segmentation]user@host# set mgc-segmentation-timer maximum 8000
  11. Set a default value, in bytes, for the MGC maximum PDU size property of the segmentation package. This value determines the maximum size of messages that the virtual BGF sends to the gateway controller.
    [edit services pgcp gateway bgf-1 h248-properties segmentation]user@host# set mgc-maximum-pdu-size default 1472
  12. Set a minimum value, in bytes, for the MGC maximum PDU size property of the segmentation package. This value determines the maximum size of messages that the virtual BGF sends to the gateway controller.
    [edit services pgcp gateway bgf-1 h248-properties segmentation]user@host# set mgc-maximum-pdu-size minimum 736
  13. Set a maximum value, in bytes, for the MGC maximum PDU size property of the segmentation package. This value determines the maximum size of messages that the virtual BGF sends to the gateway controller.
    [edit services pgcp gateway bgf-1 h248-properties segmentation]user@host# set mgc-maximum-pdu-size maximum 7360

Published: 2010-04-13