Cisco Cisco Packet Data Gateway (PDG) Fehlerbehebungsanleitung
Subscriber Configuration Mode Commands
ip header-compression ▀
Cisco ASR 5000 Series Command Line Interface Reference ▄
OL-22947-02
ip header-compression
Configures the IP packet header compression options for the current subscriber. Although this command configures IP
header compression algorithms, the IPCP negotiations determine when the header compression algorithm is applied.
header compression algorithms, the IPCP negotiations determine when the header compression algorithm is applied.
Product
All
Privilege
Security Administrator, Administrator
Syntax
Restores this command‘s default setting to the Van Jacobsen (VJ) header compression algorithm.
Disables all IP header compression.
Specifies that the Robust Header Compression (ROHC) algorithms is used for data.
Important:
ROHC is only supported for use with the PDSN.
: Apply ROHC header compression in both the uplink and downlink directions.
:
: Sets the ROHC mode to Bidirectional Optimistic mode (O-mode). In this mode packets
are sent in both directions. A feedback channel is used to send error recovery requests and
(optionally) acknowledgments of significant context updates from decompressor to compressor.
Periodic refreshes are not used in the Bidirectional Optimistic mode.
(optionally) acknowledgments of significant context updates from decompressor to compressor.
Periodic refreshes are not used in the Bidirectional Optimistic mode.
: Sets the ROHC mode to Bidirectional Reliable mode (R-mode). This mode applies an
intensive usage of a feedback channel and a strict logic at both the compressor and the decompressor
that prevents loss of context synchronization between the compressor and the decompressor.
Feedback is sent to acknowledge all context updates, including updates of the sequence number
field.
that prevents loss of context synchronization between the compressor and the decompressor.
Feedback is sent to acknowledge all context updates, including updates of the sequence number
field.
: Sets the ROHC mode to Unidirectional mode (U-mode). With this mode packets
are sent in one direction only, from the compressor to the decompressor. This mode therefore makes