Cisco Cisco ASR 5700
Subscriber Configuration Mode Commands
ip header-compression ▀
Command Line Interface Reference, StarOS Release 17 ▄
8749
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.
Feedback is sent to acknowledge all context updates, including updates of the sequence number
field.
unidirectional
: 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
ROHC usable over links where a return path from the decompressor to the compressor is unavailable
or undesirable.
ROHC usable over links where a return path from the decompressor to the compressor is unavailable
or undesirable.
cid-mode { { large | small } [ marked-flows-only | dm | max-hdr
value
| mrru
value
] }
: Specifies the ROHC packet type to be used.
large | small [ marked-flows-only | max-cid | max-hdr
value
| mrru
value
]
:
Defines the ROHC packet type as large or small and optionally sets the following parameters for the
packet type selected:
packet type selected:
marked-flows-only
: Specifies that ROHC is to be applied only to marked flows.
max-cid
integer
: Default: 0 The highest context ID number to be used by the compressor.
integer
must be an integer from 0 through 15 when small packet size is selected and must be an integer from
0 through 31 when large packet size is selected.
0 through 31 when large packet size is selected.
max-hdr
value
: Specifies the maximum header size to use. Default: 168.
value
must be an Integer
from 0 through 65535.
mrru
value
: Specifies the maximum reconstructed reception unit to use. Default: 65535.
value
must
be an Integer from 0 through 65535.
marked-flows-only
: Specifies that ROHC is to be applied only to marked flows.
max-hdr
value
: Specifies the maximum header size to use. Default: 168.
value
must be an Integer from 0
through 65535.
mrru
value
: Specifies the maximum reconstructed reception unit to use. Default: 65535.
value
must be an
Integer from 0 through 65535.
downlink
: Apply the ROHC algorithm only in the downlink direction.
uplink
: Apply the ROHC algorithm only in the uplink direction.
Important:
When ROHC is enabled for downlink or uplink only the operational mode is Unidirectional.
vj
Specifies that the VJ algorithm is used for header compression.
+
Either one or both of the keywords may be entered in a single command.
If both
If both
vj
and
rohc
are specified,
vj
must be specified first.
Important:
If both VJ and ROHC header compression are specified, the optimum header compression algorithm
for the type of data being transferred is used for data in the downlink direction.
Usage
Header compression can be used to provide a higher level of security in IP traffic enhance bandwidth usage
and lower bit errors.
By default the header compression algorithm is set to
and lower bit errors.
By default the header compression algorithm is set to
vj
.
Example