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User Manual - Configuration Guide (Volume 3)
Versatile Routing Platform
Chapter 5
IPHC Configuration
5-3
Notice: After the configuration completes, please perform one “shutdown” and “no
shutdown” operation to take effect the configuration.
5.2.4 Configure the Max. Connection Number of TCP Header Compressions
The subscriber can specify the maximum connection number on an interface that
performs TCP header compression.
Please perform the following configurations in interface configuration mode.
Table VC-5-3 Configure the maximum connection number of TCP header compression
Operation Command
Configure the maximum connection number of TCP
header compression
ip tcp header-compression
Restore the default value of the maximum connection
number of TCP header compression
no ip tcp header-compression
By default, the maximum connection number of TCP header compression that the
interface allows is 16. The value ranges from 4 to 256.
Notice: After the configuration completes, please perform one “shutdown” and “no
shutdown” operation to take effect the configuration.
5.2.5 Configure the Cisco-compatible RTP header compression
Please perform the following configurations in interface configuration mode.
Table VC-5-4 Enable/Disable the Cisco-compatible RTP header compression
Operation Command
Enable the Cisco-compatible RTP Header Compression
ip rtp header-compression cisco-format
Disable the Cisco-compatible RTP Header Compression no ip rtp header-compression cisco-format
By default, Cisco-compatible RTP header compression is enabled.
5.2.6 Configure the deleting of udp_chk field from UDP header
The udp_chk field in UDP header can be set to 0, in other words, ignore UDP
checksum field when performing header compression. In this way, 2-byte length in the
header is saved.
Please perform the following configurations in interface configuration mode.
Table VC-5-5 Configure Deleting/Resetting the udp_chk Field in UDP Header
Operation Command
Delete the udp_chk field in UDP header ip rtp header-compression delete-udpchk
Reset the udp_chk field in UDP header no ip rtp header-compression delete-udpchk
By default, the udp_chk field in UDP packet field is set to 0.