Configuring VJ TCP header compression
VJ TCP header compression was defined in RFC 1144 for use on low-speed links.
Each TCP/IP packet transmitted over a TCP connection contains a typical 40-byte TCP/IP header containing an IP header and a TCP header that are 20-byte long each. The information in some fields of these headers, however, remains the same through the lifetime of the connection and will be sent only once. In addition, although the information in some other fields changes, the changes are predictable and are within a definite range. Based on such situation, VJ TCP header compression can compress a 40-byte TCP/IP header to 3 to 5 bytes. It can significantly improve the transmission speed of some applications, such as FTP, on a low-speed serial link like PPP.
To configure VJ TCP header compression:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter interface view. | interface interface-type interface-number | N/A |
3. Enable VJ TCP header compression. | ip tcp vjcompress | By default, VJ TCP header compression is disabled. |