AIS AI2524 user manual Configure an Interface for TCP/IP Header Compression

Chapter 13: AI2524 Frame Relay Configuration Steps

In interface configuration mode, configure an IP map to use Cisco encapsulation and TCP/IP header compression:

frame-relay map ip ip-address dlci [broadcast] cisco tcp headercompression {active passive}

The default encapsulation is cisco.

Note:	An interface that is configured to support TCP/IP header
	compression cannot also support priority queuing or
	custom queuing.

Configure an Interface for TCP/IP Header Compression

You can configure the interface with active or passive TCP/IP header compression. Active compression, the default, subjects all outgoing TCP/IP packets to header compression. Passive compression subjects an outgoing packet to header compression only if the packet had a compressed TCP/IP header when it was received on that interface.

In interface configuration mode, apply TCP/IP header compression to an interface:

1.Configure Cisco encapsulation on the interface. encapsulation frame-relay

2.Enable TCP/IP header compression on the interface.

frame-relay ip tcp header-compression [passive]

Note:	If an interface configured with Cisco encapsulation is
	later configured with IETF encapsulation, all TCP/IP
	header compression characteristics are lost. To appl
	TCP/IP header compression over an interface configured
	with IETF encapsulation, you must configure individual
	IP maps, as described in the section Configure an
	Individual IP Map for TCP/IP Header Compression.

August 1997	Page 13-41
2524UM