ADTRAN 600R manual Routerconfigwanframe Relay, Maintenance Protocol, Polling Frequency

Total Access 600R User Interface Guide (UIG)

LAN-TO-WAN (OUT)

The packets which come out toward the WAN from the 600R can be filtered in three ways:

DISABLE (DEF)	Turns off packet output filtering. No outgoing packets are blocked.
BLOCK ALL	All outgoing packets to the WAN are blocked except as defined in
	the FILTERS/OUT EXCEPTIONS list.
FORWARD ALL	All outgoing packets to the WAN are not blocked except as de-
	fined in the FILTERS/OUT EXCEPTIONS list.

OUT EXCEPTIONS

This is a list of up to 32 filter entries. The setup is exactly the same as the FILTER/IN EXCEPTIONS list.

ROUTER>CONFIG>WAN>FRAME RELAY

Frame Relay is a connection-oriented service requiring circuits to be configured by your carrier to establish a physical link between two or more locations. Multiple virtual circuits (which appear as vir- tual point-to-point links) can be run through the same physical connection.

There are two types of virtual circuits supported in Frame Relay: Permanent Virtual Circuits (PVC) and Switched Virtual Circuit (SVC). PVCs are like dedicated point-to-point private lines. Since the physical connection is always there in the form of a leased line, call setup and tear down is done by a carrier via a network management system. SVCs require setup and tear down and are generally not available from Frame Relay carriers. Virtually all Frame Relay communications are implemented using PVCs. The Total Access 600R supports PVCs only.

A number called the Data Link Connection Identifier (DLCI) identifies each virtual circuit within a shared physical channel.

Maintenance Protocol

The Frame Relay maintenance protocol is used on the WAN port. The maintenance protocol is used to send link status and virtual circuit information between Frame Relay switches and other devices (such as routers) that communicate with them. Possible choices are listed below.

ANNEX D (DEF)	This is an ANSI standard and is the most commonly used standard
	in the US.
ANNEX A	This is the CCITT European standard.
LMI	This was developed by a vendor consortium and is also known as
	the “consortium” management interface specification. It is still
	used by some carriers in the U.S.
STATIC	This should be selected when there is no Frame Relay switch in the
	circuit. The DLCIs are assigned in the DLCI Mapping and must be
	the same for the device it will communicate with.

Polling Frequency (5-30)

This parameter is the interval that the Total Access 600R polls the Frame Relay switch using the main- tenance protocol selected above. The Total Access 600R is required to poll the Frame Relay switch peri- odically to determine whether the link is active. The value is in seconds and ranges from 5 to 30 seconds with a default of 10 seconds.

64200600L1#T-31A © 2002, ADTRAN, Inc. Page 47