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Configuring Resources Settings 61

P0910464 Issue 01 Enterprise Edge Networking Operations Guide

WAN Primary Link Frame Relay Parameters

The WAN Frame Relay Parameters are:.

Setting Definition

LMI Type Lets users set the type of link management protocol used on this link.

This value must match the corresponding value set in the Frame Relay

service provider’s switch. Permitted values are ANSI, LMI, and

CCITT. The default setting is ANSI.

Polling Interval Lets users set a value, in seconds, as an interval between LMI status

inquiry messages. This value must match the corresponding value set in

the Frame Relay provider’s switch. Permitted values are between 5-30

(in seconds). The default setting is 10.

Full Enquiry Interval Lets users set the maximum number of LMI Status Enquiry messages

sent before sending a Full Status Enquiry request. This value must

match the corresponding value set in the Frame Relay provider’s

switch. Permitted values are between 1 and 255 (in seconds). The

default setting is 6.

Error Threshold Lets users set the maximum number of consecutive failures permitted

in LMI Status Enquiry before marking the link non-operational. It is

also the number of successful consecutive LMI Status Enquiry

messages that must be received before marking a link as operational.

Permitted values are between 0 and MAXINT. The default setting is 3.

Monitored Events Lets users set the number of events sampled for making decisions about

the error threshold. Set the number higher than the values set in the

error threshold. Permitted values are a number between 0 and

MAXINT. The default setting is 4.

DS Code Lets users set the differentiated services code (DSCode) recognized by

the frame relay driver for prioritization. This value is used as a mask

value. When an IP packet is sent down, the frame-relay driver checks if

the packet's DSCode field (known as TOS byte in earlier documents)

has any of the bits specified in this field set (a bitwise AND operation is

performed between this field's value and the DSCode field of the IP

packet and the result is checked for 0). If any of the bits is set (result is

non-zero), the frame relay network is signaled to handle this packet

with priority by clearing the 'D/E' (discard eligibility) bit in the frame

relay packet header. If none of the bits specified in this field are set in

the IP packet header, 'D/E' bit is set in the frame-relay packet header,

marking the packet as a likely candidate for packet drop in case of

congestion in the frame relay network.

This field's value carries the same semantics as the 'differentiated

services codepoint' discussed in RFC2474. The least significant two

bits are ignored.

Compression Enabled

PVCs

Lists PVCs on which compression is enabled. If the compression field

is Disabled, the field does not have any meaning. If the compression

level Enabled, compression and decompression are performed on the

data going to and coming from the PVCs in this list.

The value can be a comma-separated list of DLCI numbers. You can

specify a range of DLCIs by specifying the lower and upper boundaries

by a hyphen. You can mix individual numbers and ranges.

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