IBM SC30-3681-08 manual Cong tries, NAK tries, Range is 1 to, Requests from another router

Con®guring PPP Interfaces (Talk 6)

PPP protocol values are all assigned such that the upper byte of the protocol is an even value and the lower byte is an odd value (a limited use of the more generalized mechanism described by the ISO 3309 extension mechanism for address ®elds). Thus, the receiver can readily detect when the leading byte of a protocol value has been omitted (the ®rst byte of the protocol ®eld is odd rather than even), so there is no ambiguity interpreting frames in the presence of PFC.

PFC, like ACFC, is a receive side capability and the previous description of ACFC applies to PFC.

Example:

set lcp parameters Config tries [20]? NAK tries [10]?

Terminate tries [10]? Retry timer (mSec) [3000]?

Note: The value immediately following the command option prompt is the current setting of that option. It is not always the default value illustrated in this chapter.

Retry timer

Sets the amount of time in milliseconds that elapses before LCP's transmission of con®gure-request (to open the link) and terminate-request (to close the link) packets is timed out. Expiration of this timer causes a timeout and the halting of con®gure-request and terminate-request packet transmission. The range is 200 to 30000 milliseconds. The default setting is 3000 milliseconds.

Con®g tries

Sets the number of times that LCP sends con®gure-request packets to a peer station to establish the opening of a PPP link. The default value is 20. The range is 1 to 100.

The retry timer starts after the ®rst con®gure-request packet is transmitted. This is done to guard against packet loss.

NAK tries

Sets the number of times that LCP sends con®gure-nak (nak = not acknowledged) packets to a peer station while attempting to open a PPP link. The default value is 10. The range is 1 to 100.

LCP sends con®gure-nak packets upon receiving con®gure-request packets with some unacceptable con®guration options. These packets are sent to refuse the offered con®guration options and to suggest modi®ed, acceptable values.

Terminate tries

Sets the number of times that LCP sends terminate-request packets

to a peer station to close a PPP link. The default value is 10. The

range is 1 to 100.

The retry timer starts after the ®rst terminate-request packet is

transmitted. This is done to guard against packet loss.

name Sets the name that the router uses when responding to authentication

requests from another router.

Chapter 33. Con®guring and Monitoring Point-to-Point Protocol Interfaces 481