Enterasys Networks CSX7000 Manual do Utilizador descarregar pdf (Página 397)

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Central Site Remote Access Switch 397

ONFIGURING

THER

DVANCED

PTIONS

PPP Configuration

RESTART TIMER

Times transmissions of Configure-Request and Terminate-Request packets. Expiration of the

Restart timer causes a Timeout event, and retransmission of the corresponding Configure-Request

or Terminate-Request packet.

LCP P

ROTOCOL FIELD COMPRESSION (PFC)

Provides a way to negotiate the compression of the Data Link Layer Protocol field.

LCP A

DDRESS CONTROL FIELD COMPRESSION (ACFC)

Provides a way to negotiate the compression of the data link layer address and control fields.

ECEIVE SETTINGS

The receive settings for PFC and ACFC control whether (and how) the system receives PPP Packets

with PFC or ACFC. Receive setting options include:

• mandatory: requested, repeated indefinitely if NAK'd

• preferable: requested, repeated up to MaxAttempts times if NAK'd

• supported: not requested, a peer request will be ACK'd

• not supported: not requested, NAK'd if the peer requests it

END SETTINGS

The send settings for PFC and ACFC control whether (and how) the system sends PPP packets with

PFC or ACFC. Send setting options include:

• mandatory: requested, repeated indefinitely if NAK'd

• preferable: requested, repeated up to MaxAttempts times if NAK'd

• supported: not requested, a peer request will be ACK'd

• not supported: not requested, NAK'd if the peer requests it

IPCP A

DDRESS NEGOTIATION INITIATION

IPCP address negotiation initiation defines when IPCP will initiate “IP address” IPCP option

negotiation. The possible choices are:

• always initiate: IPCP will always initiate the IP address option negotiation (on a PPP link).

• If IP Address Unknown: IPCP will initiate the negotiation only when the peer’s IP address is

unknown (for example, the system is running in the no-security mode, or the device entry does

not have an IP address configured.

Note: The default value is “Always Initiate.”

INK FAILURE DETECTION STATUS

You can enable or disable the link failure detection feature. If enabled, there will be a periodic

transmission of Echo-Request frames, a maintenance type frame provided by PPP’s Link Control

Protocol. Reception of the appropriate Echo-Reply frame indicates a properly functioning

connection; incorrect replies or lack of replies indicate a connection failure.

CHO FREQUENCY

This specifies, in seconds, how often the Echo-Request frames are transmitted (see above element).

The default value is 10 seconds.

AXIMUM ATTEMPTS

This specifies how many consecutive Echo-Requests are sent without receiving a reply before

declaring the PPP link to be faulty. The default value is 3 attempts.

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