Enterasys Networks CSX6000, CSX5500, CSX7000 manual PPP Configuration

CONFIGURING OTHER ADVANCED OPTIONS

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 PROTOCOL FIELD COMPRESSION (PFC)

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

LCP ADDRESS CONTROL FIELD COMPRESSION (ACFC)

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

RECEIVE 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

SEND 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 ADDRESS 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.”

LINK 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.

ECHO FREQUENCY

This specifies, in seconds, how often the Echo-Request frames are transmitted (see above element). The default value is 10 seconds.

MAXIMUM 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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