Enterasys Networks CSX6000 - Manual (Page 397)

Central Site Remote Access Switch 397
C ONFIGURING O THER A DVANCED O PTIONS
PPP Configuration
R ESTART T IMER
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 F IELD C OMPRESSION (PFC)
Provides a way to negotiate the compression of the Data Link Layer Protocol field.
LCP A DDRESS C ONTROL F IELD C OMPRESSION (ACFC)
Provides a way to negotiate the compression of the data link layer address and control fields.
R ECEIVE S ETTINGS
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
S END S ETTINGS
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 N EGOTIATION I NITIATION
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.”
L INK F AILURE D ETECTION S TATUS
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.
E CHO F REQUENCY
This specifies, in seconds, how often the Echo-Request frames are transmitted (see above element).
The default value is 10 seconds.
M AXIMUM A TTEMPTS
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.