Getting the WAN Interfaces to work
30
PR2000 Installation Guide
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LMI type. Configures the standard for Link Management
Information (LMI). Can be ANSI (as defined by ANSI T1.617 Annex
D), Group of Four (as defined by the Frame Relay Vendor Forum),
Q.933a (as defined by ITU/T Q.933a), and “none” (no LMI control).
The Frame Relay service provider can tell you the LMI type for you
frame relay connection.
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Frame Relay Timeouts. Next, you can configure a few timeouts
specific to the Frame Relay protocol. In the large majority of cases,
it is safe to use the default value.
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DLCI Configuration. Data Link Channel Indication. Allows you to
create one or more virtual circuits over the Frame relay link. For
each data link channel, you will be able to configure the DLCI
number and the remote IP address (which can be static or use
reverse ARP) for IP or Network Number and header compression
for IPX The PR2000 supports up to 32 simultaneous DLCIs. Also,
you can enable Predictor data compression (see not about data
compression below).
4.4.3 X.25
When you select X.25 in the encapsulation menu, you will be asked to set the
parameters specific to your X.25 connection, which include X.25 DTE
addresses, number of PVCs, packet size, protocol window sizes, and time-outs.
Your X.25 service provider should be able to help you with the required
information. X.25 can be configured to use payload data compression (see note
below).
The PR2000 also supports connection to PADs. For more information on PAD
support, please refer to Configuring X.25 PAD support.
4.4.4 HDLC
When you select HDLC in the encapsulation menu, you will be asked about
parameters that are specific to the High-Level Data Link Protocol (HDLC):
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HDLC Keepalive Interval in seconds. Time interval (in seconds)
between transmission of keep-alive messages. The remote router is
also expected to send keep-alive messages using the same interval
(or the link will be considered “down”). The valid values are from 0
(none) to 32767. Default is 10 seconds.
