ADTRAN TOTAL ACCESS 600R, Системное руководство

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Section 4 User Interface Guide Total Access 600R System Manual
74 © 2002 ADTRAN, Inc. 61200600L1-1A
L2 P
ROTOCOL
(T1[0] - FRE)
Configure the
L2 P
ROTOCOL
parameters and view the status of the T1 interface using Frame Relay protocol
from this menu.
L2 P
ROTOCOL
(T1[0] - FRE) > C
ONFIG
Configure the
L2 P
ROTOCOL
parameters for the T1 interface using the Frame Relay protocol.
L2 P
ROTOCOL
(T1[0] - FRE) > C
ONFIG
> M
AINTENANCE
P
ROTOCOL
The Frame Relay maintenance protocol is used on the WAN port. The maintenance protocol is used to send
link status and virtual circuit information between Frame Relay switches and other devices (such as
routers) that communicate with them. Possible choices are as follows:
The default value is
A
NNEX
D (ANSI)
.
L2 P
ROTOCOL
(T1[0] - FRE) > C
ONFIG
> P
OLLING
F
REQUENCY
(5-30)
This parameter is the interval that the unit polls the Frame Relay switch using the maintenance protocol
selected. The unit is required to poll the Frame Relay switch periodically to determine whether the link is
active. The value is in seconds and ranges from
5
to
30
seconds with a default of
10
seconds
.
L2 P
ROTOCOL
(T1[0] - FRE) > C
ONFIG
> DLCI M
APPING
This menu allows each DLCI to be mapped to a particular Frame Relay maintenance protocol. Each
protocol parameter can be individually configured for each DLCI. By factory default, the DLCI map is
empty.
When empty and a maintenance protocol other than static is used, the unit will poll the switch to determine
which DLCIs are active. These active DLCIs will attempt to determine the IP addresses on the other end of
the virtual circuit using Inverse ARP (IARP). If there is a response, the network learned will be added to
the router tables and the virtual circuit will be treated as an unnumbered interface. Bridge connections are
made using bridge group 1. When more than one DLCI mapping is listed, the unit will try to match the
DLCIs learned from the Frame Relay switch with the DLCI values in the map. If there is a match, the
protocols specified in the map are used. However, if an active DLCI is not in the list, the unit looks for an
A
NNEX
D (ANSI) This is ANSI standard ANSI T1.617-D and is the most commonly used in the
United States.
A
NNEX
A (Q933A) This is the CCITT European standard, ITU-T Q.933-A.
LMI This was developed by a vendor consortium and is also known as the
“Consortium” management interface specification. It is still used by some
carriers in the United States.
S
TATIC
(N
O
S
IG
) This should be selected when there is no Frame Relay switch in the circuit. The
Data Link Connection Identifiers (DLCIs) are assigned in the DLCI Mapping
and must be the same for the device it will communicate with.