Nortel BCM 3.7, Manual, Page: 681 / 1004

Configuring the WAN interfaces 681
Programming Operations Guide
4 Configure the WAN Frame Relay Parameters by referring to the following table.
5 Press the Tab key to save the settings.
Table 179 WAN frame relay parameters
Attribute Description
LMI Type Select the type of local management protocol used on this link. The link management type
must be the same as the one used by the frame relay service provider. The available
options are
Original LMI, ANSI T1.617 Annex D or ITU-T Q.933 Annex A .
The default setting is Original LMI .
Note : The most commonly used setting for this parameter is ANSI T1.617 Annex D .
Polling Interval Enter an interval, in seconds, between LMI status inquiry messages. The polling interval
must be the same as the one used by the frame relay service provider’s switch.
Possible values are between 5 and 30 seconds.
The default setting is 10 .
Full Enquiry Interval Enter the maximum number of LMI Status Enquiry messages sent before sending a Full
Status Enquiry request. This value must match the corresponding value set in the frame
relay service provider’s switch.
Possible values are between 1 and 255 (in seconds).
The default setting is 6 .
Error Threshold Enter the maximum number of consecutive failures permitted in LMI Status Enquiry before
dropping the link. It is also the number of successful consecutive LMI Status Enquiry
messages that must be received before marking a link as operational.
If you have a backup WAN connection and Net Link Manager configured, the backup
connection is started and traffic is routed to the backup when this link is dropped. Also, the
backup WAN connection is dropped and traffic is routed to this link when the link is
operational. For information about Net Link Manager, refer to
“Configuring Net Link
Manager” on page 733 .
Possible values are between 0 and 65000 .
The default value is 3 .
Monitored Events Enter the number of events sampled for making decisions about the error threshold. This
value must be set to a higher number than the value set in the
Error Threshold box.
Possible values are a number between 0 and 65000 .
The default value is 4 .
DS Code Enter the Differentiated Services code (DSCode) recognized by the frame relay driver for
traffic prioritization. This value is a mask value. When an IP packet is sent, the frame relay
driver checks if the packet's DSCode field (in the IP header) has any of the bits defined in
the
DS Code and sets the Discard Eligible (DE) bits to No.
Available PVCs Shows the PVCs (Permanent Virtual Circuits) available for this WAN interface.
Compression Enabled
PVCs Enter a list of PVCs on which data compression is enabled. The value can be a
comma-separated list of DLCI (Data Link Connection Identifier) numbers. You can define a
range of DLCIs by inserting a hyphen between the lower and the upper boundaries. A list
can contain individual DLCI numbers and DLCI ranges. If data compression is enabled,
compression and decompression operations are performed on the data going to and
coming from the PVCs on this list.
Access Rate Enter the maximum access rate on the interface running frame relay in kbps. The frame
relay congestion control engine uses this value to limit or shape traffic. The
Access Rate
value is determined using the T1 channels available for data communication on the port
attached to this interface and their data rates.