
Configuring Frame Relay Services
3-10 117376-A Rev. A
Polling Interval
The polling interval specifies the interval between status inquiry messages that the
router transmits. Status inquiry messages cause a network response in the form of
a link integrity verification message or full status message. Successful completion
of the request/response “handshake” verifies the status of the router/frame relay
network link. We recommend that you accept the default value, 10 seconds. If the
default value does not match what the network requests, enter a value that is
appropriate for your network in the range of 5 to 30 seconds. The polling interval
does not function if you set the Mgmnt Type parameter to DLCMI None.
Full Enquiry Interval
The full enquiry interval specifies the interval between full status inquiry
messages that the router transmits. Full status inquiry messages cause the network
to send a full status report message, which lists all PVCs, PVC status (active or
inactive, and new or previously established).
The default value, 6, tells the router to send a full status inquiry every 6 polling
intervals. For example, with a polling interval of 10 and a full enquiry interval of
6, the router transmits a full status inquiry every 60 seconds; with a polling
interval of 20 and a full enquiry interval of 30, the router transmits a full status
inquiry every 10 minutes (600 seconds). The full enquiry interval does not
function if you set the Mgmnt Type parameter to DLCMI None.
Error Threshold and Monitored Events
Error threshold and monitored events together establish a criterion to evaluate the
quality of the router’s frame relay network connection. The error threshold is the
number of faulty status messages that must occur to terminate the connection.
Monitored events is the number of status message exchanges, within which
number those errors occur. For example, if you accept the default of 3 for the error
threshold, and the default of 4 for monitored events, three status exchange errors
in a sequence of four attempted exchanges brings the connection down. If you set
error threshold to 5 and monitored events to 10, five status exchange errors in a
continuous sequence of ten attempted exchanges brings the connection down.
Note: Error Threshold and Monitored Events do not function if you set
Mgmnt Type to DLCMI None.
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