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4-46 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring ATM Logical Ports on Frame-based Modules
Defining ATM Network Interworking for Frame Relay NNI Logical Ports
Max Full Status
Attempts
(
1-port
ATM IWU
OC-3c/STM-1
and 1-port ATM
CS DS3/E3
modules)
The number of RLMI full status inquiry attempts used to bring up the
working interface. The default is 3 attempts. Enter a value greater
than zero (0).
See Chapter 15 for more information about RLMI.
Note: Changing the value for this attribute does not admin down the
logical port.
LMI Update
Delay
Set a timer from 1 to 9 seconds to enable asynchronous LMI updates.
The default is 3 seconds.
When you set this timer, the switch sends a signal (known as an event)
to notify other CPEs when a circuit on this logical port goes up or
down. The specified time interval creates a buffer. If the circuit
recovers within this period of time, no event is issued.
• If you choose No Updates, the switch does not send a signal to the
CPE.
• If you choose No Delay, the switch sends an update immediately
to the CPE.
For example, if the network takes a significant amount of time to
recover from trunk outages, increase the LMI update delay. This delay
minimizes network downtime visibility to end-users.
Note: Changing the value for this attribute does not admin down the
logical port.
DTE Poll Interval
(sec): (5-30):
Specify the number of seconds between the transmission of status
inquiry messages (T391). Set the DTE poll interval to a value that is
less than the DCE poll verify timer on the attached device. (This value
must be greater than 1/2 the value of the DCE poll verify timer.) The
default is 180 seconds for one-to-one mapping.
DTE Error
Threshold: (1-10):
Specify an error threshold (N392). This parameter is used with the
DTE Events Count (N393) parameter. The Local Management
protocol monitors the specified number of events for the DTE Event
Count. If the number of events found in error exceeds the specified
DTE Error Threshold, the link is declared inactive. The default value
is 3.
DTE Event Count:
(1-10):
Specify the number of events in a sliding window of events monitored
by the network. The default is 4. An event is the receipt of a valid or
invalid status message or expiration of the T391 timer.
For example, use the default DTE Error Threshold value of 3 and the
default DTE Event Count value of 4. If three (N392) of the last four
(N393) events are bad, the link is declared inactive. The link remains
inactive until the network receives four consecutive error-free events.
Table 4-18. Add Logical Port: Link Management Tab Fields (Continued)
Field Action/Description
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