Beta Draft Confidential
Configuring SVC Parameters
Configuring SVC Attributes
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000 1/19/0517-5
• When configuring NNI or virtual NNI logical ports on GX 550 BIO2 modules,
you should only enable Frame Discard if the traffic traversing the NNI or virtual
NNI port is encapsulated using ATM Adaptation Layer 5 (AAL-5). If Frame
Discard is enabled on an NNI or virtual NNI port that is not using AAL-5
encapsulation, all traffic traversing the NNI or virtual NNI port may be discarded.
Select the General tab from the Configure SVC dialog box and complete the fields as
described in Table 17-1.
Table 17-1. Configure SVC: General Tab Fields
Field Action/Description
Parameters
Hold Down Timer
(0-255 sec)
Enter the number of seconds (0 – 255) to wait before the network
initiates SVC clearing when a trunk has gone down. If you enter zero
(0), the network clears the SVC immediately upon detection of a
trunk outage.
Note: Modifying the value of this attribute does not admin down the
logical port.
Failure Trap
Threshold
(0-65535)
Enter the threshold crossing alarm value for SVC failure traps (0 –
65535). The switch generates a trap if the internal SVC failure
counter crosses this threshold during the current 15-minute time
period. The internal counter is reset every 15 minutes.
The default value of 1 means that if one SVC failure occurs on a
logical port, a trap is issued and no additional traps are issued until
the next 15-minute period. If you change the threshold value to 100,
it means that 100 SVC failures must occur in a 15-minute window in
order to trigger a trap. If you enter zero (0) the switch never
generates a failure trap.
Load Balance
Eligibility
(0-65535 sec)
Enter the number of seconds an SVC must be established before it is
eligible for load balance rerouting (0 – 65535). The default is 3600
seconds. This feature is useful for those SVCs that are long term and
may encounter a forced reroute due to trunk failure.
Max. Simultaneous
SVCs
(0-16777215)
The No Limits check box is selected by default. To specify the
maximum number of SVCs allowed on the logical port, clear the No
Limits check box and enter a value between 0-16777215 in the value
column. Originating and terminating SVCs are summed for this
purpose. Each point-to-multipoint (PMP) SVC is counted as one
SVC, no matter how many leaves it might have.
To specify no limit, select the check box in the No Limits column.
Max. PMP SVCs
(0-16777215)
The No Limits check box is selected by default. To specify the
maximum number of PMP SVCs allowed on the logical port, clear
the No Limits check box and enter a value between 0-16777215 in
the value column. Only root SVCs are summed for this purpose.
To specify no limit, select the check box in the No Limits column.
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