Beta Draft Confidential
10-621/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring ATM PVCs
Configuring Frame Relay-to-ATM Interworking Circuits
FCP Discard
(Fwd/Rev)
Displays only if you selected a QoS class that supports FCP
Discard. Select one of the following options:
CLP1
– (default) You can provision selective CLP1 discard for
UBR, ABR, and VBR-NRT PVCs. If the current cell causes the
queue for a PVC to exceed the discard thresholds, and the cell has
CLP set to 1, the cell is discarded. Note that EPD is not performed
in this case.
EPD
– The ATM FCP can perform EPD for UBR, ABR, and
VBR-NRT PVCs. If you select this option, then when a cell causes
the queue for a PVC to exceed the discard thresholds, the VC enters
the EPD state. The cells in the current packet of the VC are
admitted to the queue. However, when the end of the current packet
is detected, all of the cells in the next packet are discarded for that
PVC.
See “ATM FCP Discard Mechanisms” on page 5-18 for details.
Note: While the FCP Discard attribute is only applicable to a CBX
500 with an FCP, this attribute is offered as a selection on non-CBX
endpoints. This is because even though one or both endpoints may
not be on a CBX with FCP, the PVC might traverse a CBX 500 FCP
trunk. In this case, the provisioned attribute is used.
Bandwidth Priority
(0-15)
Specify a value from zero (0) through 15, where zero (0) is the
default and indicates the highest priority.
See Appendix E, “Priority Routing,” for more information.
CDV Tolerance
(1-65535)
(microsec)
(PVCs with
CBX/GX and
1-port
ATM CS DS3/E3,
1-port ATM IWU
OC-3c/STM-1,
and 12-port T1/E1
module endpoints
only)
Enter a value between 1 - 65535 µsec to define the CDVT. The
UPC uses this value to police the requested TD. A lower CDVT
value results in a more stringent enforcement of the TD, while a
larger CDVT results in a less stringent enforcement. The default is
600 µsec.
For more information, see the ATM Forum User-Network Interface
(UNI) Specification (section 3).
Reroute Balancing When the check box is selected (default), the PVC conforms to the
configured reroute tuning parameters. This means that when the
PVC reroutes during trunk failure, it will migrate back to its
original trunk at a rate and time determined by the configured
reroute tuning parameters. When the check box is cleared, the PVC
ignores the switch tuning parameters.
For more information, see the
Navis EMS-CBGX Getting
Started Guide
.
Table 10-13. Add PVC: User Preference Tab Fields (Continued)
Field Action/Description
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