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Editing ATM and framing parameters

To view or change the ATM and framing parameters of the port:

  1. On the device view, highlight a port.
  2. Choose Edit > Port.
    3. The Port dialog box opens with the Interface tab displayed.
  3. Click the ATM tab.
    4. The ATM tab opens.
    The table below describes the items in the ATM tab.


Item Description
ifIndex
Interface Index.
MediaType
mmf (multimode fiber) or smf (single-mode fiber)
LineSpeed
For OC-3c, the operating speed is 155.52 Mb/s; for OC-12c, it is 622.08 Mb/s.
NumVpiBits
For OC-3c, 11 bits split between NumVpiBits and NumVciBits. NumVpiBits cannot exceed 6 bits for OC-3c.
For OC-12c, 13 bits split between NumVpiBits and NumVciBits. NumVpiBits cannot exceed 8 bits for OC-12c.
NumVciBits
This field is read only. It takes remaining bits from NumVpiBits. For example, if NumVpiBits is 3 for OC-3c, then NumVciBits is 8.
ScrambleEnable
Sets the port to scramble the data by clicking the box.
FramingMode
Sets the framing for the port to:
  • sonet, which means the Synchronous Optical Network format, the standard format in North America.
  • sdh, which means the Synchronous Digital Hierarchy clock format, the standard format in Europe.
ClockSource
Sets the clock source for the port to:
  • loopTimed, which means clocking is derived from the SONET line.
  • freeRunning, which means clocking is derived from the on-board clock.
Note: If you have two connected Passport 8672ATM Modules, you must set both to freeRunning or one to freeRunning and one to loopTimed; do not set both to loopTimed.
LoopBackMode
Sets the loopback mode to:
  • off
  • internal
  • external
MacAddress
MAC address assigned to a particular interface.

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