Allied Telesis AT-MMC200/LC, Installation Manual

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MMC2000/200 Series Mini Switching Media Converter Installation Guide
29
V2 Series Media Converters
The MMC2000/200 V2 series media converters have the SML feature to
pass the link status from one port to the other for endpoints, make a
connection problem visible, and help identify where troubleshooting is
required.
Note
For the V3 series media converter, see “V3 Series Media
Converters” on page 30.
Note
To find out whether your device is V2 or V3, see “Differences
Between V2 and V3” on page 28.
Guidelines for the
SML Mode for
V2
Here are guidelines for the SML mode:

The MMC2000/200 V2 series media converter is set to either the
SML mode on or off.

Use the DIP switch to select ON or OFF.

When two media converters are connected in pairs, turn the SML
mode on. See “Media Converters in Pairs in SML Mode” on
page 33.

The SML feature of fiber link communication on a link failure can
cause problems with some switches when the fiber port is directly
connected to a switch. The SML mode is intended when the fiber
port is connected to another Allied Telesis media converter.
Example
Scenarios in SML
Mode
The following example scenarios explain how the V2 series media
converter behaves with SML on and SML off:

“Media Converter with SML Off” on page 31

“Standalone Media Converter in SML Mode” on page 32

“Media Converters in Pairs in SML Mode” on page 33