Allied Telesis AT-S102 - Manual (Page 53)

Converteon Management Software User’s Guide
53
of the transmitter on a port and the constantly changing state of a link
could prove problematic for some managed devices. For example, the
device might send a constant stream of SNMP traps or, if the device is
running a spanning tree protocol, the protocol might become confused as
the status of the device’s link to the media converter constantly changes.
Smart
MissingLink and
OAM Visible
OAM
This mode is supported on the AT-CM3 Line Cards. It is not supported on
the AT-CM2, AT-CM70S, and AT-CV Line Cards.
The only difference between this mode and the Smart Missing Link mode
is the addition of support for the OAM-based features on the fiber optic
port of the line card. You might choose this mode if your network would
benefit from the operating characteristics of the Smart MissingLink mode
and if the fiber optic port is connected to an OAM-compatible device, such
as another Converteon line card.
Even though the OAM-based features are present only on the fiber optic
port, in this operating mode they are dependent on the state of the twisted
pair port, just as in the MissingLink and OAM visible mode. For OAM to
work, there have to be links on both ports, not just the fiber optic port, on
the line card. For more information, refer to “MissingLink and OAM Visible
Mode” on page 51. If you want the availability of the OAM-based features
to be independent of the state of the twisted pair port on the line card, use
the Link Test with OAM mode.
OAM Visible
Mode
This operating mode is supported on the AT-CM2 and AT-CM70S Line
Cards. Use this mode to add support for the OAM-based features on the
fiber optic ports of these line cards
When a line card is set to this operating mode, the Link LEDs for the ports
operate the same as in the Link Test mode. A port’s Link LED will be on
when the port has a link to a network device and it will be off when the port
does not have a link.
As with the other operating modes, this mode does not interfere with the
forwarding of network packets and so can be used by a line card during
normal network operations.
OAM Bypass
Mode
This operating mode is supported on the AT-CM2 and AT-CM70S Line
Cards. A line card set to this mode ignores the OAMPDUs received on its
fiber optic port and forwards the packets as normal network traffic.
For all intents and purposes, this operating mode is identical to the Link
Test mode. Even the ports’ Link LEDs operate the same.
Note
This mode does not support the OAM-based features.