Canoga-perkins 9145 Network Interface Device Manual de usuario descargar pdf (Pagina 18)

9145 Network Interface Device 2-9/(2-10 Blank)

Remote Fault

If an optical port loses the receive optical signal, it sends a Remote Fault (RMTF)

signal on its Transmit to the distant end on the optical link. The Rx LED is off, and

an alarm flags the link loss on the optical port. When a optical port receives a

Remote Fault signal, the Rx LED lights red and an alarm flags the remote side

optical link failure. Both local and remote link partners must be configured to the

same RMTF enable/disable setting. RMTF complies with the IEEE802.3u Remote

Fault standard. See Figure 16.

Usr

Prt

Ext

Prt

RxTx

Usr

Prt

Ext

Prt

RxTx

RMTF

Local Device Remote Device

• Tx transmits RMTF to remote device

• Local device Rx turns OFF

• Local device Rx detects link loss

• Remote device Rx lights red

Figure

16 – Remote Fault Signal

Link Loss Forwarding

When Link Loss Forwarding (LLF) is enabled, a fault on one side of the 9145

propagates to the other side to notify that device and stops signal transmission

(brings down the link). See Figure 17. Set the LLF propagation to User to

Extension, Extension to User, or both directions. Set this in the User Interface at the

Functional Configuration screen; for details, see page 3-43.

Figure 17 – Link Loss Forwarding Propagation

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Canoga-perkins 9145 Network Interface Device Manual de usuario Pagina 18