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What is the difference between local fault and remote fault in the port link down messages

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TitleWhat is the difference between local fault and remote fault in the port link down messages
Question
What is the meaning of remote fault and local fault during the link down messages
 
<Info:vlan.msgs.portLinkStateDown> Port <port#> link down - Local fault
 
<Info:vlan.msgs.portLinkStateDown> Port <port#> link down - remote fault



 
Environment
  • Exos All
  • Summit and BlackDiamond series
Answer
Fault Operation
1) Device B detects loss of signal. Local fault is signaled by PHY of Device B to Device B.
2) Device B ceases transmission of MAC frames and transmits remote fault to Device A.
3) Device A receives remote fault from Device B.
4) Device A stops sending frames, continuously generates Idle.


The Extreme Networks implementation of LFS conforms to the IEEE standard 802.3ae-2002.

For more information please refer to IEEE standard 802.3ae-2002


A local fault is usually caused by a lack of light being received.
No light coming from the other end of the connection can mean the other end is not plugged in or the physical fiber connection is misaligned or dirty.
Additional notes
Local fault = Other side of the link reported a issue on it's side.  Remote fault = other side of the link reported a issue with this side of the link.

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