I have recently upgraded a LAN from 2950s to 3750s. Sitting off the 3750s are several 3-com hubs as well as user PCs directly attached. Previously the hubs were connected solely to the 2950s.
The 3750s are reporting the following error frequently:
*Mar 8 11:17:37: %ETHCNTR-3-HALF_DUX_COLLISION_EXCEED_THRESHOLD: Collisions at
FastEthernet1/0/10 exceed threshold. Considered as loop-back.
The 3750 switchports that connect the 3-com hubs are reporting excessive collisions and shutting the port down (err-disable). There is a workaround, but this takes at least 30secs to kick in and reset the port - impacting users:
errdisable recovery cause loopback
errdisable recovery interval 30
The 3750 ports are configured as 10m half duplex for all 3-com port connections, yet still report excessive collisions. This error was not previously seen with the older 2950 switches. Is this a bug or known issue? Is there a better workaround than waiting 30secs each time for the automatic port reset?
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.