06-03-2010 08:25 AM - edited 03-06-2019 11:24 AM
Hi
CISCO 3650 G 24 ports switch
%CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on GigabitEthernet0/24 (not half duplex), with Switch GigabitEthernet0/1 (half duplex)
I am getting this
my all 24 ports are setup as duplex auto but still getting this
Please help to resolve
Thanks
Asif
Solved! Go to Solution.
06-03-2010 08:28 AM
Someone has connected another switch to your 24 port switch. The two switches are not auto negotiating. If its an approved switch, it would be best to set the speed/duplex on both interfaces between the two switches.
06-03-2010 08:28 AM
Someone has connected another switch to your 24 port switch. The two switches are not auto negotiating. If its an approved switch, it would be best to set the speed/duplex on both interfaces between the two switches.
06-03-2010 08:50 AM
try hard coding duplex and speed.
06-03-2010 08:50 AM
Hola.
Cuando usas switches con puertas Giga, esta no negocian duplex: half.
Por eso cuando detectan en una de sus interfaces un equipo seteado en modo HALF DUPLEX envian un reporte de alarma.
En tu caso particular, te recomiendo tres cosas:
1.- Setea la interface Giga 0/24 en duplex full (forzado).
2.- Segun la alarma mostrada, el puerto del otro equipo es Giga. Verifica que esa interface este forzado en modo DUPLEX FULL.
3,. Verifica que el puerto Giga 0/24 de tu switch no este conectado a un HUB u otro switch (NO-CISCO) ya que de ser asi el mensaje de alarma estaria asociado a algun otro equipo conectado a ese HUB o switch (no-cisco).
Saludos.
Roger
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