My network is 10/100 and have devices with NIC 10/100 and others with NIC 10, someone told me that when you have some device with 10 MBps with others with 10/100 in the same network all must be configured to half duplex, that is right ?
No that is incorrect. You can have ports setup for both. Currently we are running a 100 meg but most printers only run at 10 meg. So we setup the full and half duplex accordingly. Something else you may want to think about that some poeple don't know is that if you have ports on the switch or on the PC's setup as Auto detect they only detect at half duplex regardless if the port /NIC on the other side is setup as 100 full. You may want to look into that as well if you are having speed issues. We went from 34 meg per minute to over 300 meg per minute by just changing that setting. Wes
That is one of the reasons people went to switches versus hubs which were generally a single speed , everyone now has their own pipe instead of sharing one and it can be 10 or 100 whatever you want to configure it for
duplex mismatch is only a problem in situations where the end devices are contending for access in the same collision domain e.g in a hub. In these situations half duplex is used with CSMA/CD media access, which actively looks out for lan collisions before transmitting. Full duplex mode disables CSMA/CD therefore if a half duplex and a fullduplex device were plugged in to a hub, collisions would occur as the full duplex device is not listening for other devices before it transmits. Switches, however act as a multiport bridge in that each port defines its own collision domain and is totally separate to other devices plugged into a switch. The only problem here would be a duplex mismatch between the switch port and the end device plugged into it, generally in these situations you would use full duplex (if the device supports it) as this increases the bandwidth available to the end user.
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.