Ive been reading a number of articles, some says you need to put bpdufilter on access ports, some says you need to put bpduguard on access ports.
The commands almost seem to serve opposite purposes - one shuts the port down if a bpdu is detected, the other obstensibly ignores bpdus. Which one of these commands takes precendence?
Which one do I use for accessport and which one do I use for trunk port?
The other day I tried bpdu guard on both side of the trunk, the ports immediately went to err-disable mode.
You absolutely don't want BPDUGuard on trunk links because usually trunk links connect up 2 switches and you want them to receive and send BPDUs. BPDUGuard should be enabled on ports that you do not want to receive BPDUs on ie. you can use BPDUGuard an apply to all ports connecting to end devices such as PCs/servers etc. That way if someone connected a switch or created a loop with a hub the port would see BPDUs and disable it. BPDUGuard is the more commonly used.
BPDUFilter is less commonly used. In effect it turns off STP on that port.
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.