802.1Q frame has a 12 Bits VLAN ID which translate to maximum possible 4096 vlans on a trunk.
ISL frame has a 15 Bits VLAN ID. based on this I would assumed ISL can support more than 4096 vlans. however, I'm being told only up to 1024 vlans are supported on a ISL trunk. is this true? if so, is there something in the ISL frame I can use to calculate the max vlan?
I read that both ISL and 802.1Q support 4094 vlans. What you see as allowed VLAN is configured with a command: "switchport trunk allowed vlan [add|all|except|remove] vlan-list" ..... So one thing is the number of VLANs it supports and a different thing is the number of VLANs allowed in a trunk. Hope this helps.
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.