multiple VLANs assigned to a server/workstation port
Yes this subject has been raised before - many times. But Dell's PowerConnect switches seem to contradict what so many have said is not possible, that one server/workstation can communicate with multiple VLANs using a non 802.1Q compliant NIC nor operating system - using an *untagged* port on their switch. and no L3 routing.
does this not contradict what I have read so many times in this forum and CISCO documentation? (Cisco allows multiple VLANs on a tagged port, for communications with an 802.1Q compliant switch, router or NIC.) Maybe this is a Dell only 'feature'? It seems that this 'feature', while not part of 802.1Q rfc, is what many companies want. though i don't want a dell switch.
Re: multiple VLANs assigned to a server/workstation port
I've never heard anyone say that multiple untagged VLANs on a port isn't possible. It's extremely uncommon in the world of Cisco because Cisco hasn't implemented some features that are frequently seen from other vendors, but it's certainly possible via a number of methods.
The easiest way is just to treat a port as if it's always in multiple VLANs; i.e., allow all member VLANs to send traffic to the port and allow hosts on the port to send traffic to all member VLANs. So on a per-packet basis there's no VLAN classification: each packet is treated as if it's potentially a member of any member VLAN.
Other ways include classifying traffic into a VLAN based on identifiers other than VLAN tags, such as layer-2 or layer-3 addresses. For example, a packet entering a port which is a member of multiple VLANs can be dynamically assigned to the appropriate VLAN based on it's source MAC or IP address.
So there are a lot of options, and I don't why Cisco has yet to implement any of these (sometimes useful but usually ugly) features.
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.