I have inherited a wiring closet for an office with four Cisco Catalyst 2948G-GE-TX switches handling all the patches from the user office ports.
This model supports 1000BASE-T on all 48 ports, and has four SFP ports (currently empty of transceivers.) I am about to re-wire the entire closet, as it is a spaghetti monster.
So I have a PIX, two routers, and the four switches in there. Right now, the wiring is all Cat5/Cat5e, and no SFP ports are in use. Is there any advantage to using the SFP ports to connect my switches together?
Normally, the primary advantage would be the Gig-E speed, but all 48 ports have 1000BASE-T. (Also, the SFP ports allow links to be hundreds or thousands of meters away - but I'm all in the same rack, so copper is fine.)
I'm unsure whether the Cisco switches would perform better using the SFP ports because of optimization in administrative overhead between the switches, whether some sort of trunking should be configured, etc.
Also, if using the SFP ports IS recommended, what's the best configuration - a master switch with three branches to the others? And given a tree like that, is there benfit to also cross-linking the branches for machine-to-machine communications?
I wouldn't mind cross-linking all four switches together if there's a speed benefit, but I doubt it would be much - if any - and looking at 4 x 4 = 16 transceivers at $300 a pop starts to add up.
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.