Intelligent switching technology.|
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Posted by on July 12, 2005, 2:25 pm
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A couple of years ago I seem to recall reading about some switching technology that switch vendors are/were implementing to prevent switches from forwarding broadcasts out of all of their ports. Essentially the switches learn which devices are connected to which port (they have been doing this forever) and creates some kind of lookup table (port/service etc) that it uses to figure out which ports get which broadcasts. Does anyone know or remember the common name for this technology? Any links to relevant documentation would be great too. Thanks for taking the time to read my post. Frank Wells | ||||||||||||||||||||||||||||
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Posted by BradReeseCom on July 12, 2005, 2:59 pm
Please log in for more thread options Hi Frank, You may be referring to "SPAN." http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a008015c612.shtml Sincerely, Brad Reese BradReese.Com Cisco Repair Service Experts 1293 Hendersonville Road, Suite 17 Asheville, North Carolina USA 28803 Toll Free: 877-549-2680 International: 828-277-7272 Website: http://www.bradreese.com/cisco-big-iron-repair.htm | ||||||||||||||||||||||||||||
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Posted by on July 12, 2005, 3:10 pm
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Thanks for responding Brad. SPAN wasn't what I had in mind. I am referring to a technology which makes switches not act like hubs in that they no longer forward broadcasts through every port. Switches were originally designed with solving the collision domain problem and they succeeded marvelously. However, a few years later some switch wizards decided they could also solve the broadcast domain problem and thus the created the technology I am trying to explain. My apologies for not doing a better job of explaning their use in my original post. | ||||||||||||||||||||||||||||
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Posted by Gerald Krause on July 13, 2005, 12:29 am
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fwells11@hotmail.com wrote: hm, maybe you have a 'vlan' in your mind? around this technology some vendors create 'intelligent' procedures to assign dynamically clients/ports to a vlan (e.g. through inspecting arp requests and assign the port the request came in to a special vlan for a certain amount of time). -gerald | ||||||||||||||||||||||||||||
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Posted by Arnold Nipper on July 13, 2005, 12:44 am
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On 13.07.2005 00:10 fwells11@hotmail.com wrote > Thanks for responding Brad. SPAN wasn't what I had in mind. I am
> referring to a technology which makes switches not act like hubs in > that they no longer forward broadcasts through every port. > > Switches were originally designed with solving the collision domain > problem and they succeeded marvelously. However, a few years later > some switch wizards decided they could also solve the broadcast domain > problem and thus the created the technology I am trying to explain. > > My apologies for not doing a better job of explaning their use in my > original post. > Maybe you are thinking of Vlans? With Vlans the switch only broadcasts to every port in the Vlan. Arnold -- Arnold Nipper, AN45 | ||||||||||||||||||||||||||||
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> referring to a technology which makes switches not act like hubs in
> that they no longer forward broad casts through every port.
>
> Switches were originally designed with solving the collision domain
> problem and they succeeded marvelously. However, a few years later
> some switch wizards decided they could also solve the broadcast dain
> problem and thus the created the technology I am trying to explain.
>
> My apologies for not doing a better job of explaning their use in my
> original post.