A fine point, probably not what was originally meant but worth mentioning. While a switch cannot and should not prevent broadcasts, it can help limit broadcast storms with port-level broadcast rate limiting.
Used in conjunction with a router and CGMP, a switch can reduce the level of irrelevant multicasts to a given port, if that's an issue. Yes, I know broadcasts are a special case of multicast. But they are rather like Groucho Marx's opinion "I wouldn't join any club that would have me as a member." Broadcasts just don't have any exclusivity, my deah, don't you know. But that does bring up the issue, not a common one but still to be considered, if there are unusual sources of broadcasts, and if they possibly can be converted to multicasts. For some reason, there are a fair number of healthcare applications that broadcast when they could multicast. Real-time financial applications like stock quotes are much better. Bloomberg financial news, for example, uses a huge multicast network to its subscribers. >1 24 port hub hanging off of a switch port will be in it's own collision >domain...and will not be that bad at all. Broadcasts however will not >change... all f's get forwarded through every port on a switch or a hub. > >-Patrick > >>>> "Juan Blanco" 03/07/02 11:33PM >>> >Actually what we are trying to do is increase speed, eliminate collisions >and reduce any kind of broadcasting in the LAN.... > >-----Original Message----- >From: Patrick Ramsey [mailto:[EMAIL PROTECTED]] >Sent: Thursday, March 07, 2002 11:19 PM >To: [EMAIL PROTECTED]; [EMAIL PROTECTED] >Subject: Re: Infrastructure Upgrade..... [7:37627] > > >Well, > >You did pick a pretty expensive switch to purchase...hehe > >the 1900's are 10mb to the desktop... You'll see some improvement over 10mb >hubs on the lan but across the frame connection, it's really irrelevant. >Are you looking to increase lan speed? > >In this day in age, I never reccommend hubs...but if you are really tight on >cash flow, you would probably do better to purchase a 12 port 100mb switch >and 8 100mb hubs. > >-Patrick > >>>> "Juan Blanco" 03/07/02 10:27PM >>> >Team, > >I am in the process of upgrading all hubs in 4 different sites, each site >has 8 hubs, I will replace each site with a 2950(24 ports)10/100mbs. I will >connect each switch(2,3,4) to the switch(1) on the basement where a router >will be available to connect to the Frame Relay cloud. > >Questions: > > Will it make more sense to get the 1900 switch(10mbs) and not the 2950 > Will I be able to set any one port to full(100mbs) on the 2950 > Will I be able to set up vlans and isl (as long as my route has a >fastethernet port) > Is this the appropriate replacements for the hubs(we don't >have a lot of >money to spend) >Thanks, > > >JB >>>>>>>>>>>>>> Confidentiality Disclaimer >>>>>>>>>>>> Confidentiality >Disclaimer This email and any files transmitted with it may contain confidential and >/or proprietary information in the possession of WellStar Health System, >Inc. ("WellStar") and is intended only for the individual or entity to whom >addressed. This email may contain information that is held to be >privileged, confidential and exempt from disclosure under applicable law. If >the reader of this message is not the intended recipient, you are hereby >notified that any unauthorized access, dissemination, distribution or >copying of any information from this email is strictly prohibited, and may >subject you to criminal and/or civil liability. If you have received this >email in error, please notify the sender by reply email and then delete this >email and its attachments from your computer. Thank you. > >================================================================ Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=37795&t=37627 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
