At 02:44 PM 2/20/02, Steve Smith wrote: >Hey gang this is a little OT but hear me out. I have notice, through >port scanning, that our new servers run protocol 17 "Quote of the Day" >with different little quotes on each one. What impact does or can this >have on a network. We are talking 30-40 servers?
A nit-picky thing about your terminology first: IP protocol 17 is actually UDP (0x11 in hex). TCP is protocol 0x06. The TCP port number 17 is "quote of the day." Even with 30 to 40 servers sending quotes, this probably uses a very small amount of bandwidth. To know for sure you would have to know how often they send the quotes. But even if they send rather often, it's probably still a small amount of bandwidth. I'm assuming they don't send every millisecond or something silly like that. Where are they sending the quotes? Are they broadcasts? Broadcasts don't use any more bandwidth, but as you know, they can cause performance problems at the recipients because they interrupt the CPUs. But, once again, if it's infrequent, this isn't a big deal. Are the servers on a shared network? Probably not. But if they are on a shared Ethernet, for example, there might be a minor concern that they cause unnecessary collisions with more important packets. But this is probably somewhat rare and not a big deal. Finally, consider the servers themselves. Do you have any tools to monitor how much memory, hard disk space, and CPU power sending quotes uses? Probably not much, but I'm just mentioning all the performance considerations I can think of in order to turn this into a "learning moment." ;-) Unless there's a reason for the quotes, you could turn them off. My guess is that they aren't causing any problem, however. Is it where you got your cool quote below? I like it. If your users like the quotes, I would say, don't worry about their usage of network resources. But do some more research first on the details of how the quotes are sent before taking my word. Priscilla >Thanks! > >Steve Smith MCSE, CCNA, CCDA >Data Networks Technical Manager >Freeliant Inc. >[EMAIL PROTECTED] > >The brave may not live forever, but the cautious never live. ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=35984&t=35969 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
