Thanks for the info. What will they think of next? ;-) You better have big pipes between those switches. I love the way Cisco gives you enough rope to hang yourself. I was glad to see that they don't let you SPAN BPDUs. You could really screw things up that way! ;-)
Priscilla At 05:37 PM 4/8/02, Kent Hundley wrote: >Priscilla is correct, normally a span only shows unicast for the VLAN on the >switch where the span is enabled plus any bcast or mcast from other switches >that have active ports in the VLAN in question. However, there is a "remote >span" capability that has been added to the 6000 series in 5.3 code that >does allow you to see the traffic for an entire vlan from any switch in the >net: > >http://www.cisco.com/warp/public/473/41.html#remote > >Regards, >Kent > > >-----Original Message----- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of >Priscilla Oppenheimer >Sent: Monday, April 08, 2002 10:06 AM >To: [EMAIL PROTECTED] >Subject: RE: port mirroring and vlans [7:40816] > > >At 12:15 PM 4/8/02, Michael Williams wrote: > >AFAIK, if you have to two switches connected via a trunk link and you >mirror > >VLAN1 to a port, you should see all of the traffic in VLAN1 (i.e. from all > >switches involved in that VLAN). > >Only traffic that actually crosses the mirrored port, though, right? >Broadcast /multicast traffic for the VLAN as well as traffic directed to >ports on the switch doing mirroring that are in VLAN 1. > >I got the impression he thought he was going to see traffic on other >switches that happened to have ports in VLAN 1 too. I doubt that's true. >Think of all the extra work you would be requiring of the switches. > >Priscilla > > > You'll probably run into a situation where > >all of the traffic in VLAN1 will overrun your mirror port (which on a busy > >switch isn't hard to do). We have two 5500s trunked together, and we span > >(mirror) a port on a VLAN quite frequently. > > > >Mike W. >________________________ > >Priscilla Oppenheimer >http://www.priscilla.com ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=40873&t=40816 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
