I worked over the weekend to help a gold partner convert a Cabletron network over to a Cisco core. The core devices were 6513s and distribution layer was 4006 with SUPIIIs. The Cabletron equipment had a lot of built-in broadcast suppression so when we went live with the Cisco solution, we had problems with broadcast storms. The customer had a few low-end data collection devices that froze when we had a storm that hit 790 packets per second for 2 minutes. The storm was a result of an SNA device going nuts and they are tracking it down.
The CCIE that was working with me tried to implement broadcast suppression, but it seems the new SUPIII code for the 4k does not allow for specific broadcast suppression. Even if the command worked, it seems you are only allowed to suppress down to about 1% of the available bandwidth. On a Gig link, that is still way more than 790pps, so it wouldnt really help. For those of you running a production network on IOS switches, how do you limit broadcast storms? For the network we created this weekend we are going to install the low-end data collection devices in their own VLAN to eliminate outside broadcasts. Thanks for your thoughts and opinions. Jeff Reed Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=46871&t=46871 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
