On Fri, Jun 03, 2016 at 12:27:29PM +0100, Tom Bird wrote: > On 03/06/16 10:26, Job Snijders wrote: > > Here are JunOS, IOS XR & BIRD examples: > > > > http://as2914.net/bogon_asns/configuration_examples.txt > > > > With your permission I'd like to add the IOS flavor > > Did we not establish some time ago that running these crazy regexes on > a full table was a really bad idea, particularly on CPU constrained > old IOS boxes?
I've added a warning that the IOS snippet might not be suitable for all gear. I've been testing the IOS example on a ISR4431/K9 and I can't really measure a difference in timing between flapping a full table session with and without the filter. But, aside from the possible CPU penalty, the major drawback of the IOS flavor is that its unreadable garbage which is hard to debug. Truth be told, I'd be hesitant to deploy this on IOS devices. Kind regards, Job
