I want to filter all prefixes that have private ASNs in their AS path and I want to achive this via an ip as-path access-list. (neighbor x.x.x.x remove-private-as isn't an option)
What would a regexp have to look like that filters all ASNs from 64512-65535 ?
Solved! Go to Solution.
Thank you very much for your reply, it's the right approach - it's just missing the range from 64512-64599.
I found this here:
ip as-path access-list 150 permit _(6451[2-9]|645[2-9][0-9]|64[6-9][0-9][0-9])_
ip as-path access-list 150 permit _(65[0-4][0-9][0-9]|655[0-2][0-9]|6553[0-5])_