Solved: Confusing ACL

Gary Jeffers · ‎02-20-2010

I came across this ACL command during the course of my studies and didn't understand it. Up until I saw this I hadn't seen anything above the multicast range be used as the destination address in an ACL. What traffic would this identify? How would this affect an inbound distribute list?

access-list 101 permit ip 10.10.0.0 0.0.0.0 255.255.224.0 0.0.0.0

Thanks

Edison Ortiz · ‎02-20-2010

That's for filtering a supernet 10.10.0.0/19

Much easier to write it as a prefix list

Please refer to this article for more info:

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00801310cb.shtml#acclists

View solution in original post

Edison Ortiz · ‎02-20-2010

That's for filtering a supernet 10.10.0.0/19

Much easier to write it as a prefix list

Please refer to this article for more info:

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00801310cb.shtml#acclists

Gary Jeffers · ‎02-20-2010

So something like

ip prefix-list PFX_TEST permit 10.10.0.0/19

would do the same thing?

Edison Ortiz · ‎02-20-2010

Yes

Gary Jeffers · ‎02-20-2010

Thanks Edison