Monthly Archives: March 2014

EIGRP Route Filtering with ACLs

There are a number of reasons to implement route filtering. The filters can be used to control what routes are sent as well as what routes are learned from a neighbor. With ACLs the configuration is very flexible so just about anything is possible! Continue reading

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IPv6 Access List Basics

Chances are that if you have worked with IPv4 on the IOS platform for any length of time you are familiar with the access list formats, both standard and extended.  Assuming you know at least the basics of the addressing structure you should have no issue establishing similar ACLs for IPv6. Creating IPv6 ACLs The first considerations are that IPv6 ACLs have to be the “extended” format meaning the both the source and destinations have to be defined.  The ACLs also have to be named with a string as numbered ACLs are not acceptable.  The ACL name can contain numbers … Continue reading

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