Cisco Certified Hell

As much as I like to think I know what I’m talking about, inverse ARP and FR in general were never one of my strong points. I didn’t study it much during my CCNA studies or during my CCNP studies. With that said, here’s my general explanation (simplified for my simple brain) on how inverse ARP works.

R1 has inverse ARP enabled, but R2 doesn’t.

1.  R1 –> InverseARP –> R2

2. R2: “Even thought I have inverse ARP disabled, I am still required to reply to R1′s request. AND while I’m at it, add a dynamic entry for R1.

And that folks…is my brief lesson on inverse ARP.

This entry was posted on August 4, 2009 at 6:14 pm and is filed under Layer 2 Technologies with tags For Dummies, Frame Relay. You can follow any responses to this entry through the RSS 2.0 feed You can leave a response, or trackback from your own site.