01-07-2010, 03:40 PM
I just looked this up and think I can clear up the confusion. According to Cisco Academy material:
"An EIGRP router autosummarizes routes ONLY for networks to which it is attached"
So, RT1 (no auto-summary) sends the 10.10.10.0/24 network to RT2. RT2, since it is NOT attached to 10.10.10.0 (or 10.0.0.0 for that matter) passes the classless address to RT3. It does not auto-summarize the 10.10.10.0/24 network because it is not attached to that network.
Hope that clears this up.
"An EIGRP router autosummarizes routes ONLY for networks to which it is attached"
So, RT1 (no auto-summary) sends the 10.10.10.0/24 network to RT2. RT2, since it is NOT attached to 10.10.10.0 (or 10.0.0.0 for that matter) passes the classless address to RT3. It does not auto-summarize the 10.10.10.0/24 network because it is not attached to that network.
Hope that clears this up.