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DMVPN Phase 2 Spoke Summarization

Hello!

I'm currently going over the benefits of migrating from phase 2 to phase 3 for our DMVPN network. One of the issues with phase 2 is doing summarization at the hub for the other spoke networks. Currently, the spokes are summarizing their own networks via EIGRP to the hub and the hub is then re-advertising this summary route to the remaining spokes. In phase 3, I will do all of the summarizing at the hub, but I'm not seeing that as a huge benefit compared to the spokes doing it.

Are there any issues with doing the summarization at the spokes in phase 2? What are the benefit of having the hub do summarization in phase 2 compared to the spokes doing summarization in phase 2? To me, it looks like its accomplishing the same goal. I feel like there is something that I'm not realizing here.

Thanks for any answers in advance!

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