Hi! The Router on which you perform the redistribution and changed the AD for EIGRP External Routes is the same one right? If you look at the Router which is performing the Redistribution itself: It shouln't affect the Routing Table on this Router itself. It will only announce the redistributed Routes as external routes in the given routing protocol. So if you perform the change you made - changing AD for EIGRP External Routes: This will only affect external Routes which are learnt over EIGRP. Not routes the Router redistributed himself. That explains the behavior you are seeing. The router will stick with the routes he has learned via OSPF, because he is redistributing them himself. Hope that helps. Let me know what you think. Best regards Julian ... View more

Hi! Do you have access to the device behind the IP  192.168.1.1? Can we check the routes on this device? It may does not have any routes to get back to the Cat3750. Let me know. Best regards Julian   ... View more

Hi! I also don't think you need to use QinQ at all. Did somebody from ISP or Azure side tell you that you will need to use it? If not, I think you can just see the link between your Cat9k and Azure as a transit link in VLAN 4001. You shouldn't have to care about what the ISP is doing. For you it should appear like a cable going from the Cat9k to the Azure Cloud :) Tell me what you think. Best regards Julian ... View more