حياك الله اخوي نزار
اولا اشكرك على مداخلتك في الموضوع و سؤالك المهم جدا !! بخصوص كيف يعمل الـ ODR مع Non Cisco Spokes
و اجابة السؤال من سيسكو كتالي Q. Can I run ODR in a multivendor situation?
Yes, you can run ODR in a multivendor situation. The non-Cisco router must be used as a spoke. Since the hub router runs ODR, it does not receive any information about the non-Cisco routers that act as spokes. For this reason, Cisco recommends you use a standard routing protocol such as RIP or OSPF between the non-Cisco spokes and the hub. The hub router can still run ODR when rest of the spoke routers are Cisco routers. For more information, refer to the Designing Large-Scale Stub Networks with ODR