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Hello qi guo,
Refer the CISCO VALIDATED DESIGN document as below:-
Intelligent WAN and WAN Design Summary and also
http://www.cisco.com/c/dam/en/us/td/docs/solutions/CVD/Oct2016/CVD-IWANDesign-2016OCT.pdf
Intelligent WAN Deployment Guide
http://...
Hello Dong,
Check the output of show tcp brief on all router.
if you are using source as loopback 0 each routers in the domain should be reachable via loopback of each other.
check output of "show eigrp service-family ipv4 neighbours.
Like gpauwen ...
