One problem with the alternate ASN being prepended when receiving the routes is that other iBGP peers will drop the network prefixes as part of a routing loop detection
- Chapter 14. Advanced BGP
- from IP Routing on Cisco IOS, IOS XE, and IOS XR: An Essential Guide to Understanding and Implementing IP Routing Protocols
- Publisher: Cisco Press
- Released: December 2014
only use "neighbor local-as" causes routing-loop to iBGP peer in Real-ASN.
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