Shortcomings to customers
- Running and tuning BGP requires significant knowledge and experience as well as continued monitoring and adjustments
- BGP without knowledgeable tuning quickly leads to unintended asymmetric traffic patterns through the upstream ISP’s
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- Unqualified modification on BGP router quickly leads to disconnection from the global Internet because of missing route announcements or route flap dampening
- Misconfiguration of the routing table entries quickly lead to bogus route announcements (like a full /8 or multiple /24 instead of an aggregate) and can cause serious traffic interruptions(hello Teleglobe Europe!)
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- ISP’s have to employ very strict filters towards their multi-homed customers because of these frequent problems
- These filters in turn decrease flexibility and increase complexity while representing a significant source of errors in themselves.