BGP (Border Gateway Protocol)

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• TYPE 1: OPEN
• TYPE 2: KEEPALIVE
• TYPE 3: UPDATE
• TYPE 4: NOTIFICATION

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• BGP VERSION NUMBER
• AS NUMBER
• BGP IDENTIFIER
• OPTIONAL PARAMETER

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• NETWORK-LAYER REACHABILITY INFORMATION (NLRI)
• PATH ATTRIBUTES
• WITHDRAWN ROUTES

10. NETWORK-LAYER REACHABILITY INFORMATION (NLRI)
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PATH ATTRIBUTES
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WITHDRAWN ROUTES
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1.
LARGEST WEIGHT
LARGEST LOCAL
PREFERENCE.

13. PATH THAT WAS ORIGINATED BY BGP
SHORTEST AS_PATH.
LOWEST ORIGIN
LOWEST MED ATTRIBUTE
EXTERNAL PATH
CLOSEST IGP NEIGHBOR
ROUTER ID

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15. R1 with BORDER_1
and R2 with
BORDER_2
are IBGP neighbors
while BORDER_1 with
BORDER_2 are EBGP
neighbors (because
they belong to
different AS).

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• EXTERNAL LINK
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• INTERNAL LINK
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26. https://www.facebook.com/N
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