Page Comparison

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BGP Protocol	TCP / 179	https://en.wikipedia.org/wiki/Border_Gateway_Protocol
BGP Messages:	Open Msg Notification Msg Open Keep Alive Update Message	https://ipcisco.com/bgp-part-2/
BGP Attribute:	Well Known/ WK: Mandatory: Origin , AS-Path , Next-Hop Discretionary: Local-pref Optional: Transitive: Community , Aggr None-Transitive: MED, Origin-ID , Cluster list RR: Originator ID, Cluster List ( Cluster ID )
BGP State:	Idle Connected Active Opensent Openconfirm Establish
BGP Features	path Selection add-paths fast reroute
BGP advert rules	iBGP to iBGP : NOK Split Horizon ( uless unless Route Reflection by a RR ) eBGP to iBGP, eBGP to eBGP and iBGP to eBGP: OK
AS manipulation	remove private AS: remove-private company buy another one, old company change AS : local-as 1 old company change AS but not advertised : local-as 1 private

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