Got it

The BGP neighbor status is Active.

Latest reply: Dec 27, 2018 07:59:47 1711 3 10 0 0

The following figure shows the output information of a router.


The most possible cause of the problem that the neighbor relationship between the router and the neighbor 10.1.1.1 is in the Active state.


143754v62x0k34tcx20wd0.png


May be caused by TCP port 179 being disabled.

Because BGP TCP connection uses port 179

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Amr_Fayrouz_Elattar
Created Dec 27, 2018 06:51:56

TCP connection is initiated and it is in ACTIVE state i.e. LISTENING state.It is waiting for the TCP connection to complete.

Peer address configured incorrectly on either router.

AS number configured incorrectly on either router.

BGP configuration error.

Network congestion.

Interface flapping.
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user_2915719
Created Dec 27, 2018 07:51:09

No peer connection is made, need to check the connection and configurations of this router.
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yiyi0519
Created Dec 27, 2018 07:59:47

BGP-4 provides a new set of mechanisms to support classless interdomain routing. These mechanisms include the concept of supporting network prefix advertisements and the elimination of "classes" in BGP networks. BGP-4 also introduces mechanisms to support route aggregation, including collections of AS paths. These changes provide support for the proposed supernet solution. BGP-4 uses the route vector routing protocol. When configuring BGP, the administrator of each autonomous system should select at least one router as the "BGP spokesperson" of the autonomous system.
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