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. WIKIMERIONET
Merion Mertics , ,

CRM

4

BGP (Border Gateway Protocol). ? BGP .

, :

  1. BGP
  2. BGP
  3. BGP

BGP, - AS(Autonomus System). - , , , .

AS ( 32 ) ASN (Autonomus System Number) IP-. IANA (Internet Assigned Numbers Authority), ASN , .

.

. . , 10 .

, , , .

, :

  1. AS
    • IGP (Interior Gateway Protocol) . : RIP, OSPF, EIGRP, IS-IS
    • EGP (Exterior Gateway Protocol) . BGP
    • Distance-Vector - . (RIP, EIGRP)
    • Link State (OSPF, IS-IS)

BGP Link State . , .

, BGP , AS. :

 BGP

BGP , . , , BGP- TCP 179 , SYN ACK.

BGP , . , , AS402 BGP BR2 (Border Router), BR1 ASN, AS401 , TCP- . , :

  1. 179 ACL (Access Control List)
  2. BGP ASN
  3. RouterID

TCP- , BGP-

OPEN, ASN, RouterID Hold timer. Hold timer , TCP-. , , , AS, NOTIFICATION , ASN TCP-.

, , , KEEPALIVE, , OPEN .

, UPDATE. :

  1. Path Attributes ( ). AS , Next Hop .
  2. NRLI (Network Layer Reachability Information). , , . IP- .

UPDATE , , KEEPALIVE TCP-.

. , BGP , .