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Even though you are a network admin or telecom tech, if you are not dealing with something in daily basis, you might needicon_BGP.png assist or at least chasing technical information to achieve. Probably BGP, stands for Border Gateway Protocol, is the one of them. There is tons of information about BGP on Internet. Sometimes too much stuff gives you hassle.

This article series will give you essential information to bring your BGP. Not too much technical, but one must know. If you have any questions, visit our support forum page to see any possible answer you are looking for. If not, leave your thought. Let's start with first topic "Do I need BGP?"

 

Last Updated (Wednesday, 06 January 2010 14:42)

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If you have more than two upstream ISP connections, traffic shaping would be one of major consideration for network administrator. Especially, a company has one big pipe with Tier1 ISP and mid-size connection with Tier2 ISP for redundant purpose.  Beside, those ISPs don't have any peer connection between. See below picture 1 to better understand.

BGP Tier2ISP_issue1.png

 < Picture 1 >

Last Updated (Monday, 27 July 2009 02:54)

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Cisco Single BGP with Default Route

   
  • ISPs : 1
  • WAN links : 1
  • CPE : 1
  • PE : 1
  • Device : Cisco router with LAN/WAN ports.
  • WAN / Serial IP : 12.1.3.0/30 (mask 255.255.255.252)
  • LAN / Ethernet IP : 10.1.0.0/24 (mask 255.255.255.0)
  • Receiving Route : Default route + full route from ISP
  • Memory : Full route(recommend 512M), partial route
    (recommend 128-256M)
  • LAN : ISP (AS20) and Customer (AS10)
  • Comments: If you have only single link with ISP, you don't really need BGP protocol at all. Better to use just default route to save even bandwidth. Consult with professionals if really need it. This article is shown for educational purpose.

BGP sample configuration 1-1-1

 

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Cisco Single BGP with Metric

   
  • ISPs : 1
  • WAN links : 1
  • CPE : 1
  • PE : 1
  • Device : Cisco router with LAN/WAN ports.
  • WAN / Serial IP : 12.1.3.0/30 (mask 255.255.255.252)
  • LAN / Ethernet IP : 10.1.0.0/24 (mask 255.255.255.0)
  • Receiving Route : Default route + full route from ISP
  • Memory : Full route(recommend 512M), partial route
    (recommend 128-256M)
  • LAN : ISP (AS20) and Customer (AS10)
  • Comments: If you have only single link with ISP, you don't really need BGP protocol at all. Better to use just default route to save even bandwidth. Consult with professionals if really need it. This article is shown for educational purpose.

BGP sample configuration 1-2-1

 

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Cisco Single BGP with Multi-hop (load-balancing)

   
  • ISPs : 1
  • WAN links : 2
  • CPE : 1
  • PE : 1
  • Device : Cisco router with LAN/WAN ports.
  • WAN1 / Serial IP : 12.1.3.0/30 (mask 255.255.255.252)
  • WAN2 / Serial IP : 12.1.3.4/30 (mask 255.255.255.252)

  • LAN / Ethernet IP : 10.1.0.0/24 (mask 255.255.255.0)
  • Receiving Route : Default route + full route from ISP
  • Memory : Full route(recommend 512M), partial route
    (recommend 128-256M)
  • LAN : ISP (AS20) and Customer (AS10)

 

BGP sample configuration 2-1-1

 

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