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Load Balancing using eBGP

Do the 2 links should same bandwidth?

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Load Balancing using eBGP

Henry

When using BGP there is no requirement to have equal bandwidth for load balancing.

BGP metrics, and BGP route determination do not have any thing that checks on bandwidth.

HTH

Rick

Rising star

Load Balancing using eBGP

BGP RIB and IGP RIB are completely different Henry. IGP's such as RIP, EIGRP, OSPF, all have specific metrics and algorithms you can modify to tune it to your liking or leave it at the default. EIGRP has Bandwidth and delay by default, and OSPF has cost. BGP, left to it's default, makes RIB decisions based on shortest AS-Path. If you have multiple entries with the same AS-Path you can start manipulating various other parameters such as Weight (Cisco only), Local Preference, MED values, etc etc.

Are you load-balancing via eBGP with the same ISP or different ISPs?

Load Balancing using eBGP

MED can be used only if the ISP's support it hey!

I would still stick with local pref only if Henry has two ISP's and wants to load balance outbound traffic..

Rising star

Load Balancing using eBGP

Simple answer is NO.

If you want to know more about load balancing/sharing  in BGP then please see below links.

http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a00800945bf.shtml

http://stack.nil.com/ipcorner/LoadBalancingBGP/

HTH

Kishore

Rising star

Load Balancing using eBGP

Henry, are you talking about inbound or outbound load balancing and or both?

Load Balancing using eBGP

was just thinking about this one a while back... we could use IPSLA to force the BGP path to be different if one of the links is over loaded.. IPSLA parameters could be that the latency or even rtt..

Beginner

Re: Load Balancing using eBGP

No, they can be on entirely different bandwidth. May be one used for primary and other as a backup

Sent from Cisco Technical Support iPhone App

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