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Bgp

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1 ACCEPTED SOLUTION

Accepted Solutions

BGP link load balancing

Q1. What is the point of connecting two routers back to back as update path and then configuring each others IBGP arm as neighbour ?

A. As per my understanding, this connectivity will act as failover between routers and will be the path for load sharing on links.

Exactly,you got it.

In case the eBGP neighbor pointing to the ISP side goes down you could still router the packets via the iBGP neigbhor (you have to make sure the routes are valid).

Q2. I have got my basic BGP connectivity established with ISP and able to surf with my AS what exact set of commands i should enter and edit attributes to achieve load balacing over both links. Thanks.

In this case we have multiple local routers with multihomed connectivity.

As per Cisco documentation: Load-balancing is impossible here as BGP will only select the best route, load-sharing will will available for you and you can do it with the usage of the BGP hop attributes.

Here is a quick link for that:

http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a00800945bf.shtml#conf5

For Networking Posts check my blog at http://www.laguiadelnetworking.com/category/english/

Cheers,

Julio Carvajal Segura

Looking for some Networking Assistance? Contact me directly at jcarvaja@laguiadelnetworking.com I will fix your problem ASAP. Cheers, Julio Carvajal Segura http://laguiadelnetworking.com
1 REPLY

BGP link load balancing

Q1. What is the point of connecting two routers back to back as update path and then configuring each others IBGP arm as neighbour ?

A. As per my understanding, this connectivity will act as failover between routers and will be the path for load sharing on links.

Exactly,you got it.

In case the eBGP neighbor pointing to the ISP side goes down you could still router the packets via the iBGP neigbhor (you have to make sure the routes are valid).

Q2. I have got my basic BGP connectivity established with ISP and able to surf with my AS what exact set of commands i should enter and edit attributes to achieve load balacing over both links. Thanks.

In this case we have multiple local routers with multihomed connectivity.

As per Cisco documentation: Load-balancing is impossible here as BGP will only select the best route, load-sharing will will available for you and you can do it with the usage of the BGP hop attributes.

Here is a quick link for that:

http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a00800945bf.shtml#conf5

For Networking Posts check my blog at http://www.laguiadelnetworking.com/category/english/

Cheers,

Julio Carvajal Segura

Looking for some Networking Assistance? Contact me directly at jcarvaja@laguiadelnetworking.com I will fix your problem ASAP. Cheers, Julio Carvajal Segura http://laguiadelnetworking.com
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