Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manual de usuario descargar pdf (Pagina 157)

Configuring Route and Traffic Balancing

308628-15.0 Rev 00

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Assume that the IP routing table on the BGP router in the local AS contains two

ECMP static routes to the circuitless (virtual) interface of the BGP router in the

remote AS. One ECMP route uses interface 1; the other route uses interface 2.

Assume also that the two EBGP speakers have established a peer-to-peer session

using their circuitless (virtual) IP interfaces.

Now assume that the local EBGP speaker has received from its remote peer

advertisements for routes to three destinations: destination_1, destination_2, and

destination_3.

If you configure the local EBGP speaker for ECMP route balancing, BGP submits

one BGP route to the routing table for each BGP destination, using in turn

(round-robin) the available ECMP routes, as follows:

BGP submits a BGP route to destination_1 and specifies interface 1 as the

next hop.

BGP submits a BGP route to destination_2 and specifies interface 2 as the

next hop.

BGP submits a BGP route to destination_3 and specifies interface 1 as the

next hop.

If you configure EBGP for traffic balancing, BGP submits multiple BGP routes,

one for each static ECMP route, as follows:

BGP submits two IP routes to destination_1. One route specifies interface 1;

the second route specifies interface 2.

BGP submits two IP routes to destination_2. One route specifies interface 1;

the second route specifies interface 2.

BGP submits two IP routes to destination_3. One route specifies interface 1;

the second route specifies interface 2.

You can use the BCC or Site Manager to configure EBGP ECMP for route and

traffic balancing.

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Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manual de usuario Pagina 157