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2. Influencing traffic paths for active/standby architectures
Synthèse
Achieving optimal traffic distribution often requires forcing traffic down a specific path, whether for cost optimization or managing active/standby interconnects. Customers have used BGP route policies to influence the preferred BGP route without touching their on-premises hardware. By dynamically modifying the BGP multi-exit discriminator (MED) attribute, network teams can make a specific peer preferred for incoming traffic. Conversely, if they want to steer traffic away from a congested or ba
Achieving optimal traffic distribution often requires forcing traffic down a specific path, whether for cost optimization or managing active/standby interconnects. Customers have used BGP route policies to influence the preferred BGP route without touching their on-premises hardware. By dynamically modifying the BGP multi-exit discriminator (MED) attribute, network teams can make a specific peer preferred for incoming traffic. Conversely, if they want to steer traffic away from a congested or backup link, they are using AS-PATH prepending — adding one or more values to the route's AS-PATH to deprioritize it across the broader network. Dive deeper: To see the configuration steps for managing MED and AS-Path prepending, read: Using BGP policies to influence traffic paths.
Source originale
medium.com