Unit 1: Network Infrastructure
This will allow you to demonstrate your networking skills, knowledge, and abilities, with a focus on enterprise-level switching, routing, and multicast components that support cross-platform (inter)operability and integration with the most recent software-defined technologies.
BGP Local Preference Attribute
One well-known BGP property, Local Preference (or LOCAL PREF), is utilized when more than one exit path exists from a single AS. Locally within an AS, the LOCAL PREF tells routers which exit path to take, in contrast to the MED’s usage outside of an AS to instruct routers which entrance path to take.
In addition,
- We choose the one with the highest local preference.
- Outside of an AS, the LOCAL PREF characteristic is never advertised; it is only used between iBGP peers to convey the local preference.
Example
To illustrate how LOCAL_PREF works, let’s have a look at an example.
We have built our topology and example on the following:
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