BGP attributes
The BGP Multi Exit Discriminator (MED) attribute and tie-breaking
When BGP needs to choose which route to reach a certain destination is best, it first looks at the local preference and AS path...
Understanding the AS path and AS path prepending
In earlier articles, we discussed the next hop and local preference attributes. Today we'll be looking at the AS_PATH attribute as well as the...
What you should know about BGP’s LOCAL_PREF
In the previous blog post, we looked at the BGP NEXT_HOP attribute. Today we'll cover another attribute: the LOCAL_PREF or local preference. The local...
A fresh look at BGP’s NEXT_HOP
Once a BGP session is established, routers will exchange two types of messages: KEEPALIVE and UPDATE. Keepalive messages are sent to let a neighboring...