We're Sorry, Full Content Access is for Members Only...

If you like to keep on reading, Become a Member Now! Here is Why:

  • Learn any CCNA, CCNP and CCIE R&S Topic. Explained As Simple As Possible.
  • Try for Just $1. The Best Dollar You've Ever Spent on Your Cisco Career!
  • Full Access to our 546 Lessons. More Lessons Added Every Week!
  • Content created by Rene Molenaar (CCIE #41726)


297 New Members signed up the last 30 days!


100% Satisfaction Guaranteed!
You may cancel your monthly membership at any time.
No Questions Asked!

Notable Replies

  1. Hello Rene,


    What mean a network is dampened and History in the BGP table?

  2. Hi Edwin,

    I'll create a separate post for this, it's about BGP Dampening.

    When a route is unstable, it's possible that it gets advertised and then removed again all the time...we don't want to see this, we want our BGP tables to be steady and stable.

    To prevent this from happening, a route that appears and disappears gets a "penalty". Once you exceed a certain threshold, it won't be advertised for a certain time. This is called "dampening".

    I'll cook up some examples for this so you can see how it works.


  3. Hello Rene

    How do you use the glass server?

  4. bear83 says:

    Hi Rene,

    i'm new to bgp and i really appreciate your lesson.

    Why R2 show only one path to
    I would expect another path with nexthop and AS 1 3 4 as path signed valid but not the best, like R3 does.


  5. Hi Claudio,

    Glad to hear you like it. R2 only has one path since R1 only advertises its best path to R2. The best path for R1 is through R2.

    A useful command when you have doubts why something shows up or not is the show ip bgp neighbors advertised-routes command. It will show you what you the router is advertising to you.


Continue the discussion forum.networklessons.com

5 more replies