CCIE and its experiments | Life after CCIE

 Today we will cover some confusing options of the BGP 1). Route Dampening is only working for eBGP routes. It will not trigger on iBGP route. This technique is applied when receiving updates from external peers only (EBGP). Applying this technique to IBGP learned routes or to advertisement to IBGP or EBGP peers after making a route selection can result in routing loops. 2).  Peer Group : Since IOS version 12 manual peer group configuration is no longer necessary to achieve this optimization. IOS is capable of recognizing neighbors with the same outbound policy. These are then grouped together automatically. This is a feature called Dynamic Update Peer Groups. You can check the Dynamic groups using the command "show IP bgp update-grou p" command.  Changing a policy in out direction to a neighbor will also change the update group in the backend.  3). Simplifying Route Reflector rule : Books say there are three rules. But as per my complete understanding of this...

 What is Slow peer detection? We have a group of routers with the same outgoing route-map (outbound policy), which means the router will place all neighbors in the same group because the router wants to save resources to perform the same task multiple times for example: sending route updates.  The router will select a "Leader Router or Neighbor" and perform update or other algorithm tasks and will also replicate to all other routers in the same group.  What if any of one router is too slow due to hardware or software issues? This slow router is called Slow Peer. Slow peers affect the BGP convergence of the entire update group. If one BGP peer is slow, it causes the entire update group to slow down. The result is that the other update group members will have slower convergence as well. For this reason, the issue should be resolved. You can identify the slow peer and move it out of the update group. In order to complete this task, you can change the outbound policy for...

 Today's topic is BGP: 1).  For Incoming traffic from the other AS to Local AS, BGP MED , AS-PATH Prepending , and Community Attributes can be used.  2.  BMP (BGP Monitoring Protocol) is an automated way of collecting BGP data from routers.  3).  BMP offers following Advantages as: Configure devices to function as BMP servers, and set up parameters on the servers, that are required for monitoring of the BGP neighbors. Establish connectivity of the BMP servers with BGP neighbors for monitoring. Generate statistics report from monitoring the BGP neighbors. Perform appropriate error handling on the BGP neighbors. Graceful scale up and degradation to the point of closing connectivity between the BMP servers and BGP neighbors. Read More about BMP :