Tag Archives: BGP

Cert Summit BGP Issue – SOLVED!

Wow! How interesting. I have never seen VIRL fail like that before. It was indeed a flawed loading of my configurations that was the issue with the demonstration. Check out how smoothly our intended configuration went after reloading the VIRL topology!

What is surprising about this whole thing was that I cannot believe BGP worked at all!

R3#conf t
 Enter configuration commands, one per line.  End with CNTL/Z.
 R3(config)#router bgp 65213
 R3(config-router)#neighbor remote-as 500
 R3(config-router)#neighbor update-source lo0 
 R3(config-router)#neighbor ebgp-multihop 2
R5#conf t
 Enter configuration commands, one per line.  End with CNTL/Z.
 R5(config)#router bgp 500
 R5(config-router)#neighbor remote-as 65213
 R5(config-router)#neighbor update-source lo0
 R5(config-router)#neighbor ebgp-multihop 2
 *Mar 31 16:48:10.197: %SYS-5-CONFIG_I: Configured from console by console
 *Mar 31 16:48:10.843: %BGP-5-ADJCHANGE: neighbor Up 
 *Mar 31 16:48:11.700: %PNP-6-PNP_DISCOVERY_STOPPED: PnP Discovery stopped (Config Wizard)
R5#show ip bgp summary 
 BGP router identifier, local AS number 500
 BGP table version is 1, main routing table version 1
 Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd     4        65213       8       8        1    0    0 00:03:42        0

CCIE Core Concepts – BGP Well-Known Mandatory Attributes

CCIE Lab Exam

Over at CBT Nuggets, several of the CCIE instructors polished up our CCIE-level videos to make sure we are efficiently teaching you the Core Concepts you must master en route to your CCIE Certification. This sample Nugget is from the Layer 3 course found here:

This is one of the many Nuggets on Border Gateway Protocol (BGP) which I personally found to be a big challenge as I was working to my expert-level certification. Enjoy!