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LAB :: Testing PRE & CODE

Published on January 6, 2012 by in BGP

This post is to test that pre is showing router config in the way that I want it to.

 

This Section is “pre”

R18#sh run | sec router bgp
router bgp 20
no synchronization
bgp log-neighbor-changes
bgp confederation identifier 300
bgp confederation peers 10
network 18.18.18.0 mask 255.255.255.0
neighbor 10.17.18.17 remote-as 20
neighbor 10.17.18.17 next-hop-self
neighbor 10.18.19.19 remote-as 400
no auto-summary

 

This section is “code”

R18#sh run | sec router bgp
router bgp 20
no synchronization
bgp log-neighbor-changes
bgp confederation identifier 300
bgp confederation peers 10
network 18.18.18.0 mask 255.255.255.0
neighbor 10.17.18.17 remote-as 20
neighbor 10.17.18.17 next-hop-self
neighbor 10.18.19.19 remote-as 400
no auto-summary

 
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“If Crocs Ate Old-Socs, Old-Crocs Expire”

Published on January 6, 2012 by in BGP, mnemonic

A mnemonic to help me remember the BGP finite state machine and a doodle to jazz it up.

“If Crocs Ate Old-Socs, Old-Crocs Expire”

I = idle

C = Connect

A = Active

OS = OpenSent

OC = OpenConnect

E = Established

http://en.wikipedia.org/wiki/Border_Gateway_Protocol#Finite-state_machine

 
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bgp-best-path-mnemonic

Published on January 5, 2012 by in 2012, BGP

I didn’t create this but I think its great, thank you Richard Bannister @ http://rbcciequest.wordpress.com

He created this very useful mnemonic for remembering the BGP best path Selection process.

 

“We Love Oranges AS Oranges Mean Pure Refreshment”

 

 

“We Love Oranges AS Oranges Mean Pure Refreshment”
W Weight (highest)
L Local Pref (highest)
O Originate (local)
A AS Path (shortest)
O Origin (igp > egp > incomplete)
M MED (lowest)
P Paths (external > internal)
R RID (lowest)


 

“We Love Oranges AS Oranges Mean Pure Refreshment”

 
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LAB :: Basic BGP configuration

Published on January 5, 2012 by in 2012

I have been building a virtualised BGP router lab in order to study for the Cisco CCIP BGP exam. I have created quite a large topology consisting of 20 routers. You can find the Topology buy clicking on the “BGP LAB Topology” page on the menu at the top page.

So far I have configured all of the interface IP addresses, the loopback 0 IP address, frame-relay in AS3 with OSPF as the IGP, BGP in all the AS’s, AS3 has two confederations 345 & 67 and AS300 has two confederations 10 & 20 and each router is advertising its loopback 0 address via BGP.

 
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