Author: Chris Yoon

Cogent AS174 BGP Community Strings Attention This BGP Community string information might be outdated. Please contact Cogent Communication AS174, Inc. to get recent update. This BGP…

Cable&Wireless AS1273 BGP Community Strings Attention This BGP Community string information might be outdated. Please contact Cable&Wireless AS1273 to get more recent update. This BGP communites…

AT&T AS7018 BGP Community Strings Attention This BGP Community string information might be outdated. Please contact  AT&T(SBC) AS7018 to get more recent one. This BGP communites…

Abovenet AS6461 BGP Community Strings Attention This BGP Community string information might be outdated. Please contact Abovenet AS6461 to get more recent one. This BGP communites…

Major RFC’s for BGP RFC 1105, Obsolete – Border Gateway Protocol (BGP) RFC 1654, Obsolete – A Border Gateway Protocol 4 (BGP-4) RFC 1655, Obsolete…

Here is a basic Cisco BGP commands 1. How do I remove a neighbor? router(config)# router bgp router(config-router)# no neighbor 2. How do I shutdown…

1. Multi Exit Discriminator – Used to select between paths to the destinations listed. 2. Local Preference – Allowing AS border routers to inform the…

1. Local Pref Value 2. As Path Length 3. Origin(prefer IGP than EGP than Incomplete – Lowest) 4. MED (Lowest value) 5. Prefer strictly internal…

1. Largest Weight – Cisco proprietary. Only valid on the router it is configured on. It is not passed to other routers. 2. Highest Local…

1. Atom  An atom is a single character, such as the following . – Matches any single character ^(Carat) – Matches the beginning of the…