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- Basic of BGP routing Protocol – A Two Napkin Protocol – Part 1
A 30-year-old protocol that still has its value: - BGP protocol It is also called the Two Napkin Protocol (Not an official name) If I look at a bit of the history of this protocol then in 1989 when Kirk Lougheed, Len Bosack, and Yakov Rekhter were sharing a meal at an IETF conference They famously sketched the outline of their new routing protocol on the back of some napkins, hence often
- BGP Zero to Hero Part 8, BGP filtering methods - Cisco Learning Network
The BGP Prefix-Based Outbound Route Filtering feature uses Border Gateway Protocol (BGP) outbound route filter (ORF) send and receive capabilities to minimize the number of BGP updates that are sent between BGP peers
- BGP - Understanding Inbound Traffic Engineering
Understanding of the BGP Best-Path selection process In order to show the various options that you have to try an manipulate how traffic enters your network I will be using the following topology
- BGP Zero to Hero Part 7, BGP Communities - Cisco Learning Network
The BGP community is the tagging mechanism we use to mark our BGP prefixes The BGP community is an Optional, Transitive BGP attribute, meaning that if they exist they should be propagated to all BGP neighbors (The word “Optional” here means it’s optional to use, but once you used it should be propagated to all BGP neighbors)
- Introduction to VXLAN and EVPN - Cisco Learning Network
Ability to discover VTEPs through BGP messaging rather than based on receiving VXLAN-encapsulated frames This is more secure than blindly accepting all VXLAN-encapsulated frames
- how to view BGP neighbor status in a VRF setup
BGP show command for VRFs can become very long You need to issue the show bgp vrf [VRF-NAME] all summary command to view the same information as you would with the show bgp summary command but specific for the VRF in question
- Basic of BGP routing Protocol – A Two Napkin Protocol – Part 2
BGP is scalable and stable, hence it handles millions of routes in the global routing table There is a term called BGP free backbone, this is possible that our backbone iol-0 router doesn't have any BGP information and still we can route traffic between iol-1 and iol-2 without redistribution routes or direct links between Iol-1 and iol-2 routes
- BGP Zero to Hero Part 9, AS-Path Attribute Manipulation
BGP uses the AS_PATH attribute for loop detection and avoidance The AS_PATH attribute is a list of AS numbers that the update has traversed BGP router adds it’s own AS number to the AS_PATH sequence (attribute) when it advertise the update to a neighbor in another AS
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