I've posted a BGP and MULTI-HOMING tutorial I just wrote. It was going
to be a Boardwatch column, but it turned out a bit too long and too
advanced for that.
Please take a look at http://www.netaxs.com/~freedman/bgp.html and
share comments and thoughts...
It's about 89k so I won't post it full-text to the list. Unfortunately
it's just Part 1 of maybe 10 parts that can and probably will be written
about routing in the next few months.
Please keep comments redirected to inet-access and NOT to nanog.
Here's a table of contents:
BGP
A WARNING
PREREQUISITES
BGP ROUTING: INTERNAL (INTERIOR) AND EXTERNAL
SO WHY IS BGP INTERESTING?
BEING "CONNECTED" TO THE INTERNET
HARDWARE AND SOFTWARE FOR SPEAKING BGP
PEERING SESSIONS AND ASNs: PART I
WHAT DO YOU DO WITH BGP?
PEERING SESSIONS
eBGP vs. iBGP
BGP AND THE SINGLE-HOMED
AS-PATHS
AS-PATH LENGTH AND BGP ROUTE SELECTION
AS-PATH ACCESS LISTS (FILTERS)
ENTERING, MODIFYING, AND DELETING as-path access-lists
BGP METRICS (ATTRIBUTES) AND ROUTE SELECTION: INTRODUCTION
BGP PATH SELECTION PROCESS ACCORDING TO CISCO
BGP ATTRIBUTE TYPES
EGP vs. IGP
WHAT IS ROUTE FLAP AND WHY IS IT BAD?
WHAT TO KEEP IN MIND WHEN CONFIGURING BGP
BGP AND PEERING
INTERNET CONNECTIVITY WITHOUT BGP
BGP AND THE SINGLE-HOMED
BGP AND THE MULTI-HOMED
MULTI-HOMING AND LOAD-BALANCING
HOW TO ANNOUNCE YOUR NETWORKS
BEING ADVERTISED BY MULTIPLE PROVIDERS WITHOUT PI-SPACE
CONTROLLING OUTGOING DATA FLOW: "FULL ROUTING"
CONTROLLING OUTGOING DATA FLOW: "PARTIAL ROUTING": "CUSTOMER ROUTES ONLY"
SO WHAT'S TO BE DONE?
AS-PATH PADDING
QUESTIONS AND COMMENTS
THANKS TO
TO BE DONE
Sidebars
Sidebar on Cisco BGP commands
Sidebar on next-hop-self
Sidebar on Outgoing Data Flow Control Without BGP
Thanks,
Avi