Aaron's Worthless Words

Sign in Subscribe

bgp

Stuff about BGP

Junos Basics - Configuring BGP

I’m stuck deep in Junos these days. I mean deep. I have an F5 load balancer and an ASA 5520; the rest of my stuff is Juniper. That means I have some learning to do. Here’s one of the basics in Junos – configuring BGP. I guess I’ve

VRF-Aware IPSec Tunnels

Man, time is hard to come by of late. I’ve had so little time to rest that’s it’s hard to get my thoughts together. It’s a good thing in this case, though, since it’s my fantastic job that’s taking all my time. It’s

BGP Notes - Synchronization

* With synchronization on, route must be synchronized to an IGP in order for that routes to be able to be voted ‘best” by BGP. * That means the exact route must already be in the routing table via an IGP. * Static routes don’t count. * This is traditionally accomplished by redistributing

BGP Notes - Backdoor Routes

* The fact that eBGP has an AD of 20 can be a problem. * You may have a very short path via EIGRP (or OSPF or RIP or whatever other IGP), but the longer eBGP path will be preferred. * For God’s sake, do not lower the AD of EIGRP! Havoc

BGP Notes - Route Reflectors

* Route reflectors remove the requirement of having a full mesh iBGP network. * Any iBGP route a router reflector learns is sent to all route reflector clients. * Non-client iBGP neighbors do not get the new route per iBGP rules. * RR clients are configured like normal iBGP routers. * All RR client config

BGP Notes - Confederations

* RFC 3065 * BGP confederations reduce the size of full mesh iBGP ASes by dividing it up into different areas. * Confederations also remove the need for BGP synchronization since all iBGP routers will have all routes. * In effect, your iBGP AS gets chopped up into different sub-ASes. * Each router is a

BGP Notes - Authentication

Corrections welcome. It’s simple as pie to enable MD5 auth to a BGP peer. R102(config-router)#neigh 192.0.2.101 pass MYKEY