Written

BGP Notes - Confederations

2011-06-11 ·2 min read

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 …

350-001 bgp ccie confederations written

BGP Notes - Route Reflectors

2011-06-11 ·1 min read

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 …

350-001 bgp ccie reflector route written

BGP Notes - Synchronization

2011-06-11 ·1 min read

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 …

350-001 bgp ccie notes synchronization written

BGP Notes - Authentication

2011-06-10 ·1 min read

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

350-001 authentication bgp ccie notes written

EIGRP Notes - Authentication

2011-06-10 ·1 min read

Corrections - I invite them. 1. Create the keys in the keychain. R101(config)#key chain KEYCHAIN R101(config-keychain)#key 1 R101(config-keychain-key)#key-str R101(config-keychain-key)#key-string …

350-001 authentication ccie chain eigrp key md5 written

OSPF Notes - Authentication

2011-06-10 ·1 min read

Corrections appreciated. Type 0 : No authentication. This is the default type. R0(config-if)#ip ospf authentication null ----- R0(config-router)#area 1 virtual-link 2.2.2.2 authentication null Type 1 …

350-001 authentication ccie digest md5 ospf type written

BGP Notes - Path Decision

2011-06-09 ·2 min read

This is required blogging…and reading for that matter. A good chunk of this is taken from my CCNP posts from last year. Corrections, please. -—- How does a BGP router decide which BGP …

350-001 bgp ccie decision notes path written

OSPF Notes - LSA Types

2011-06-02 ·2 min read

Yes, it is inevitable that I cover these. I’m sure network types will be next. Per my usual request, please correct my stupidity. Type 1 - Router : This LSA type lists all the routers by RID as …

350-001 ccie cisco dbd hello lsa lsack lsr lsu message ospf type written

OSPF Notes - Neighbor States

2011-06-02 ·2 min read

My prediction about covering network types was wrong. I’m going to puke out some information about neighbor states for now. As is always the case, corrections are welcome. Down : No hellos have …

350-001 ccie cisco dbd hello lsa lsack lsr lsu message ospf type written

OSPF Notes - Message Types

2011-06-01 ·2 min read

I have had my nose deep in several books in preparation for my CCIE R&S written exam, so I haven’t been blogging much at all. Now that I’ve made it to the more familiar topics, …

350-001 ccie cisco dbd hello lsa lsack lsr lsu message ospf type written