Bgp

BGP Notes - Neighbor States

2011-06-07 ·1 min read

Corrections appreciated. Idle : There is no relationship, but the router sends out a TCP SYN to the neighbor to get the ball rolling. Idle (admin) : The neighbor is admined down. Connect : The router …

350-001 bgp ccie notes peer state

Routing IPv6 with BGP - The Basics

2011-02-10 ·6 min read

Are you sensing a theme lately? Since we covered the basics of the main IGPs (I’m an enterprise guy, so no IS-IS comments, please.), I thought I’d try to describe the basics of advertising …

address-family as bgp ipv6 mpbgp multiprotocol neighbor remote-as route router-id unicast

Tagging External Routes in EIGRP

2010-12-03 ·2 min read

EIGRP allows you to tag external routes. That is, any route redistributed into EIGRP can be tagged with a numeric descriptor from 0 to 4294967295.

bgp egp eigrp external igp ospf redistribution route routing tag

ROUTE Notes - Further IGP Redistribution

2010-07-18 ·3 min read

As always, corrections are requested. Study Questions I’ve got IGRP and EIGRP both configured with the same AS number. What’s special about this configuration? If both use the same AS …

642-902 bgp ccnp certification cisco eigrp exam ospf redistribution route test

ROUTE Notes - Controlling BGP

2010-07-06 ·4 min read

Corrections, please. I skipped a bunch of BGP intro stuff to get to the juicy center. I’ll see if I can come back later and finish the other parts for posterity. Study Notes Is BGP route …

642-902 bgp ccnp cisco path

Stubby Post - show ip protocols

2010-06-10 ·3 min read

I’ve seen and used the command before, but I’ve never really seen any use of the show ip protocols command until tonight while reading up for my ROUTE test. There’s a lot of good …

642-902 bgp certification eigrp ip ospf protocols route show test

Renesys Analysis of SuproNet Announcement Debacle

2009-02-18 ·1 min read

Earl Zmijewski of Renesys has an analysis of the SuproNet incident that took down a good bit of the Internet on Monday. From the blog: This single Czech provider announcing a single prefix caused a …

bgp bgp-internet routing

ACLs and HSRP, BGP, OSPF, VRRP, GLBP...

2008-06-12 ·2 min read

Here’s a handy list of ACL entries to allow your devices to speak routing protocols, availability protocols, and some other stuff. We’ll assume you have ACL 101 applied to your Ethernet …

acls bgp bootps dhcp dhcpd eigrp glbp hsrp ospf rip vrrp vrrp-e