BGP Configuration on Cisco IOS XE: eBGP and iBGP
BGP configuration is mechanically simple. The command set is small, and a basic peering comes up in half a dozen
4 min read
BGP
Border Gateway Protocol, the path-vector protocol that holds the internet together and increasingly runs inside enterprise data centers. Articles tagged BGP cover fundamentals, neighbor states, path attributes, best-path selection, traffic engineering, and Cisco IOS XE configuration.
40 posts
BGP Weight: The Cisco-Only Path Attribute (and When to Use It)
BGP weight is the first tiebreaker in the path-selection algorithm, set locally and never propagated. The three ways to set it, how it compares to LOCAL_PREF, and worked examples.
5 min read
BGP Looking Glass: What It Is, Public Servers, and Hosting Your Own
BGP looking glasses explained: what they show, the public servers worth bookmarking, a four-step troubleshooting recipe, and how to host your own with hyperglass.
5 min read
OSPF vs BGP Redistribution: Which Protocol Wins Which Tie
When OSPF and BGP both know about the same prefix, who wins? A practical walkthrough of mutual redistribution, the admin-distance trap, and why BGP into OSPF needs a filter or it takes down your domain.
5 min read
members
BGP Field Reference (9-Page Printable Cheat-Sheet)
BGP has a lot of moving parts. The state machine. The 13-step path-selection algorithm. The dozen knobs that
3 min read
Routing Protocols Over GRE: OSPF, EIGRP, BGP
Run OSPF, EIGRP, and BGP across GRE tunnels on Cisco IOS XE. Recursive routing fix, OSPF network types, EIGRP metric tuning, and BGP update-source.
8 min read