Cisco Networking

BGP Conditional Advertisement

What is conditional advertisement and why to use it?Normally, routes are propagated regardless of the existence of a different path. The BGP conditional advertisement feature uses the non-exist-map and the advertise-map keywords of the neighbor advertise-map command in order to track routes by the route prefix. If a route prefix Read more…

By Joe Conklin, ago
Cisco Networking

Configuring Layer 3 MPLS VPN

What is a Layer 3 MPLS VPN and why to use it?Layer 3, or VPRN (virtual private routed network), utilizes layer 3 VRF (VPN/virtual routing and forwarding) to segment routing tables for each customer utilizing the service. The customer peers with the service provider router and the two exchange routes, Read more…

By Joe Conklin, ago
Cisco Networking

Configuring BGP

What is BGP and why to use it?Border Gateway Protocol (BGP) is a standardized exterior gateway protocol designed to exchange routing and reachability information among autonomous systems (AS) on the Internet. The Border Gateway Protocol makes routing decisions based on paths, network policies, or rule-sets configured by a network administrator Read more…

By Joe Conklin, ago
Cisco Firewall

Zone-Based Firewall

What are Zone-Based Firewalls and how to use them?Zone-Based Firewalls (ZBF) is a firewall methodology of placing interfaces into zone and defining traffic definitions to allow traffic to pass or drop. In the past firewalls were comprised of access-list that would define both source and destination as well as having Read more…

By Joe Conklin, ago