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Communications Technologies Tips and Tricks (CT³)

Welcome to CT³, your independent source of communication technologies resources, configurations, scripts and utilities.

Design solutions Multihoming Default routing Load sharing Technologies IP Routing Border Gateway Protocol (BGP) Open Shortest Path First (OSPF) Enhanced Interior Gateway Routing Protocol (EIGRP) Routing Information Protocol (RIP) Protocol-Independent Multicast (PIM) IP Version 6 Static routes IP Services Network Address Translation (NAT) Quality of Service (QoS) Unified communications Security Virtual Private Networks (VPN) MPLS-based VPN Wide-area networks Multi-protocol Label Switching (MPLS) MPLS Traffic Engineering (MPLS TE) Frame Relay Network management Tclsh - scripts executed from IOS command line interface Embedded Event Manager (EEM) Embedded Resource Manager (ERM) Embedded Menu Manager (EMM)

Resources Tutorials Tcl scripts for Cisco IOS EEM applets and Tcl policies for Cisco IOS Sample configurations Utility programs and scripts Recent changes BGP route reflectors Display locally originated BGP routes Protecting the router’s control plane Installing and running Quagga Use Quagga to generate BGP routes Control and Data plane BGP Templates on MPLS VPN PE-routers (Non)Transit Autonomous System OSPF area configuration best practices PIM Sparse Mode PIM Dense Mode Protocol Independent Multicast Bidirectional PIM OSPF as a distance vector protocol RIP interface summaries cause routing loops External default route in NSSA area Generate hostnames from router configurations MPLS Traffic Engineering in MPLS VPN environment BGP route aggregation/Suppressing routes BGP route aggregation/Preserving AS numbers BGP route aggregation/Modifying aggregate attributes BGP route aggregation