CCIE 6to4 Tunnelling (GNS3 Lab) This is a quick lab to look over how 6to4 tunnelling can be implemented using GNS3 1.3 and 3725 (running c3725-adventerprisek9-mz124-15.image). The topology will be as below but the important part
BGP BGP RTBH setup using exaBGP [toc]In this post I'll describe a basic setup using Cisco IOS, IOS XR and exaBGP that will function as a BGP remotely triggered blackhole (RTBH) allowing you to null route any source/
642-691 BGP+MPLS Difference between Router Descriptor (RD) and Route Target (RT) Studying towards the SPEDGE (great word Cisco!) tonight and couldn't quite define exactly Route Descriptors and Route Targets. So lets try First off it might be important (and obvious) to note both RT
642-691 BGP+MPLS BGP Route Reflectors (GNS3 lab) One problem of having a large number of routers running IBGP with each other in a full mesh is the volume of IBGP connections needed. The formula to see the number of connections
642-691 BGP Attributes When BGP sends an UPDATE packet to a peer it sends path attributes associated with the prefix. These path attributes are then used by BGP to pick the best route to a destination.
642-642 QoS fields The QoS fields used by the network device depend on the capabilities of the device and the QoS deployments of the network. Below is a little info about a few of these fields.
642-642 IP Precedence DSCP and CoS relationships As part of studying the 642-642 QoS exam course is seems quite important to understand the relationship between the various ways of marking traffic. Below are some notes I've made so far about