Building on from the previous guide on DMVPN Phase 2, we are going to transition from Phase 2 to Phase 3. This is only really relevant if you are doing summarisation at the Hub. Lets remind ourselves of the topology: We are currently running Phase 2. So we are forming Read more…
Building on from the previous guide, we are going to transition from DMVPN Phase 1 to DMVPN Phase 2. This will bring some important improvements and some considerations. Lets remind ourselves of the topology: The Hub is still always going to be in the control plane path for the setup Read more…
In this guide, we will setup DMVPN Phase 1. In that we have one central hub, with multiple spokes. Spokes will learn about both Hub and other Spoke prefixes via EIGRP. Spoke to Spoke traffic is permitted, however the Hub is used in the Data Path. Lets have a look Read more…
In this guide, I will show how to implement basic Policy Based Routing on a Layer 3 Switch. Here is the topology we will work on: In this scenario, we have two routers connected to a core switch. We then have some clients in Vlan 30 attached to the switch. Read more…
When using BGP and peering with multiple ISPs at the edge, you can use a feature within BGP that allows you to advertise networks to a neighbour dependent on the existence of a route in the BGP RIB. This is called conditional route advertisement. In this guide, we will be Read more…
When you peer with a Service Provider using BGP. They will likely ask you if you want the full BGP table, a partial table or just a default route. Most devices you have on your companies edge, will not be able to handle the full BGP table. As even just Read more…
When you peer with a Service Provider using BGP. They will likely ask you if you want the full BGP table, a partial table or just a default route. Most devices you have on your companies edge, will not be able to handle the full BGP table. As even just Read more…
VRFs are an excellent tool for Layer 3 separation on a router. Allowing you to separate routing domains and control where traffic can be routed, much like VLANs on a Switch. VRFs are also required for MPLS L3VPN deployments. There may be a requirement for you to leak routes from Read more…
VRFs are an excellent tool for Layer 3 separation on a router. Allowing you to separate routing domains and control where traffic can be routed, much like VLANs on a Switch. VRFs are also required for MPLS L3VPN deployments. There may be a requirement for you to leak routes from Read more…