Beginner Tutorial
Cisco Policy Based Routing on L3 Switch
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…
Cisco
BGP Conditional Route Advertisement for ISP Failover
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…
Cisco
Using community values and route maps to create a partial BGP table
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…
Cisco
Using prefix lists and route maps to create a partial BGP table
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…
Cisco
Leaking Routes from Global to VRF – BGP
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…
Cisco
Leaking Routes from Global to VRF – Static Routes
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…
Cisco
MPLS LSP Walkthrough – With IGP Caveat
I am going to walk through how the LSP (Label Switched Path) is found on Cisco devices running LDP and go through a practical demonstration. First, lets look at our topology: In this demonstration we are looking at the path for traffic originating from CE_CUSTA_2 to CE_CUSTA_1. Let’s look at Read more…