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Nick Carlton

Cisco

MPLS L3VPN Configuration – Giving Customers Internet Access

By Nick Carlton, 2 months1st May 2022 ago
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…

By Nick Carlton, 3 months30th March 2022 ago
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…

By Nick Carlton, 5 months6th February 2022 ago
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…

By Nick Carlton, 6 months13th January 2022 ago
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…

By Nick Carlton, 6 months9th January 2022 ago
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…

By Nick Carlton, 6 months3rd January 2022 ago
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…

By Nick Carlton, 6 months3rd January 2022 ago
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…

By Nick Carlton, 6 months1st January 2022 ago
Cisco

Cisco MPLS L3VPN Configuration – BGP as the PE-CE Routing Protocol

By Nick Carlton, 6 months25th December 2021 ago
Cisco

Cisco MPLS L3VPN Configuration – Core MPLS and BGP Configuration

By Nick Carlton, 6 months ago

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Recent Posts
  • MPLS L3VPN Configuration – Giving Customers Internet Access
  • Cisco Policy Based Routing on L3 Switch
  • BGP Conditional Route Advertisement for ISP Failover
  • Using community values and route maps to create a partial BGP table
  • Using prefix lists and route maps to create a partial BGP table
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