BGP AS-PATH manipulation techniques: local-as, prepending, allowas-in, as-override
The AS-PATH is one most interesting BGP path attribute. It's a well known, mandatory, and transitive path attribute, so it must be included in every…
Read more →Post for: #Cisco (35 Posts)
Implementing Unified MPLS
Because of scalability reasons we might have multiple IGP processes running within our core network. If we have many routers and prefixes we might have…
Read more →Implementing MPLS-TE: VPN over the TE tunnel from PE to PE, TE metric, explicit-path
By default the IGP metric (ISIS/OSPF cost) determines how the packets are forwarded within the MPLS core. With MPLS Traffic Engineering (TE) we can be…
Read more →Ethernet Flow Point: VLAN tag manipulation for the VPLS service
We continue one of my previous VPLS topology: this time we're going to take a look at what happens from the perspective of the service…
Read more →Implementing Site-to-Site IPsec VPN: GRE over IPsec and MTU issues (Part 3)
In the previous post I created the VPN tunnel between the two sites with a crypto map. This implementation is very static, the ACLs define…
Read more →Implementing Site-to-Site IPsec VPN with crypto map (Part 2): Troubleshooting
We continue the previous IPsec lab with basic troubleshooting. If you haven't read part 1, read that post first before you continue. So what are…
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