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 →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 →Crating a Python script to control the GPIO of my Raspberry Pi
To practice for my CCNP ENCOR I've been creating simple Python scripts recently. I've got a few Raspberry Pis and temperature sensors lying around at…
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…
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