Examples to demonstrate the support of routing in NeST

This directory contains the examples to demonstrate how dynamic routing protocols and static routing can be used to form routes in NeST.

Support of dynamic routing protocols NeST currently supports three routing suites and Multi Protocol Label Switching (MPLS) to provide the support of dynamic routing:

• Quagga [official website]

• Free Range Routing (FRR) [official website]

• BIRD Internet Routing Daemon (BIRD) [official website]

• Multi Protocol Label Switching [overview]

Note: You can install either Quagga or FRR routing suite to use dynamic routing APIs in NeST, but both cannot be installed at the same time. The steps to install the docker image are provided in Installation instructions. There are no such constraints on the installation of BIRD and it can be simply used in conjunction with Quagga or FRR.

NeST passively supports quagga because it is no longer maintained by the quagga community. FRR is the default in NeST. The Dockerfile will not generate an image with a quagga installation.

There are six sub-directories inside this directory, one each for examples related to quagga, frr, bird, mpls, static-routing and print_routes_to_file(). The necessary instructions to install prerequisite packages are provided in separate README files in the respective sub-directories. It is highly recommended to walk through these README files before proceedings with the example programs.

NeST supports three routing protocols: Intermediate System to Intermediate System (ISIS), Open Shortest Path First (OSPF) and Routing Information Protocol (RIP) via both quagga and frr. In NeST, the BIRD routing suite, the OSPF and RIP routing algorithms are supported, while ISIS is not. Label Distribution Protocol (LDP) is supported for label distribution in MPLS.

Support of static routing NeST supports statically populating the routing tables by constructing a spanning tree of the network using Depth First Search (DFS). No additional libraries are required to use static routing in NeST.

• Examples to demonstrate the usage of Free Range Routing (FRR) Suite in NeST
  • 1. frr-isis-point-to-point-2.py
  • 2. frr-isis-point-to-point-3.py
  • 3. frr-ospf-point-to-point-2.py
  • 4. frr-ospf-point-to-point-3.py
  • 5. frr-rip-point-to-point-2.py
  • 6. frr-rip-point-to-point-3.py
  • 7. frr-rip-point-to-point-multi-address.py
• Examples to understand the support of MPLS in NeST
  • 1. mpls-basic-ce-pe-routers.py
  • 2. mpls-ce-pe-p-routers.py
  • 3. mpls-ldp-ce-pe-p-routers.py
  • 4. mpls-ldp-ce-pe-p-routers-multi-address.py
• Examples to demonstrate the usage of Quagga Routing Suite in NeST
  • 1. quagga-isis-point-to-point-2.py
  • 2. quagga-isis-point-to-point-3.py
  • 3. quagga-ospf-point-to-point-2.py
  • 4. quagga-ospf-point-to-point-3.py
  • 5. quagga-rip-point-to-point-2.py
  • 6. quagga-rip-point-to-point-3.py
  • 7. quagga-rip-point-to-point-multi-address.py
• Examples to demonstrate the support of static routing in NeST
  • 1. static-routing-point-to-point-2.py
  • 2. static-routing-point-to-point-3.py
• Examples to show the use of BIRD Internet Routing Daemon (BIRD) Suite in NeST
  • 1. bird-ospf-point-to-point-2.py
  • 2. bird-ospf-point-to-point-3.py
  • 3. bird-rip-point-to-point-2.py
  • 4. bird-rip-point-to-point-3.py