# List of networking use cases for CNF WG discussion

What are some networking use cases which can be used for context and assessment?

As part of any proposed best practices it is requested to provide 1 or more use cases showing where the best practice could be used.

Goal:

- Relating best practices to real world use cases.
- Discussion of core features and functionality from use cases and their NFs.
- Examination of existing use cases to discussion of kubenative implementations which provide the core features and functionality.

When adding a use case to the list please provide some context on the following attributes/properties if known:

- Complexity: simple to very complex
- Domain: telco specific, mobile core, mobile edge
- Open source example(s): list if available
- What OSI layer(s)?
- Common/standard protocols used: eg. [DOCSIS](https://en.wikipedia.org/wiki/DOCSIS), GRPC, SNMP
- Proprietary protocols used?
- Links to external material on the use case, including presentation, code, etc.

Please feel free to add any other context with the use case that helps with a better shared understanding.

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## Example use cases:

### Bump in the wire / transparent firewall. No IP address on data/user plane. In-line filtering

- Complexity: simple
- Domain: general networking, security

### VPN clients connecting to a VPN gateway connecting to concentrator

### Evolved packet Core - User plane NFs

- Networking examples from Vuk https://github.com/cncf/cnf-wg/discussions/37#discussioncomment-265250
- CNF Testbed MWC mobile core pres

**Control plane focus**
- See Vuk example above

**Data/user plane focus**

- GoGTP based examples in CNF Testbed https://github.com/cncf/cnf-testbed/tree/master/examples/use_case/gogtp-k8s
- Based on https://github.com/wmnsk/go-gtp

**Bypassing the tower**
- VoWifi with ePDG

### BGP Speaker

Refs:
- https://osrg.github.io/gobgp/ - https://github.com/osrg/gobgp
- https://github.com/cloudnativelabs/kube-router
- https://github.com/cloudnativelabs/kube-router/blob/master/docs/bgp.md