srv6

README

NextMN-SRv6

NextMN-SRv6 is an experimental implementation for some SRv6 MUP Endpoint Behaviors.

[!WARNING] This project is still at the early stages of development and contains bugs and will crash in unexpected manners. Please do not use it for anything other than experimentation. Expect breaking changes until v1.0.0

Roadmap

Provider	Behavior	Implemented?	Todo
NextMN	End.MAP	no	-
NextMN	End.M.GTP6.D	no	-
NextMN	End.M.GTP6.D.Di	no	-
NextMN	End.M.GTP6.E	yes	send ICMP when errors
NextMN	End.M.GTP4.E	yes	send ICMP when errors
NextMN	H.M.GTP4.D	yes	send ICMP when errors, optional: respond to GTP Echo Req
NextMN	End.Limit	no	-
NextMN	End.M.GTP6.E.Red	no	requires a map of gnbs addr; order of bit field considerations
NextMNWithCtrl	H.M.GTP4.D	partial	src address should not be hardcoded
NextMNWithCtrl	H.Encaps	partial	src address should not be hardcoded
Linux	End	yes	-
Linux	End.DX4	yes	-
Linux	H.Encaps	yes	-
Linux	H.Inline	untested	-

PDU Session Type	Supported?
IPv4	yes
IPv6	no
IPv4v6	no
Ethernet	no
Unstructured	no

Incoming packet flow

Getting started

Build dependencies

• golang
• make (optional)

Runtime dependencies

• iproute2
• iptables

Build and install

Simply run make build and make install.

Docker

If you plan using NextMN-SRv6 with Docker:

• The container requires the NET_ADMIN capability;
• The container should enable IPv6, and Segment Routing
• The container requires the forwarding to be enabled (not enabled by the container itself);
• The tun interface (/dev/net/tun) must be available in the container.

This can be done in docker-compose.yaml by defining the following for the service:

cap_add:
    - NET_ADMIN
devices:
    - "/dev/net/tun"
sysctls:
    - net.ipv6.conf.all.disable_ipv6=0
    - net.ipv4.ip_forward=1
    - net.ipv6.conf.all.forwarding=1
    - net.ipv6.conf.all.seg6_enabled=1
    - net.ipv6.conf.default.seg6_enabled=1

Author

Louis Royer

License

MIT