netgroup/p4-srv6

IPv6 Segment Routing SRv6

SRv6 is a network architecture that encodes a list of instructions in the IPv6 packet header to define a network wide packet processing program.
Each instruction defines a node to process the packet and the behavior to be applied to that packet by that node.
The SRv6 network programming framework is being defined in IETF.

Implementation

In the project we provide an open source data plane of SRv6 in P4. We Leverage the Open Network Operating System (ONOS) for the control plane.
We augmented ONOS implementation with the necessary extensions to support SRv6.

This work is done as part of the Research on Open SRv6 Ecosystem (ROSE) project.

This work is based on the P4 tutorial by the Open Networking Foundation. For more information about the above listed software modules you can visit the Open Networking Foundation original repository.

There you can also find useful material like the slides explaining the tutorial and a prepared Ubuntu virtual machine with all the software installed. It is strongly recommended to download the prepared VM and run the DEMO inside it, as it contains the several dependencies needed to run the software.

Repository structure

This repository is structured as follows:

• app/ ONOS app Java implementation
  
• config/ configuration files
  
• mininet/ Mininet script to emulate a topology of stratum_bmv2 devices
  
• p4src/ P4 implementation
  
• test/ test packets
  
• utils/ utilities include docker file
  

Usage

TBD

p4-srv6's Issues

Routing Tables Setup Fails

When running "onos-cli> source /config/routing_tables.txt" all commands inside the file fail with the same warning.

An example:
"route-insert device:r1 2001:1:1::1 128 00:00:00:00:00:10" created log =>

onos | 16:46:41.439 WARN [WriteResponseImpl] Unable to INSERT table entry on device:r1: OTHER_ERROR INVALID_ARGUMENT Cannot provide direct action for indirect table 33612857 (:3) [PiTableEntry{tableId=IngressPipeImpl.routing_v6, matchKey={hdr.ipv6.dst_addr=0x20010001000100000000000000000001/128}, tableAction=IngressPipeImpl.set_next_hop(next_hop=0x10), priority=N/A, timeout=PERMANENT}]

end function on last host with inline srv6 option

Hi,

I have four hosts with a srv6 inline route.
Host 1 (RAN) -> ip -6 route add fc00::4 encap seg6 mode inline segs fcf0:12::100,fcf0:23::6006 dev enp0s8
Host 2 (NVF1) -> ip -6 route add fcf0:12::100 encap seg6local action End dev enp0s8
Host 3 (NVF2) -> ip -6 route add fcf0:23::6006 encap seg6local action End dev enp0s8
Host 4 (UPF) -> ip -6 route add fc00::4 encap seg6local action ???

If i ping host 4 from host 1, this packet pass through host 2 and 3, and then stop at host 4 with segment left=0 and destination address = fc00::4, that is correct. But I dont know how to desencapsute this packet. .

Below, the complete settings.

#######################
host_1 (RAN)#####

#######################
ip link set dev lo up
ip -6 addr add fc00::1/64 dev enp0s8
ip link set dev enp0s8 up
ip -6 neigh add fc00::2 lladdr 00:00:00:00:00:02 nud permanent dev enp0s8
ip -6 neigh add fc00::3 lladdr 00:00:00:00:00:03 nud permanent dev enp0s8
ip -6 neigh add fc00::4 lladdr 00:00:00:00:00:04 nud permanent dev enp0s8
sudo sysctl -w net.ipv6.conf.all.seg6_require_hmac=-1
sudo sysctl -w net.ipv6.conf.all.accept_source_route=1
sudo sysctl -w net.ipv6.conf.all.forwarding=1
sudo sysctl -w net.ipv6.conf.enp0s8.seg6_require_hmac=-1
sudo sysctl -w net.ipv6.conf.enp0s8.seg6_enabled=1
sudo sysctl -p

ip -6 route add fcf0:12::100 via fc00::2
ip -6 route add fc00::4 encap seg6 mode inline segs fcf0:12::100,fcf0:23::6006 dev enp0s8

##################
host_2

##################
ip link set dev lo up
ip -6 addr add fc00::2/64 dev enp0s8
ip link set dev enp0s8 up
ip -6 neigh add fc00::1 lladdr 00:00:00:00:00:01 nud permanent dev enp0s8
ip -6 neigh add fc00::3 lladdr 00:00:00:00:00:03 nud permanent dev enp0s8
ip -6 neigh add fc00::4 lladdr 00:00:00:00:00:04 nud permanent dev enp0s8
sudo sysctl -w net.ipv6.conf.all.seg6_require_hmac=-1
sudo sysctl -w net.ipv6.conf.all.accept_source_route=1
sudo sysctl -w net.ipv6.conf.all.forwarding=1
sudo sysctl -w net.ipv6.conf.enp0s8.seg6_require_hmac=-1
sudo sysctl -w net.ipv6.conf.enp0s8.seg6_enabled=1
sudo sysctl -p
ip -6 route add fcf0:23::6006 via fc00::3
ip -6 route add fcf0:12::100 encap seg6local action End dev enp0s8

##################
host_3

##################
ip link set dev lo up
ip -6 addr add fc00::3/64 dev enp0s8
ip link set dev enp0s8 up
ip -6 neigh add fc00::1 lladdr 00:00:00:00:00:01 nud permanent dev enp0s8
ip -6 neigh add fc00::2 lladdr 00:00:00:00:00:02 nud permanent dev enp0s8
ip -6 neigh add fc00::4 lladdr 00:00:00:00:00:04 nud permanent dev enp0s8
sudo sysctl -w net.ipv6.conf.all.seg6_require_hmac=-1
sudo sysctl -w net.ipv6.conf.all.accept_source_route=1
sudo sysctl -w net.ipv6.conf.all.forwarding=1
sudo sysctl -w net.ipv6.conf.enp0s8.seg6_require_hmac=-1
sudo sysctl -w net.ipv6.conf.enp0s8.seg6_enabled=1
sudo sysctl -p
ip -6 route add fcf0:23::6006 encap seg6local action End dev enp0s8
ip6tables -t mangle -A POSTROUTING -p icmpv6 --icmpv6-type redirect -j DROP

##################
host_4

##################
ip link set dev lo up
ip -6 addr add fc00::4/64 dev enp0s8
ip link set dev enp0s8 up
ip -6 neigh add fc00::1 lladdr 00:00:00:00:00:01 nud permanent dev enp0s8
ip -6 neigh add fc00::2 lladdr 00:00:00:00:00:02 nud permanent dev enp0s8
ip -6 neigh add fc00::3 lladdr 00:00:00:00:00:03 nud permanent dev enp0s8
sudo sysctl -w net.ipv6.conf.all.seg6_require_hmac=-1
sudo sysctl -w net.ipv6.conf.all.accept_source_route=1
sudo sysctl -w net.ipv6.conf.all.forwarding=1
sudo sysctl -w net.ipv6.conf.enp0s8.seg6_require_hmac=-1
sudo sysctl -w net.ipv6.conf.enp0s8.seg6_enabled=1
sudo sysctl -p

ip -6 route add fc00::4 encap seg6local action ???