DX6 on Linux by uSID

The Linux come from by my compiled kernel that supports uSID, please check my last blog: Compile SRv6 uSID and VPP on ubuntu 20.04

Before doing SRv6 lab, please double confirm enable the function by following cmd:

sysctl -w net.ipv6.conf.all.forwarding=1
sysctl -w net.ipv4.conf.all.forwarding=1
sysctl -w net.ipv6.conf.all.seg6_enabled=1

Check by following cmd:

root@vm1:/home/cisco# sysctl -a |grep net.ipv6.conf.all.forwarding
net.ipv6.conf.all.forwarding = 1

Above cmd will disappear after reboot, you can permanently write to “/etc/sysctl.conf”.

Btw, how to config srv6 and usid, reference follows:

SRv6 uSID Linux Iproute2

SRv6 – Linux Kernel Implementation

Topology

Traffic: to VM2 from VM1; only show one direction as an example.

 

Config and Packages

VM1

ip -6 route add 2::/64 encap seg6 mode encap segs fccc:cc01:8001:8002:8003::,fccc:cc01:8004:e200:: dev ens4 metric 1
ip -6 route add default via 1::2

Server1

ip -6 route add fccc:cc01:8001::/48 encap seg6local action uN dev ens3
ip -6 route add fccc:cc01:8002::/48 via 2001:12::2

Server2

ip -6 route add fccc:cc01:8002::/48 encap seg6local action uN dev ens3
ip -6 route add fccc:cc01:8003::/48 via 2001:23::3

Server3

ip -6 route add fccc:cc01:8003::/48 encap seg6local action uN dev ens3
ip -6 route add fccc:cc01:8004::/48 via 2001:34::4

Server4

ip -6 route add fccc:cc01:8004::/48 encap seg6local action uN dev ens3 
ip -6 route add fccc:cc01:8004:e200:: encap seg6local action End.DX6 nh6 2::1 dev ens4 metric 1

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