Configure IPv6 addresses and perform basic IPv6 troubleshooting

By | October 4, 2018
Task

configure a static IPV6 address in system1 as fddb:fe2a:ab1e::c0a8:64/64.
configure a static IPV6 address in system2 as fddb:fe2a:ab1e::c0a8:02/64.

Previously we setup network teaming . We will use teaming setup and extend our configuration

System1.example.local

#nmcli connection modify team01 ipv6.addresses fddb:fe2a:ab1e::c0a8:64/64 ipv6.method manual

From console

#systemctl restart network

Verify

#ip a s

Repeat same steps for system1.example.local

#nmcli connection modify team01 ipv6.addresses fddb:fe2a:ab1e::c0a8:02/64 ipv6.method manual

From console

#systemctl restart network

Verify

#ip a s

Testing.
System1.example.local

#ping6  fddb:fe2a:ab1e::c0a8:02
#ping6 fddb:fe2a:ab1e::c0a8:64

System2.example.local

#ping6  fddb:fe2a:ab1e::c0a8:02
#ping6 fddb:fe2a:ab1e::c0a8:64

Duplicate Address Detectiod (DAD)
Restart both the machines.

# ip a s

If you see tentative dad failed With ipv6 , then follow these steps.

# sysctl -a | grep accept_dad

Disable DAD on the teamed interface:

#vi /etc/sysctl.d/accept_dad.conf
net.ipv6.conf.myteam.accept_dad=0

Reboot the machines. All should be OK after reboot.

Video Explanation
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