Now.
ICMP version six also includes neighbor discovery protocol messages and the two of interest here are
router solicitation or RC and router advertisement or a so router solicitation message is sent to all
IP version six routers.
In other words, if zero two Colon Colon two routers on the local segment will be subscribed to that
multicast address and they will reply back with router advertisements.
So what advertisements are sent by routers and include information such as the link local IP version
six address of the router and the local segment routers advertise themselves using multicast address
for zero two Colon Colon one, which is all devices on the local segment.
A host is an example will boot up and send a message to four zero to Colon Colon two to ask all routers
to identify themselves.
The routers will then reply back with their link local address.
Routers also send unsolicited rather advertisement messages, so on a periodic basis they will advertise
their details on the IP version six link and they send that again to 402 colon.
Colon one.
Now by leveraging neighbor discovery protocol or rather solicitation and errata advertisement messages
hosts can discover which subnet they belong to.
So routers by using Slack can advertise the local prefix and length to hosts on the local segment.
So let's have a look at that practically.