Well, we ran out of room there, so let's start with a fresh chalkboard and talk
about
VRRP versions.
Just like with HSRP, we have two different versions.
We have version 2 and version 3 that are both supported by Cisco.
And the big difference is that version 3 is going to add IPv6 support and it's
going
to also add the ability to use millisecond timers.
So same enhancement that we got by going from HSRP version 1 to HSRP version 2. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
So same enhancement that we got by going from HSRP version 1 to HSRP version 2.
Now if we're going to use IP version 6, then we're going to need a new multic
ast address
that uses IPv6.
And so the multicast address that's used is FF02 and then double colon 12.
Now remember, the IPv4 address ended with .18 and usually we like to keep the
same number,
so why are we using 12 here?
Well because 12 is a hexadecimal value and so if we translate hex back to WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
Well because 12 is a hexadecimal value and so if we translate hex back to
decimal, it
actually is 18.
So it is the same number.
We just have to translate it to hexadecimal and plug it into an IPv6 address.
So that's the extent of the conversation with the VRRP versions.
For the most part, we just want to use version 3 because we have the enhance
ments of IPv6
and millisecond timers and yes, version 3 does still support IP version 4.
And so we can enable VRRP version 3 and use IPv4 along with gaining the WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
And so we can enable VRRP version 3 and use IPv4 along with gaining the
enhancement of millisecond
timers at that point.
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