From: ccie2be (ccie2be@nyc.rr.com)
Date: Mon Feb 14 2005 - 14:02:25 GMT-3
Hi Kinwai,
Thanks for getting back to me but you didn't clear up my problem.
Please see in-line comments.
----- Original Message -----
From: "kinwai" <kinwai@singnet.com.sg>
To: "ccie2be" <ccie2be@nyc.rr.com>
Cc: "Group Study" <ccielab@groupstudy.com>
Sent: Monday, February 14, 2005 11:51 AM
Subject: Re: ipv6 neighbor solicitation
> R1 will send a NS(ICMPv6 Type 135) to R2
> Source address of himself... destination will be a (Solicitied-note
mulitcast) which will copy the last 24 bits of the destination R2(or a
host?)
>
> When you want to send to R2 or any other host, you will know the
destination ipv6 address in the first place.
******************
How does host1 (or any sender) find out the ipv6 destination address of host
2 in the first place? I assume it's via DNS, but if so, how does host1 find
out the iv6 address of the DNS server if autoconfig is being used?
Thanks, Tim
********************
>
> Source mac address as usual. Destination mac will be a standard mac
address of 33:33:FF:01:00:0B.
>
> All the routers will listen to it and respond by default.
>
> sh ipv6 interface output
> -----
> GigabitEthernet0/1 is up, line protocol is up
> IPv6 is enabled, link-local address is FE80::201:FF:FE01:1
> Description: ***
> Global unicast address(es):
> 2001:1::1, subnet is 2001:1::/64
> Joined group address(es):
> FF02::1 (interface-local, link local level)
> FF02::2 (link-local, link local level )
> FF02::1:FF00:1 (solicated-node muliticast also,auto enable)
> FF02::1:FF01:1 (this is the one!!)
> ------
>
>
> --- ccie2be <ccie2be@nyc.rr.com> wrote:
>
> > Hi guys,
> >
> > I'm trying to understand the NS process used in ipv6 but so far, I
> > haven't
> > found a complete explanation.
> >
> > In particular, I know that when an ipv6 host wants to communicate
> > with another
> > ipv6 on the same local-link but doesn't have the address of that
> > other host,
> > it sends a Neighbor Solicitation message to that other host. For
> > this
> > message, it creates the destination ipv6 address by concatenating
> > the last 24
> > bits of the neighbor's ipv6 to a 104 bit multicast address.
> >
> > What I don't understand is from where would the host find it's
> > neighbor's ipv6
> > address? I assume for this it uses DNS, but how does it get the
> > ipv6 address
> > of the DNS server assuming it's using stateless autoconfiguration?
> >
> > If someone can explain this process, I would be greatly
> > appreciative.
> >
> > TIA, Tim
> >
> > _______________________________________________________________________
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