From: kinwai (kinwai@singnet.com.sg)
Date: Mon Feb 14 2005 - 13:51:02 GMT-3
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.
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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