From: Alexandre Ribeiro (alexandregomesribeiro@gmail.com)
Date: Thu Jan 17 2008 - 09:44:48 ARST
Hi,
You need to place both mappings, since OSPFv3 or RIPng will use the link
local address as the source address for link local scope multicasts.
In the scenario that you presented you only need one broadcast statement,
since both IPv6 addresses map to the same DLCI. If a multicast or broadcast
packet arrives to a FR router, the router searches for the map statements
that have the broadcast keyword and sends a packet to each circuit specified
on those map statements. On the presented scenario, if you placed two
broadcast statements, the router would send the same multicast packet twice
to that DLCI.
Alex
On Jan 15, 2008 12:25 AM, Mick Vaites <mick@pobox.net.uk> wrote:
> Hi all,
>
> I am puzzling over which is correct and which is not.
>
> It is necessary to put in L2 / L3 mappings for both the actual IPv6
> addressing as well as the lnik local addresses but which gets the
> broadcast statement?
>
> Senario: two routers connected for IPv6, R1 and R5 over a frame-relay
> cloud, network is 2001:cc1e:5:15::x/64 and the DLCI's are 105 and 501
> respectively. This are the possible snippets for R1. (apologies for any
> obvious typos).
>
> I am wondering which is right
>
> !R1
> Interface Serial 1/0
> ipv6 address 2001:cc1e:5:15::1/64
> ipv6 address fe80::1 link-local
> frame-relay map ipv6 fe80::5 105 broadcast <---- broadcast on the
> link-local
> frame-relay map ipv6 2001:cc1e:5:15::5 105
>
> or
>
> !R1
> Interface Serial 1/0
> ipv6 address 2001:cc1e:5:15::1/64
> ipv6 address fe80::1 link-local
> frame-relay map ipv6 fe80::5 105
> frame-relay map ipv6 2001:cc1e:5:15::5 105 broadcast <----- broadcast
> on the main IP
>
> I have tried both of these senarios and both work okay ?
>
> Best regards
>
> Mick
>
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