Date: Wed, 02 Oct 2002 09:33:44 -0700
From: Mukesh Gupta <[EMAIL PROTECTED]>
Message-ID: <[EMAIL PROTECTED]>
| Is it required to have a link local address on a tunnel interface. I am
| implementing IPv6 in IPv6 tunnels and wanted to know whether I should
| install a link local address on the tunnel interface. Is there any
| document that talks about this ?
Yes, the addr arch doc requires LL addresses on every interface
(and that includes tunnels).
| If it is required, how should I calculate a unique link local address ?
However you like I think. But one common method is to use the underlying
tunnel address to form the IID. For v6 in v6, you could use the IID of
the underlying v6 interface (or any v6 interface). Or the low N bits of
that where N is 128 - the prefix length of the tunnel.
kre
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