What is a link-local address?? WAS: Re: JUNOS forwards IPv6 link-local packets

William Herrin bill at herrin.us
Mon May 7 12:56:13 UTC 2012

On 5/6/12, Matthew Petach <mpetach at netflight.com> wrote:
> Which way do *you* vote?

Hi Matthew,

Cisco routers forward packets for unless explicitly
configured not to, treating it like any other unicast address.

Linux load balancers require a special kernel patch to also use them
as routers because the kernel authors failed to conceive of a
situation where accepting an external packet with a source address
matching a configured interface address was, in fact, a correct thing
to do.

I vote for the Cisco approach. It has occasionally quirky results but
it's also flexible enough to handle situations the protocol designers
didn't conceive of.

Bill Herrin

William D. Herrin ................ herrin at dirtside.com  bill at herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004

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