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Date:	Mon, 23 Jul 2007 12:01:19 -0700
From:	Rick Jones <>
To:	Linux Network Development list <>
Subject: specifying scopid's for link-local IPv6 addrs

Folks -

People running netperf have reported that they have trouble with IPv6 under 
Linux.  Specifically, wereas the use of link-local IPv6 addresses "just works" 
in netperf under a number of "other OSes" they do not under Linux.  I'm 
ass-u-me-ing 2.6 here, but not sure exactly which ones - I've seen it on a 
2.6.18-based RHEL5.

Some poking about and conversation has suggested that one has to set a 
sin6_scope_id in the sockaddr_in6.  This needs to be an index of one of the 
interfaces in the system, which I presume means walking some additional structures.

Is this a requirement which might be expected to remain in the future, or is it 
something which might just go away?  That will have an effect on netperf future 


rick jones
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