[ECOS] IPv6 Link Local Address - Link ID?
Fri Apr 18 20:29:00 GMT 2008
When I add a new link local address using SIOCAIFADDR_IN6, the
in6_control() function sets a Link ID (3rd and 4th bytes) equal to the
interface index. Using ioctl with SIOCGIFCONF after setting the address,
I see that the link local address has this Link ID part set to 0x0001.
The problem is that from another machine, I cannot ping the link local
address that has the Link ID set, but only the original link local
address I intended to program to the stack. Maybe the Link ID part of
the link local address is only for internal use within the stack?
Another issue is with the Link ID itself - why is it needed and where is
it being used? If there is more than one interface, each interface
should be given its own MAC address, and therefore the device should
generate different link local addresses for each interface. There should
be no need to add a separate field in the link local address to
differentiate between interfaces, if that is what it is for.
Thanks in advance,
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
More information about the Ecos-discuss