snort bsd wrote:
Never mind
it is the VLAN number. But which RFC define this?
I've never seen an IPv6 RFC specify to put the VLAN number in the link-local address. Thus this must be an (odd) choice made by some implementation. Perhaps the implementation somehow requires that all the link-local addresses for all its (sub)interfaces be unique, even though the RFCs assume that the implementation should be able to deal with multiple interfaces with same same link-local address. Erik
Thanks all
Dave
----- Original Message ---- From: snort bsd <snortbsd@yahoo.com.au> To: nanog@merit.edu; juniper-nsp <juniper-nsp@puck.nether.net> Sent: Monday, 28 January, 2008 3:05:59 PM Subject: IPv6 questions
Hi All:
With link-local IPv6 address, the converting from MAC-48 to EDU-64 address format (FF FE stuffing). How does the VLAN tags affect the conversion?
With the rule of FF FE stuffing, I can see clearly work on the ptp interfaces. But on those Ethernet based VLANs, it doesn't seem to follow that pattern:
Current address: 00:90:69:4a:b9:5d, Hardware address: 00:90:69:4a:b9:5d
well, i assume the link-local should be fe80::290:69ff:fe4a:b95d/64. actually, it shows:
Destination: fe80::/64, Local: fe80::290:6903:94a:b95d
how does the router get this 03 09 instead of ff fe?
Thanks all
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