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Re: [DNA-BOF] Replacement term for L3 Link?
Dear Greg
I prefer to keep using '(L3) link' in the sense defined in 'RFC 2461' as below.
link - a communication facility or medium over which nodes can
communicate at the link layer, i.e., the layer
immediately below IP.
As mentioned, 'link' is an entrenched term, for example, in 'link-local scope' or
'on-link prefix'.
I am afraid it will be too much trouble to adopt a new term. Moreover with a
new term, we may bring another confusion. That may make matters worse.
IMHO, we'd better keep using the term '(L3) link' with care.
To prevent folks from confusion, we may explain the difference between
'L3 link' and 'L2 link' in terminology I-D as below.
Allow me to delve into detail a little and kindly find the following example.
Assume two 802.11 b APs are one the same ethernet link and share one
AR like below.
|
__|____
| |
| AR |
|___ __|
__________|__________________ _____
| |
__|__ __ |__
| AP1 | | AP2 |
|____ | |___ _|
In the above example, there are three L2 links, one ethernet link and two 802.11 b
links. But they are connected with bridges(AP) to form one link. Any two nodes
attached to the APs can communicated at the link layer.
But if a node moves from AP1 to AP2, there is a L2 link change. It should change
its AP association and BSS ID.
Hence when a node moves from AP1 to AP2, there is a L2 link change but not
a link change.
A little tricky but I can live with it. :-)
Best Regards
JinHyeock Choi