> In terms of resource allocation, it seems to me that you only have to
> deal with 32-bit numbers, and no distinction is necessary.
> In terms of presentation to an operator, e.g. as part of a "show"
> command, it also seems like whatever is simplest and easier on the
> eye wins.
> (I would note that on cisco routers it's perfectly possible to view
> community string attributes as simple 32-bit numbers, but everybody
> seems to prefer the representation of two 16-bit values separated by
> a colon.)
That's because a convention has evolved to structure the community as two
16-bit values, with specific semantic meanings attached to them.
Similarly, the dotted-quad notation for IP addresses once made sense because
class-A/B/C networks assigned structure to the octets.
IMHO, displaying 32-bit ASNs as "x.y" would be a mistake as it would imply
that some structure exists.
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