[Isis-wg] draft-ietf-isis-traffic-01.txt

[Jeff Learman]

At 10:45 AM 10/10/99 -0700, Tony Li wrote:
>
>Don,
>
>|  > There's no reason that you can't run the traffic engineering TLVs in
>|  > parallel with the existing TLVs.
>|  It is an either/or situation though for the new 24 bit metric and the
old 6
>|  bit metrics, correct? 
>
>Not strictly.  You can run both.  If you do, you probably want to advertise
>the same value in the 24 bit metric as you do in the default 6 bit metric.
>You still get to append all of the TE subTLVs that we've specified, you
>just lose out on the dynamic range of the metric.

Earlier, I pointed out what I though was a problem with the 24-bit metrics,
namely, that MAX_PATH_METRIC increased from 1024 to a much larger value.

If you are running traffic engineering metrics in parallel with existing
TLVs, which value for MAX_PATH_METRIC should be used?  Must all routers
in the subdomain support the new TLVs before they are used at all,
to avoid routing loops that would occur if some paths exceed the smaller
MAX_PATH_METRIC?

Thanks,
Jeff

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  Jeff Learman                           Internet:     jjl@one.com
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