link avoidance

Steve Dodd steve.dodd at
Thu May 7 15:02:16 UTC 2015

On 5/6/15, 4:56 PM, "Randy Bush" <randy at> wrote:

>a fellow researcher wants
>    > to make the case that in some scenarios it is very important for a
>    > network operator to be able to specify that traffic should *not*
>    > traverse a certain switch/link/group of switches/group of links
>    > (that's true right?). Could you give some examples? Perhaps point
>    > me to relevant references?
>if so, why? security?  congestion?  other?  but is it common?  and, if
>so, how do you do it?

In the wireless backhaul space I¹ve seen carriers that would prefer a
circuit to go down rather than take the long path on a ring between tower
and switching center. I assume they are concerned with some sort of
latency requirement. We used RSVP-TE with link coloring as the solution.



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