Robert,
On 18/11/2021 13:42, Robert Raszuk wrote:
[WAJ] In the scenarios that you mentioned, BGP nexthop reachability
is derived from the directed interface, there is no summary action
done by the router. Is that true?
Not necessarily - TORs do not always do eBGP to compute and set next hop
self. There can be IBGP session there and therefor next hop is not
changed all the way to the remote compute. But the point was that today
BGP is involved already in reachability and service distribution.
And while current IGP proposals can propagate this too the point is
about scalability when it comes to signalling of such massive failures
in the IGP. The amount of IGP traffic and processing in those moments
may be significant.
we can certainly address such case by not allowing thousands of pulses
to be generated in case half of the universe falls apart. That seems
obvious and easy to implement.
thanks,
Peter
And yes I agree this is not really a "hole punching" ... that was just a
description shortcut I used.
Thx,
R.
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