Hi Robert,
On 30/11/2021 12:40, Robert Raszuk wrote:
Hey Peter,
> #1 - I am not ok with the ephemeral nature of the advertisements. (I
> proposed an alternative).
LSPs have their age today. One can generate LSP with the lifetime of 1
min. Protocol already allows that.
That's a pretty clever comparison indeed. I had a feeling it will come
up here and here you go :)
But I am afraid this is not comparing apple to apples.
In LSPs or LSA flooding you have a bunch of mechanisms to make sure the
information stays fresh
and does not time out. And the default refresh in ISIS if I recall was
something like 15 minutes ?
yes, default refresh is 900 for the default lifetime of 1200 sec. Most
people change both to much larger values.
If I send the LSP with the lifetime of 1 min, there will never be any
refresh of it. It will last 1 min and then will be purged and removed
from the database. The only difference with the Pulse LSP is that it is
not purged to avoid additional flooding.
Today in all MPLS networks host routes from all areas are "spread"
everywhere including all P and PE routers, that's how LS protocols
distribute data, we have no other way to do that in LS IGPs.
Can't you run OSPF over GRE ? For ISIS Henk had proposal not so long ago
to run it over TCP too.
https://datatracker.ietf.org/doc/html/draft-hsmit-lsr-isis-flooding-over-tcp-00
you can run anything over GRE, including IGPs, and you don't need TCP
transport for that. I don't see the relevance here. Are you suggesting
to create GRE tunnels to all PEs that need the pulses? Nah, that would
be an ugly requirement.
thanks,
Peter
Seems like a perfect fit !
Thx,
R.
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