Gyan,
On 02/10/2020 18:30, Gyan Mishra wrote:
All,
With SRv6 and IP based flex algo a generic question as it applies to
both. Is it possible to have within a single IGP domain different sets
of nodes or segments of the network running different algorithms.
absolutely.
From
both drafts it sounds like all nodes have to agree on same algorithm
similar to concept of metric and reference bandwidth all have to have
the same style metric and play to the same sheet of music.
all participating nodes need to agree on the definition of the flex-algo
and advertise the participation. That's it.
If there was
a way to use multiple algorithms simultaneously based on SFC or services
and instantiation of specific algorithm based on service to be
rendered. Doing so without causing a routing loop or sub optimal
routing.
you can certainly use multiple algorithms simultaneously and use algo
specific paths to forward specific traffic over it. How that is done
from the forwarding perspective depends in which forwarding plane you
use. Flex-algo control plane is independent of the forwarding plane.
I thought with flex algo that there exists a feature that on
each hop there is a way to specify which algo to use hop by hop similar
to a hop by hop policy based routing.
no, there is no hop-by-hop classification, that is problematic and does
not scale for high speeds. Classification is done at the ingress only.
thanks,
Peter
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