Yevgeny Kliteynik wrote:
Hi Sasha,
Sasha Khapyorsky wrote:
On 13:09 Wed 04 Nov , Yevgeny Kliteynik wrote:
This patch implements connect_switches option in up/down
routing. Also, connect_roots is now handled as a special
case of connect_switches.
The idea is the following: when clearing hops, preserve
the entries for switches that are above the highest leaf
in the tree.
So if the highest leaf in the tree has rank N, preserve
hops to all the switches with ranks 0 to (N-1).
When connecting roots (--connect_roots option), just set
N to 1.
Would this affect multicast routing in sense of a credit loop
generation?
Since I sent these patches, I had it running in various
simulations and setups, and there are couple of fundamental
issue with this approach. Basically, what I did here (in up/dn)
is wrong. Not only for multicast, but for unicast too.
It interferes with the usual up/down paths routing.
I will issue V3 of the patches, and it will be only
connect_roots implementation for fat-tree with the
two small remarks that you found.
It won't be V3 - it's just one patch that implements
connect_roots in ftree routing.
-- Yevgeny
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