Hi All,
During my studies about QFX-5100-48T virtual chassis I noted that there is a kind of lack in the documentation about the switch over-subscription's topic.
The 2 sets of built-in interfaces on QFX-51000-48T, 48 10GbE (connecetd to end hosts) and 6 40GB (uplink) can offer a switch-oversubscritpion of 2:1, (480Gb : 240Gb). So far so good.
Jumping now on virtual-chassis topic (please note I am not talking about virtual chassis fabric)I further read that the traffic going from one switch to another in a ring topology is subject to nondeterministic over-subscription, depending on how many devices are between the source and the destination.
My question now is: how can I compute the switch over-subscription in case of a virtual-chassis with 10 Node's members?
If the books mentions non-deterministic over-subscription, is it really impossible to analise or plan the performance, in terms of over-subscription?
Thanks for reading my doubts.