an additional linecard is still several k$, money which could be better spent on more servers, i think.
Fair enough, I didn't think to would be that expensive, $100 at most.
over the next few months some changes will be made to the network setup at knams, which might make it easier to provide some additional redundancy without spending so much (because we will no longer connect the entire toolserver to the main Wikimedia switch).
Sounds good. Thanks for the clarification
Simon