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SSL_do_handshake() failed (SSL: error:141A318A:SSL routines:tls_process_ske_dhe:dh key too small) while SSL handshaking to upstream
Can you update the SSL configuration to use a larger DH key? Many SSL libraries won't connect with a 1024 bit key anymore due to the logjam vulnerability.
I don't have any switches configured with internet access in general, but I connected one to run an SSL diagnosis (https://www.ssllabs.com/ssltest/) while trying to figure this out, and the report was not good. You sell enough switches that I'm sure there are people out there who do assign publicly routable addresses to their devices, so maybe updating to a current SSL library is warranted?