Cisco – what cause sfp not inserted in a cisco 5596

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what cause sfp not inserted in a cisco 5596? I have already swapped sfp to verify not a bad sfp. when I do a sh transciever command it shows tansceiver present.

Best Answer

Is it a 1G SFP and not a 10G SFP+? You need to set the speed for the 55xx switches to step down to 1G speeds.

Otherwise it could be a non-Cisco SFP and you need to enable support for it.

Related Solutions

Cisco – Code to generate Cisco “secret” password hashes

As per this website, the OpenSSL command line utility appears to provide the functionality you need:

$ openssl passwd -1 -salt pdQG -table foobar
foobar  $1$pdQG$0WzLBXV98voWIUEdIiLm11
$

And there is presumably an equivalent function in the library itself.

I'm not sure if IOS requires you to use specific salt values, but technically there is no reason why it should as long as the string you provide in your 'enable secret' command is a valid MD5 password digest. If you have the opportunity to test, I'd be interested to know your results.

Cisco – Mixing SFP’s with different speeds

If I installed Cisco GLC-SX-MM 1000Base SFP's, would that cause an issue if the other end of that fiber was connected to a 100Base SFP? Or do I need to have matching speeds on both ends?

Your speeds must match

Best Answer

Related Solutions

Cisco – Code to generate Cisco “secret” password hashes

Cisco – Mixing SFP’s with different speeds

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