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New Member

Unable to collect sufficient entropy?

We recently upgraded all our 2960 switches to IOS 15.2.  Now on all the switches, we get this alert about 5 times an hour from each switch.  What does this mean?

%ENTROPY-0-ENTROPY_ERROR: Unable to collect sufficient entropy

Cisco Employee

Its an BUG.Cant disclose this

Its an BUG.

Cant disclose this over public , I request you to kindly log a TAC case and get the resolution for the same.



*Plz rate if this info is helpfull.

I am fascinated!  It did

I am fascinated!  It did sound a bit "random" ;-)

New Member

I get the same problem, but

I get the same problem, but only on one switch out of four. In my case, the four switches are 3560-X that are licensed for IPBASE and are running 15.2.(2).

The four switches have nearly identical configurations aside from VLAN numbers and IPv4 addresses, which makes me wonder if I missed something on the one switch giving me trouble.

If this can't be disclosed, I too will submit a TAC request. Strike that; installing the NOMACSEC version of the software eliminated this for me. Our environment doesn't support wired 802.1x authentication anyway, never mind MACSEC, so the switch doesn't need to gather entropy for MACSEC encryption.