Forum Discussion
John_Heyer_1508
Cirrostratus
CirrostratusCPU Increase when enabling AES-GCM
Supposedly AES-GCM should be the "best" cipher right now in terms of efficiency, however I noticed when enabling it on the F5, CPU goes up significantly. This is on a Viprion 2100 blade, 11.5.1 HF6....
John_Heyer_1508Cirrostratus
CirrostratusLooks like this did get fixed. We're on 11.6.1 HF2 now and I see no noticeable CPU increase with this cipher string, which should result in the vast majority of handshakes going SHA256 or SHA384
ECDHE+AES-GCM:ECDHE+AES:RSA+AES+SHA:RSA+3DES
I'm thinking it may have been back in 11.6.0 HF5, which fixed this bug:
491030-6 : Nitrox crypto accelerator can sometimes hang when encrypting SSL records