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
CirrostratusI opened a support case and they confirmed it's been reported by a few customers and is likely a bug. The suggested work-around is put !AES-GCM in the cipher string.
Another work-around I discovered was prefer 256-bit AES over 128-bit. The major browsers don't support 256-bit AES-GCM, so they'll negotiate regular AES and essentially you'll never see the issue.