number of sessions cisco pix can support

Unanswered Question
Feb 16th, 2009

Hi all. I would like to know how many network sessions including vpn sessions a cisco pix 515e device can support. I don't seem to be able to find the specifications of pix515e from the internet. Understand its EOL already. Pls advise, thks in advance.

I have this problem too.
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Syed Iftekhar Ahmed Mon, 02/16/2009 - 01:48

• Cleartext throughput: Up to 190 Mbps

• Concurrent connections: 130,000

• 168-bit 3DES IPSec VPN throughput: Up to 135 Mbps with VAC+ or 63 Mbps with VAC

• 128-bit AES IPSec VPN throughput: Up to 130 Mbps with VAC+

• 256-bit AES IPSec VPN throughput: Up to 130 Mbps with VAC+

• Simultaneous VPN tunnels: 2000

As per the following URL


Syed Iftekhar Ahmed

donnie Mon, 02/16/2009 - 17:08

Hi lftekhar,

Thk you for the url link.

Can i confirm if 2000 simultaneous vpn tunnels refer to capability of supporting 2000 simultaneous vpn connections to the firewall?

Syed Iftekhar Ahmed Mon, 02/16/2009 - 17:26

As per my understanding value 2000 means that 515E supports up to 2000 Security Associations, NOT individual tunnels.

Easch IPSEC tunnel has 3 SAs (IKE SA, Tx SA, Rx SA). Depending on how elaborate your access-lists are, these can

use additional SA's.

In summary there are approximately 5 to 7 SA's per tunnel in a typical


With assumption of 7 SAs per tunnel.The total comes to 285 unique tunnels.

Syed Iftekhar Ahmed


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