VPN Throughput 225Mb/s / # of VPNs?

Unanswered Question
Feb 3rd, 2008

Per the datasheet below Cisco states that you can up to 750 VPNs configured on an ASA 5520 with 225Mb/s throughput. What throughput can you expect as you add VPNs on the outside interface? Would it be 225Mb/s divided by the number of VPNs you put on that outside interface or can you get 225Mb/s sustained for each VPN?

Cisco ASA 5520 Adaptive Security Appliance Platform Capabilities and Capacities



Firewall Throughput

Up to 450 Mbps

Concurrent Threat Mitigation Throughput (firewall + IPS services)

• Up to 225 Mbps with AIP SSM-10

• Up to 375 Mbps with AIP SSM-20

VPN Throughput

Up to 225 Mbps

Concurrent Sessions


IPsec VPN Peers


SSL VPN Peer License Levels*

10, 25, 50, 100, 250, 500, or 750

Security Contexts*

Up to 20


4 Gigabit Ethernet ports and 1 Fast Ethernet port

Virtual Interfaces (VLANs)



VPN clustering and load balancing

High Availability

Active/Active, Active/Standby

* Separately licensed feature; includes two with base system

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
irisrios Fri, 02/08/2008 - 10:26

If you try establishing more than 750 VPNs , which is the maximum VPNs possible it will drop those connections. But I have not tried it practically.


This Discussion