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Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter 4 Managing Feature Licenses
Supported Feature Licenses Per Model
Intercompany Media
Engine
When you enable the Intercompany Media Engine (IME) license, you can use TLS proxy sessions
up to the configured TLS proxy limit. If you also have a Unified Communications (UC) license
installed that is higher than the default TLS proxy limit, then the ASA sets the limit to be the UC
license limit plus an additional number of sessions depending on your model. You can manually
configure the TLS proxy limit using the tls-proxy maximum-sessions command or in ASDM,
using the Configuration > Firewall > Unified Communications > TLS Proxy pane. To view the
limits of your model, enter the tls-proxy maximum-sessions ? command. If you also install the
UC license, then the TLS proxy sessions available for UC are also available for IME sessions. For
example, if the configured limit is 1000 TLS proxy sessions, and you purchase a 750-session UC
license, then the first 250 IME sessions do not affect the sessions available for UC. If you need
more than 250 sessions for IME, then the remaining 750 sessions of the platform limit are used
on a first-come, first-served basis by UC and IME.
• For a license part number ending in “K8”, TLS proxy sessions are limited to 1000.
• For a license part number ending in “K9”, the TLS proxy limit depends on your configuration
and the platform model.
Note K8 and K9 refer to whether the license is restricted for export: K8 is unrestricted, and K9
is restricted.
You might also use SRTP encryption sessions for your connections:
• For a K8 license, SRTP sessions are limited to 250.
• For a K9 license, there is no limit.
Note Only calls that require encryption/decryption for media are counted toward the SRTP
limit; if passthrough is set for the call, even if both legs are SRTP, they do not count toward
the limit.
Interfaces of all types,
Max.
The maximum number of combined interfaces; for example, VLANs, physical, redundant, bridge
group, and EtherChannel interfaces.
IPS Module For failover pairs, both units need an IPS module license.
Other VPN Other VPN sessions include the following VPN types:
• IPsec remote access VPN using IKEv1
• IPsec site-to-site VPN using IKEv1
• IPsec site-to-site VPN using IKEv2
This license is included in the Base license.
Total VPN (sessions),
combined all types
• Although the maximum VPN sessions add up to more than the maximum VPN AnyConnect
and Other VPN sessions, the combined sessions should not exceed the VPN session limit. If
you exceed the maximum VPN sessions, you can overload the ASA, so be sure to size your
network appropriately.
• If you start a clientless SSL VPN session and then start an AnyConnect client session from
the portal, 1 session is used in total. However, if you start the AnyConnect client first (from
a standalone client, for example) and then log into the clientless SSL VPN portal, then
2 sessions are used.
Table 4-15 License Notes (continued)
License Notes