Hi
I think it support up to 255 IPsec tunnels with security license.
IPsec traffic is restricted on the
Cisco ISR 4451-X. The router has the sa
me IPsec functionality as a Cisco ISR
G2. The default behavior of the router will be as follows (unless an HSECK9 license is installed):
•
If the limit of 225 concurrent IPsec tunnels is exceeded, no more tunnels are allowed and the
following error message appears:
%CERM-4-TUNNEL_LIMIT: Maximum tunnel limit of 225 reached for Crypto functionality
with securityk9 technology package license
This link could be useful:
http://www.cisco.com/c/en/us/td/docs/routers/access/4400/release/notes/isr4451rn.pdf
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