Specifications
IP Switching Commands
mls cef maximum-routes
ISW-88
Cisco IOS IP Switching Command Reference
May 2008
Usage Guidelines
Note If you copy a configuration file that contains the multilayer switching (MLS) Cisco Express Forwarding
maximum routes into the startup-config file and reload the Cisco
7600 series router, the Cisco 7600
series router reloads after it reboots.
This command is not supported on Cisco 7600 series routers that are configured with a Supervisor
Engine
2.
The mls cef maximum-routes command limits the maximum number of the routes that can be
programmed in the hardware. If routes are detected that exceed the limit for that protocol, an exception
condition is generated.
The XL and non-XL modes are based on the type of Policy Feature Card (PFC) or Distributed
Forwarding Card (DFC) module that is installed in your system. You cannot configure the mode except
by the installed hardware.
The XL-mode systems are configured with the following modules:
• WS-F6K-PFC3BXL
• WS-F6K-DFC3BXL
• WS-F6700-DFC3BXL
The non-XL mode systems are configured with the following modules:
• WS-F6K-PFC3A
• WS-F6K-DFC3A
• WS-F6700-DFC3A
The valid values for the maximum-routes argument depend on the system mode—XL mode or non-XL
mode. The valid values are as follows:
• XL mode
–
IP and MPLS—Up to 1,007,000 routes
–
IP multicast and IPv6—Up to 503,000 routes
• Non-XL mode
–
IP and MPLS—Up to 239,000 routes
–
IP multicast and IPv6—Up to 119,000 routes
Note The maximum values that you are permitted to configure is not fixed but varies depending on the values
that are allocated for other protocols.
An example of how to enter the maximum routes argument is as follows:
mls cef maximum-routes ip 4
where 4 is 4096 IP routes (1024 x4 = 4096).
The new configurations are applied after a system reload only and do not take effect if a switchover
occurs.
In RPR mode, if you change and save the maximum-routes configuration, the redundant supervisor
engine reloads when it becomes active from either a switchover or a system reload. The reload occurs
5
minutes after the supervisor engine becomes active.