From: Kyle Galusha (kgalusha@xxxxxxxxx)
Date: Fri Feb 09 2001 - 12:00:29 GMT-3
12.0 does fastswitch
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/np1_c
/1cprt1/1cindep.htm#xtocid405514
Enable Fast-Switched Policy Routing
IP policy routing can now be fast-switched. Prior to this feature, policy
routing could only be process switched, which meant that on most platforms, the
switching rate was approximately 1,000 to 10,000 packets per second. This was
not fast enough for many applications. Users who need policy routing to occur
at faster speeds can now implement policy routing without slowing down the
router.
Fast-switched policy routing supports all of the match commands and most of the
set commands, except for the following restrictions:
The set ip default command is not supported.
The set interface command is supported only over point-to-point links,
unless a route-cache entry exists using the same interface specified in the set
interface command in the route map. Also, at the process level, the routing
table is consulted to determine if the interface is on a reasonable path to the
destination. During fast switching, the software does not make this check.
Instead, if the packet matches, the software blindly forwards the packet to
thespecified interface.
At 07:12 PM 2/9/2001 +1100, Darren Ward wrote:
>Hi All,
>
>Quick question.
>
>Does Policy Routing fast switch when used with route caching?
>
>I have a problem where in order to force remotes to send traffic to a
>second router I have to policy route with a forced next hop of the secod
>router to stop them being able to communicate with each other but
>access-lists would make the router process switch the traffic.
>
>Darren
>
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