@brcruz001 hello,
What this tells us, a 2901's performance is very variable - much depends on your config and the nature of your traffic.
To obtain the maximum forwarding performance out of a ISR you'll want to use the minimal possible configuration.
For example, if you're using a dynamic protocol like EIGRP, replacing it with static routes would save a few CPU cycles, that can be used for forwarding packets. (Oh, and the fewer routes, the better to. For example, using a default for all off-site routes.)
Not using any ACLs, also saves CPU cycles.
Deactivating CDP should save a few CPU cycles.
Deactivating NTP should save a few CPU cycles.
Etc., etc., etc.
However, before you go down the road trying to saving a microsecond of CPU here or there, yes, you'll want to insure items like CEF are enabled and/or your buffer management is optimal, i.e. all hits without buffer list trims/creates, etc. And/or, you might want to minimize hitting up this router with SNMP queries, etc., etc.
Again, the closer the config is to only doing basic packet forwarding, you'll maximize the ISR's performance.
Here original post:
https://community.cisco.com/t5/switching/2901-router-throughput-increase/td-p/3011864
Jaderson Pessoa
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