[c-nsp] Commited Access Rate on dot1q subif on Cisco 7500

Mihai CHELARU kefren at netbastards.org
Thu Oct 7 11:26:44 EDT 2004


I had around 40 input and 40 output, iirc. The performance was highly 
deteriorated. Even with a few (5-10) the performance is bad. Keep in mid 
that you got to rate-limit your clients as distributed as possible in 
order to avoid this kind of situations.

> Hi,
> I was looking on a document from Cisco regarding Commited Access Rate
> (http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/qos_c/qcpart1/qccar.htm).
> It says here that:
> "The rate policies can be independent; each rate policy deals with a
> different type of traffic. Alternatively, rate policies can be
> cascading; a packet can be compared to multiple different rate
> policies in succession. You can configure up to 20 rate policies on a
> subinterface."
> ... but they don't say what happens if you add more.
> We have, in production, more than 25 rate policies on one
> subinterface, and it seems to work.
> Has anyone had problems with more that 20 rate policies on a subif?

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