02-18-2003 11:06 AM - edited 03-02-2019 05:10 AM
hi,
i have a c1760 router on which i use a route-map to set the ip-prec-bit for
incomming traffic on an ethernet-interface.
!
route-map set_ip_prec permit 10
match ip address voip
set ip precedence critical
!
route-map set_ip_prec permit 20
match ip address premium
set ip precedence flash-override
!
route-map set_ip_prec permit 30
match ip address gold
set ip precedence flash
!
now i want that the input-queue of this ethernet interface does random-dedect regarding the ip-prec bit.
that means if there are pakets arriving with ip-prec=0 (for example sql-slimer akets) that these pakets are droped before pakets with ip-prec=1 .
a.) so does this router mark the pakets with the ip-prec and does then the random-dedect or vize-versa
b.) is it possible to do random dedect on incomming pakets ???
c.) any idea how i can limit traffic from "unknown" pakets (which could be a attack) iin a way that my router does not go out of performance ????
thanks for any idea !!!
02-25-2003 08:15 AM
Input classification is not supported for non-IP protocols. No input scheduling algorithm is supported on the input besides First In, First Out (FIFO).
For more details please refer the URL.
Quality of Service on Layer 3 Catalyst Switches/Modules Frequently Asked Questions
http://www.cisco.com/en/US/products/hw/switches/ps606/products_qanda_item09186a00800a8922.shtml
02-25-2003 09:48 AM
As far as C) goes you could try using the Modular QoS CLI and CBWFQ instead of the route-maps.
Define classes to match traffic and set the precedences, and then set a default traffic class for anything you havent defined and police/shape that.
CBWFQ works with CEF so the performance hit shouldnt be too much (in fact it may be faster than the route-map)
If you want to control A) you could match and set the prec on the input to the router, and then random-detect on the output (or vice versa should you wish)
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