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hi to everyone,

i have problems regarding rate-limt:

i have a fast-ethernet on a 1760 router, on which i configured rate-limit:


interface FastEthernet0/0

description Ethernet 0/0

ip address

rate-limit input 128000 1500 2000 conform-action transmit exceed-action drop

ip route-cache policy

ip policy route-map set_ip_prec

load-interval 30

speed 100


no snmp trap link-status

no cdp enable


then i connected a traffic-generator and startet to forward traffic with 12mb/s to

the routers fast-ethernet.

i thougt the maximum inputrate can be 128000 b/s.


r-grztr2#sh int fastEthernet 0/0

FastEthernet0/0 is up, line protocol is up

Hardware is PQUICC_FEC, address is 0007.8580.65a5 (bia 0007.8580.65a5)

Description: Ethernet 0/0

Internet address is

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

reliability 255/255, txload 1/255, rxload 30/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 100Mb/s, 100BaseTX/FX

ARP type: ARPA, ARP Timeout 04:00:00

Last input 00:00:01, output 00:00:00, output hang never

Last clearing of "show interface" counters 00:32:21

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue :0/40 (size/max)

30 second input rate 12000000 bits/sec, 25000 packets/sec

30 second output rate 0 bits/sec, 0 packets/sec

31160197 packets input, 3993302007 bytes

Received 260 broadcasts, 0 runts, 0 giants, 0 throttles

5 input errors, 0 CRC, 0 frame, 5 overrun, 0 ignored

0 watchdog

0 input packets with dribble condition detected

1027 packets output, 85808 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out


any idea ???????

sh ver:


r-grztr2#sh ver

Cisco Internetwork Operating System Software

IOS (tm) C1700 Software (C1700-SY-M), Version 12.2(11)T, RELEASE SOFTWARE (fc1)

TAC Support:

Copyright (c) 1986-2002 by cisco Systems, Inc.

Compiled Wed 31-Jul-02 11:25 by ccai

Image text-base: 0x80008124, data-base: 0x80A7BF8C

ROM: System Bootstrap, Version 12.2(4r)XL, RELEASE SOFTWARE (fc1)

r-grztr2 uptime is 43 minutes

System returned to ROM by reload at 13:41:22 MEZ Fri Feb 21 2003

System restarted at 13:42:22 MEZ Fri Feb 21 2003

System image file is "flash:c1700-sy-mz.122-11.T.bin"

cisco 1760 (MPC860P) processor (revision 0x200) with 24576K/8192K bytes of memor


Processor board ID VMS06140063 (2684787217), with hardware revision BB67

MPC860P processor: part number 5, mask 2

Bridging software.

X.25 software, Version 3.0.0.

1 FastEthernet/IEEE 802.3 interface(s)

4 Serial(sync/async) network interface(s)

32K bytes of non-volatile configuration memory.

16384K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102


please help !!!


Re: rate-limit

Even though you have rate-limited on input, the actual interface will still see all of the packets (the controller still needs to deal with each packet before the forward / drop decision will be made).

Tye "sho int f0/0 rate-limit" to see if it is doing anything. Also, see how much traffic the router is actuially forwarding out of the other interfaces.

Good luck,


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