I am looking at the potential of using a Cisco 2811 router for 10 Mbps to 10 Mbps (LAN to WAN) routing.
I have performed a number of baseline tests, and am concerned at the CPU loadings. The router seems to be capable of forwarding approx 60Mbps under test conditions with little data loss. However the CPU loading is at 99% over a 5 min period. With this CPU loading the cli access is unaffected and a show tech response is exceptionally good.
Does any one have any experience of the new 2811 platform under these conditions and what would be Cisco’s stand on running the CPU at this loading within an operational environment.
Many thanks in advance.
Please see the test results below and the tested routers config.
Tester MTU = 64 Bytes.
Tester Interface Interface Router
Loading bps Util CPU
10Mbps 9375000 23 / 255 48%
15Mbps 14083000 35 / 255 73%
20Mbps 18751000 47 / 255 83%
30Mbps 28170000 71 / 255 97%
60Mbps 56590000 144 / 255 99%
76Mbps 71397000 182 / 255 99%
2811#sh ver
Cisco IOS Software, 2800 Software (C2800NM-IPBASE-M), Version 12.3(8)T6, RELEAS)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2004 by Cisco Systems, Inc.
Compiled Wed 29-Dec-04 15:07 by hqluong
ROM: System Bootstrap, Version 12.3(8r)T7, RELEASE SOFTWARE (fc1)
2811 uptime is 3 hours, 24 minutes
System returned to ROM by reload at 12:31:09 UTC Tue Mar 22 2005
System image file is "flash:c2800nm-ipbase-mz.123-8.T6.bin"
Cisco 2811 (revision 53.51) with 251904K/10240K bytes of memory.
Processor board ID FHK0910F16W
2 FastEthernet interfaces
4 Channelized E1/PRI ports
DRAM configuration is 64 bits wide with parity enabled.
239K bytes of non-volatile configuration memory.
62592K bytes of ATA CompactFlash (Read/Write)
Configuration register is 0x2102
2811#sh run
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname 2811
!
boot-start-marker
boot-end-marker
!
no network-clock-participate wic 0
no network-clock-participate wic 1
no network-clock-participate aim 0
no network-clock-participate aim 1
no aaa new-model
ip subnet-zero
!
ip cef
!
no ftp-server write-enable
!
controller E1 0/0/0
!
controller E1 0/0/1
!
controller E1 0/1/0
!
controller E1 0/1/1
!
interface FastEthernet0/0
ip address 10.1.0.1 255.255.255.0
duplex full
speed 100
!
interface FastEthernet0/1
ip address 10.0.0.1 255.255.255.0
duplex full
speed 100
!
ip classless
ip http server
!
control-plane
!
line con 0
line aux 0
line vty 0 4
login
!
scheduler allocate 20000 1000
!
end
