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Throughput for Cisco 7140 with IOS 12.3(12)e

Cisco 7140 router running the latest 12.3(12e) code

with IPSec/IDS/FW feature set. Both F0/0 and F0/1

interfces on the 7140 is hard-code to 100-Full. These

interfaces are conected to a switchport F0/1 and

F0/1 of a Cisco 3750 Catalyst switch. These

switchports are also set to 100-Full as well

(speed 100/dup full).

cisco 7140 F0/0 ip address is and F0/1

ip address is

There are a couple of Gentoo Linux boxes, gen1 and

gen2. These boxes have dual quad-core processors

with 8GB RAM and 500GB of SATA HD. gen1 has ip address

of and gen2 has ip address of Default gw for gen1 and gen2 is and, repspectively. The

interface on gen1 and gen2 is hard code to 100-Full

as well. The same goes with the switchport on the

Catalyst 2960 switchport, F0/3 and F0/4, that gen1

and gen2 is connected to.

When I perform a 100GB file transfer via SecureCopy

(scp), aka ssh, between gen1 and gen2, the transfer

maxes out at 40mbps. The CPU on the Cisco 7140 reaches

99% utilization. I can not go past 40mbps throghput.

I verified this with "show interface F0/0" and "show

interface F0/1" command. I cleared the counter, came

back 30 minutes later and throughput never goes beyond


If I move gen1 and gen2 boxes into the same network,

for example,, I can get about 98mbps

throughput, so I know my gentoo linux boxes is not

the limiting factor.

The cisco 7140 has 384MB of RAM on there. When

I perform "show mem", I see that it has 80% free memory

but CPU is running at 99% with "IP Input" process is

running at 30%.

Is this normal that a Cisco 7140 can not provide

throughput higher than 40mbps?


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