Throughput for Cisco 7140 with IOS 12.3(12)e

Unanswered Question
Feb 24th, 2008

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 192.168.0.1/24 and F0/1

ip address is 192.168.1.1/24.

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 192.168.0.10/24 and gen2 has ip address of

192.168.1.10/24. Default gw for gen1 and gen2 is

192.168.0.1 and 192.168.1.1, 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

40mbps.

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

for example, 192.168.0.0/24, 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?

Thanks.

I have this problem too.
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