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Maximum throughput on Cisco 2621 router

cisco24x7
Level 6
Level 6

I have two dell server 2950-III dual quad-core processors

3.0Ghz with 8GB RAM and 1TB SATA drive. Dell_1 has an

ip address of 192.168.1.10/24 Dell_2 has an ip address

of 192.168.1.20/24. Both of the dell is connected to

a Cisco 2960 Catalyst switch copper Gig. I am running

Redhat Linux ES 3 on these servers. I hard code the

interface to 1000/full

When I perform FTP between the servers, I can get about

800Mbps throughput. That's the good part.

Now, I have a Cisco 2621 (64RAM/16F) I connect both

F0/0 and F0/1 to the catalyst 2960. The router is

running IOS version 12.3(24). I set both the interface

of the router and the catalyst to 100 full-duplex.

I give F0/0 192.168.1.1/24, F0/1 192.168.2.1/24. I

give Dell_2 192.168.2.10/24 with the gateway to

be 192.168.2.1. Dell_1's default gateway is 192.168.1.1.

My FTP transfer is peaking out at 5Mbps between

Dell_1 and Dell_2 across the 2621. The CPU on the Cisco

2621 peaks at 99% cpu utilization. I see no

errors on both the catalyst switchports and on the router

interfaces. I thought I could get much better on the

Cisco 2621 than 5Mbps throughput. With

either SecureFTP (sFTP) or SecureCopy (scp), the through put drops to 2Mbps.

In other words, it gets worse.

Anyone know what the throughput for Cisco 2621 router?

IOS on the router is c2600-ik9o3s3-mz.123-24a.bin.

Thanks.

31 Replies 31

Okay then, how about behind the 7204VXR? (I recall you got 40 Mbps through it; still trying to see whether we can increase speed of 2621 if broadcasts not hitting its destination interface.)

Yes, it's normal. I was trying to have an exact match on packet size per the routeperformance document. The test was done on 64 Bytes and the 2621 spec was 12Mbps with CEF enabled - FastEthernet to FastEthernet.

While process-switching is only 1Mbps.

http://www.cisco.com/web/partners/downloads/765/tools/quickreference/routerperformance.pdf