throughput query on cisco 3845

January 7, 2009 @ 5:09 pm · Filed under CCIE Study

Thanks one and all for reply…

I have a point to point link with 1Gbps (DWDM) from service provider terminating on Fiber (multimode). Now I am using Cisco 3845 router at both the ends for this connection. This router has two Gigabit Ethernet onboard with external as SFP and internal as RJ45.

I am not using any QoS or Encryption or any filtering. I will be sending Storage replication and Citrix traffic over this link most of the time. Considering all these facts and running default MTU size of 1500 bytes, what could be the maximum throughput I can achieve? I am planning to do some testing in coming days by testing with traffic generator.

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From: 4g1vn [mailto:shaun.gomez@gmail.com] Sent: Wednesday, January 07, 2009 9:13 PM To: Subodh Singh Rawat (WT01 - ENERGY & UTILITIES) Subject: Re: throughput query on cisco 3845

I have to agree with Pavel on this one. It’s a very subjective matter. There are so many factors to consider. Packet size, services, interface type (Ethernet or serial), etc…
I would venture to say that straight routing through the Ethernet interfaces and no additional services you can achieve 500Mbps-800Mbps (don’t crucify me as I have not tested with a 3845). This would be with larger packets. If your using serial interfaces stick to the 45Mbps range (wire rate).
I personally know that nested QoS polices tend to chew up the CPU.
If possible, configure a mock production environment and put it through it’s paces.
-shaun
On Wed, Jan 7, 2009 at 2:00 PM, wrote:
Hi Guys,

Can any one please confirm that cisco 3845-MB router with onboard Gigabit interface (RJ45 or SFP) supports how much of maximum throughput?

Does it has maximum throughput of 256Mbps only?

Thanks
Subodh

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