AS5350XM vs 3845 raw performance?

[p0lar]

I and a friend were speculating today at the office about which of these could handle a higher volume of calls (via ipipgw image as a SBC while proxying media), being that Cisco states the AS5350XM can theoretically handle 1000 sessions (2000 legs) and he's seen the 3845 reach somewhere in the neighbourhood of 700 with ACLs.

I didn't see a CPU speed on the 3845 in its sh ver though I suspect it's an R7K @ some.high.mhz. The AS5350XM has a 750MHz CPU.

Might anyone know what CPU is in the 3845 router? It doesn't really matter since I purchased the 5350XM anyway (co-lo, pay by the U+bandwidth, so the size😛erformance ratio of the 3845 precludes it regardless), but my late-night curiosity is getting the best of me. If I can find some hardware to put on each end of these that can test the limits of these in simple routing performance, I'm going to give them a go head-to-head for kicks.

 

[cmetz]

p0lar, I believe that the 3845 is an okay but not particularly interesting MIPS CPU, but has a reasonably beefy FPGA that accelerates the data plane. Cisco claims the 3845 is good for IP data up to 2xT3. I always divide Cisco's numbers by 1/2 to 1/4 depending on how many features I plan on turning on.

I am not happy with the ISR series' quality and stability. The AS is probably a much better choice for those criteria.

 

[p0lar]

Originally posted by: cmetz
p0lar, I believe that the 3845 is an okay but not particularly interesting MIPS CPU, but has a reasonably beefy FPGA that accelerates the data plane. Cisco claims the 3845 is good for IP data up to 2xT3. I always divide Cisco's numbers by 1/2 to 1/4 depending on how many features I plan on turning on.

I am not happy with the ISR series' quality and stability. The AS is probably a much better choice for those criteria.

Yeah, they say the 5350xm can switch TDM at 2xDS3 capacity as well. I'm actually going to put my ACLs upstream on another router, so we'll see what this thing can handle real soon. I agree with your assessment of the 3800 ISR series. They're way overpriced at the moment, despite additional functionality that doesn't always work as advertised.

 

[azev]

Originally posted by: cmetz
p0lar, I believe that the 3845 is an okay but not particularly interesting MIPS CPU, but has a reasonably beefy FPGA that accelerates the data plane. Cisco claims the 3845 is good for IP data up to 2xT3. I always divide Cisco's numbers by 1/2 to 1/4 depending on how many features I plan on turning on.

I am not happy with the ISR series' quality and stability. The AS is probably a much better choice for those criteria.

According to a friend of mine, whatever performance cisco listed on their hardware data-sheet, substract that number by 6 and you get the real world performance.