RE: Cisco G2 ISR WAN performance of 1Gbps?

Where do you see 100% CPU utilization mentioned?

tv

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Andy
Reid
Sent: Friday, November 20, 2009 9:17 AM
To: ron.wilkerson_at_gmail.com
Cc: Azhar Mirza; Cisco certification
Subject: Re: Cisco G2 ISR WAN performance of 1Gbps?

Hi Ron,

Of course. Several studies have shown that the 1002 can get near 1Gbps
throughput, but with no services running and 100% CPU utilization. In
the real world you would not want to be stressing out the hardware to
that extent. Example study:
http://networking.ventrefamily.com/asr-ethernet-overhead

In comparison, the 1006 can achieve 10Gbps throughput.
http://www.cisco.com/en/US/prod/collateral/routers/ps9343/ASR_1006_Summary_R
eport__as_of_1100_02Jun08.pdf

If there is a real requirement for 1-10Gbps throughput then I recommend
the 1004 or 1006 to my clients. This is typically a requirement at a
medium to large DC, whereas the remote sites are usually connected by a
WAN link anywhere between an 256Kbps ADSL to a 100Mbps Ethernet circuit.
For these sites, WAN throughput is easily managed by a 800 series or ISR
router depending upon size of link, number of users, applications, etc.

The only times I need to set expectations is when the client has a fiber
connection, that terminates at 1Gbps on the ISR, as the router is never
going to reach anywhere near that level of throughput.

regards Andy

ron.wilkerson_at_gmail.com wrote:
> Can you provide thoughts on the 1002 and why you advise against it?
>
> Thanks.
>
> -----Original Message-----
> From: Andy Reid <ccie_at_reid.it>
> Date: Fri, 20 Nov 2009 17:51:31
> To: Azhar Mirza<azhar.mirza_at_netservicesplc.com>
> Cc: Cisco certification<ccielab_at_groupstudy.com>
> Subject: Re: Cisco G2 ISR WAN performance of 1Gbps?
>
> Hi Azhar,
>
> The highest spec ISR G2 - 3945 - can handle 150Mbps of real throughput
> with all services turned on. If you require true Gigabit throughput then
> I suggest you look at the Cisco ASR 1000's, and not the small one,
> equipped with an appropriate SIP/SPA module.
> Remember that the ISR's are software routers.
>
> regards Andy
>
> Azhar Mirza wrote:
>
>> Experts,
>>
>> I have got one question if anyone could clarify please.
>>
>> Are the new G2 ISRs 29xx & 39xx capable of handling 1Gbps WAN throughput
using HWIC-1GE-SFP, as 28xx/38xx had limitation *** (see below) of max
500Mbps due to HWIC interface bus speed limitation ?
>>
>> G2 supports EHWICs; What are the new EHWICs available? Is there any
EHWICs for 1Gbps?
>>
>>
>> What is the best (lowest cost) Cisco router that can support 1Gbps
Ethernet WAN? Do I need ASR for this? I need three 1Gbps interfaces.
>>
>>
>> ----------------------------------
>> *** HWIC-1GE-SFP FAQ says:
>>
http://www.cisco.com/en/US/prod/collateral/routers/ps5854/prod_qas0900aecd80
169bf0_ps5949_Products_Q_and_A_Item.html
>>
>> Q. Q: What is the maximum throughput on the Gigabit Ethernet HWIC?
>> A: A: The HWIC bus interface is limited to 400 Mbps of full duplex. The
actual throughput of the Gigabit Ethernet HWIC is limited by the throughput
of individual platforms. Under bidirectional traffic of 1518 bytes or
larger, the Gigabit Ethernet HWIC can support up to an aggregate of 350 Mbps
on Cisco 2811 and 2821 routers, 400 Mbps on Cisco 2851 routers, and 500 Mbps
on Cisco 3800 Series platforms.
>> ----------------------------------
>>
>> Thanks and Kind Regards,
>>
>>
>> Azhar Mirza
>> Head of Pre Sales
>>
>> netSERVICES
>> Waters Edge Business Park
>> Modwen Road
>> Manchester, M5 3EZ
>>
>> e: azhar.mirza_at_netservicesplc.com
>> w: www.netservicesplc.com
>>
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Received on Fri Nov 20 2009 - 10:33:14 ART