800 Series Router WAN Throughput

Unanswered Question
Aug 7th, 2008

Can anyone tell me which 800 series routers allow 20 Mbps throughput across the WAN port?

I have a cable modem that outputs this speed but am having difficulty finding a router that will accept this throughput across the WAN port.

Thanks.

I have this problem too.
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Collin Clark Thu, 08/07/2008 - 13:13

The 871 and 881 have at least 32 Mbps firewall throughput. The WAN port is 10/100 so 20 Mbps throughput is no problem.

Hope that helps.

davidstrg99 Thu, 08/07/2008 - 13:16

That's exactly the information I'm looking for.

Other 800 series also have 10/100 WAN ports but reportedly do not transfer more than 10 Mbps.

Thank you.

davidstrg99 Thu, 08/07/2008 - 13:40

Now I'm confused again.

Customer support told me that the 871 supports 30 Mbps VPN so shouldn't it at least support 30 Mbps non-VPN across the WAN port?

rkhalil Thu, 08/07/2008 - 14:05

emm.. remember cisco say, the performance of laboratory tests..

The Perfomance of the Router

varies sharply according to different factors including the size of package and the kind of traffic..

From bottom of page http://www.cisco.com/en/US/partner/prod/collateral/routers/ps380/ps6200/prod_qas0900aecd8028a982.html

Performance

Q. What are the performance characteristics of the Cisco 870 Series and Cisco 850 Series Integrated Services Routers?

A. Aggregate performance with IPsec 3DES for the Cisco 870 Series is up to 8 Mbps with IMIX packets, and up to 30 Mbps with 1400-byte packets.

Aggregate performance with IPsec 3DES for the Cisco 850 Series is up to 4 Mbps with IMIX packets, and up to 8 Mbps with 1400-byte packets.

IMIX == Internet Mix Traffic.

--

Regards,

Raul

(please rate helpful posts)

Joseph W. Doherty Thu, 08/07/2008 - 15:26

As Raul notes, performance varies much, especially based on packet size. Large packets (best case) often quoted for impressive throughput. 64 byte packets usually the benchmark for (worst case). IMIX often the bencmark for (average case).

Joseph W. Doherty Thu, 08/07/2008 - 17:16

Often up to 1500 bytes, but the average size should be around 300 to 40 bytes, but with many packets both minimum and maximum sized.

Hi

I've found this area quite confusing and have seen conflicting information regarding router throughput.  From this document (http://www.cisco.com/web/partners/downloads/765/tools/quickreference/routerperformance.pdf), the throughput on the 870 router is 12.8 Mbps.  I'm currently using my own 871w router as the WAN side connection on an unmanaged fibre connection (no firewall - just routing) and I'm seeing 50Mbps through it.

Can anyone explain this?

Thanks

Cammy

Leo Laohoo Mon, 03/26/2012 - 15:06
the throughput on the 870 router is 12.8 Mbps.

The value stated on this PDF document is expressed in HALF duplex and without any encryption.  So if you want FULL duplex or with encryption then you halve the value.  If you want FULL duplex AND with FULL encryption then you take the full value and factor it by four.

Joseph W. Doherty Mon, 03/26/2012 - 18:02

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Posting

Depends on your packet sizes and features being used.  For instance, Cisco says the 860 (same nominal performance as an 870) can push 197 Mbps for 1500 byte packets doing nothing but packet forwarding yet they recommend the 860 for WAN circuits up to only 4 Mbps.

I've attached a later Cisco document that better explains performance.

Joseph W. Doherty Wed, 03/28/2012 - 02:32

Disclaimer

The  Author of this posting offers the information contained within this  posting without consideration and with the reader's understanding that  there's no implied or expressed suitability or fitness for any purpose.  Information provided is for informational purposes only and should not  be construed as rendering professional advice of any kind. Usage of this  posting's information is solely at reader's own risk.

Liability Disclaimer

In  no event shall Author be liable for any damages whatsoever (including,  without limitation, damages for loss of use, data or profit) arising out  of the use or inability to use the posting's information even if Author  has been advised of the possibility of such damage.

Posting

Or decryption or other services; otherwise correct.

Paolo Bevilacqua Wed, 03/28/2012 - 11:37

Cisco routers have hardware encryption. Consequently, there is not much performance difference.

John Peterson Sun, 09/16/2012 - 02:02

Hi,

I'm also having the same confusion. Our 881 shows on paper to push  roughly 12Mbps, but when using simple routing and acl we are obtaining speeds of 70Mpbs.

Therefore I don't see the pdf, is correct in any way, and if this is half duple then surely the speed is doubled on full not halfed. Unless I'm missing something.

I would appreciate if someone could please explain.

Paolo Bevilacqua Sun, 09/16/2012 - 02:10

You have an 881, not an old "800 series"..

Above has been linked the white paper to reference for ISR G2 routers, that is consistant with your performance observation.

Table 1. Cisco ISR G2 RFC 2544-Based Performance (kpps and Mbps)

kpps

(64-byte packets)

25 50 100 290 330 330 352 479 579 833 1845 982 2924

Mbps

(1500-byte packets)

197 198 1400 2770 2932 3114 3371 3502 5136 6903 6703 8025 8675

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John Peterson Sun, 09/16/2012 - 02:15

Hi Paolo,

Thank you,

Therefore a Cisco 881 should be able to router over 100Mbps of traffic?

I also have some old routers which I would like to use in our lab, how do I find out which routers these are? I know the model numbers but the 'G2' section?

Paolo Bevilacqua Sun, 09/16/2012 - 04:31

Yes, about that.

For lab purposes, performances are not important.

Thank you for the nice rating and good luck!

John Peterson Sun, 09/16/2012 - 05:04

I understand but these router in our labs we use on production environment post testing features.

How were you able to identify G2 routers?

Your welcome on the rating.

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