[c-nsp] Cisco 2811 performance issue - dual(new) isp

Daniel Hooper dhooper at gold.net.au
Tue Dec 20 03:03:50 EST 2011

I have no faith in sites like speedtest.net actually reporting the true speed of your link.

Use your ISP's local FTP site  & mirror sites or find one close to them upstream and perform testing.


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Jmail Clist
Sent: Tuesday, 20 December 2011 11:42 AM
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Cisco 2811 performance issue - dual(new) isp

I have attached another log called "latest_2811_logs". it contains the "sh ip traffic, sh int switching and a "show proc cpu sorted 1min" output immediately after doing a test on speedguide.net through the new isp2 connection. I see some throttle drops but not much more. I'm still puzzled at the poor performance. I put the interface back to auto as well and teh results are the same. Any ideas?

On Mon, Dec 19, 2011 at 9:03 PM, Christopher J. Wargaski
<wargo1 at gmail.com>wrote:

> According to
> http://www.cisco.com/web/partners/downloads/765/tools/quickreference/r
> outerperformance.pdf, the router can handle up to 16.44 Mbps of fast / 
> CEF switching. I was not able to see your attachments in the digest 
> nor in the archive. Do you have CEF enabled?
> cjw
> Date: Mon, 19 Dec 2011 10:57:11 -0600
>> From: Jmail Clist <jmlist80 at gmail.com>
>> To: cisco-nsp at puck.nether.net
>> Subject: [c-nsp] Cisco 2811 performance issue - dual(new) isp
>> Message-ID:
>>        <CAO8NJwLyKmQj8jUJTYg2_82fyxyyQLRuCOraaeH3BG9ONPr8=
>> Q at mail.gmail.com>
>> Content-Type: text/plain; charset="iso-8859-1"
>> Hello,
>> I have an issue that is really causing me grief. I recentely 
>> inherited a small network. There is an existing 1.5mbps Internet 
>> connection (fa0/0) (includes MPLS as well/same provider). We added a 
>> new ISP that allows for 50mb down/5mb up. I added the new ISP to 
>> fa0/1 and modified the NAT overload statements accordingly. I alo 
>> changed the default route to ONLY use the new, faster ISP connection. 
>> Using speedguide.net, I am only able to get 6 to 10mb down, most of 
>> the time. if I plug a laptop into the cable modem then I get 37 to 
>> 50mb down. Any idea why the 2811 is so slow? How much download speed 
>> can I expect to get? Any assisstance would be very much appreciated.
>> I have attached the config and various show outputs (nat, sh ver, 
>> memory, etc.).
>> Thank you,

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