[c-nsp] Cisco 7301 limitation ?

[Bill Blackford]

It is a software router. I've had these fall over from too many small packets. 

Sent from my iPhone

> On Apr 20, 2017, at 13:07, Arie Vayner <ariev at vayner.net> wrote:
> 
> I would check for MTU and fragmentation issues... If the router is
> fragmenting, it would bring the CPU up...
> 
> On Thu, Apr 20, 2017 at 10:41 AM Olivier CALVANO <o.calvano at gmail.com>
> wrote:
> 
>> Hi
>> 
>> i have a problems with a cisco 7301 IOS:
>> 
>> Cisco IOS Software, 7301 Software (C7301-ADVENTERPRISEK9-M), Version
>> 12.2(33)SRD5, RELEASE SOFTWARE (fc2)
>> 
>> No special config on C7301, no qos, no access list, no filter ... only IP
>> Route
>> 
>> 
>> 
>> On this router, i have two ports used:
>>    GigabitEthernet0/0
>>    GigabitEthernet0/1
>> 
>> Port 0/0 it's a 1 Gbits link
>> Port 0/1 it's a 1 Gbits link but i two vlan each vlan is a fiber remote
>> link, one of 20Mbits and the second 500 Mbits
>> 
>> 
>> When i start a upload from a pc behind the 500 Mbits vlan link, no
>> problems, i have 500 Mbits and cpu is good:
>> CPU utilization for five seconds: 33%/22%
>> 
>> 
>> 
>> but when i download, i am limited to 266 Mbits and the CPU of the C7301 are
>> high:
>> 
>> CPU utilization for five seconds: 98%/43%
>> 
>> 
>> anyone know this problems ?
>> 
>> It's possible because the cisco don't know that the vlan is limited at 500
>> mbits and he want sent at 1 gbits ?
>> 
>> regards
>> Olivier
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