[sdnog] Common problem in sudan | Duplex mismatch

[Tarig Yassin]

Hi Scott

>I have seen this on our network. 

So the problem is world wide not as I expected, I thought it only here in Sudan because we are using Huawei so much.

>I use a script to look through the nightly backups (I 
>get the output from various commands as well as the configs)
> to find them.

really this is a nice idea, I will try it.


> In cisco's routers:
> conf t
> int f1/0/1
> speed 100
> duplex full

Yeah this would solve most of them, but for links between Cisco & Huawei sometime it needs very weird settings, e.g. Cisco part sets to "duplex full" and huawei part sets to "auto"   :)

thanks



> Date: Tue, 27 Jan 2015 12:35:04 -0800
> From: surfer at mauigateway.com
> To: sdnog at sdnog.sd
> Subject: Re: [sdnog] Common problem in sudan | Duplex mismatch
> 
> --- tariq198487 at hotmail.com wrote:
> 
> The most common problem I face when I check the links 
> status in every network here in sudan that some links 
> are *half* duplex. 
> 
>    Why? May be there is compatablity issue between 
> Huawei and cisco. 
> 
>    What is the impact? Huge packet loss and very slow 
> browsing experience. 
> 
>    How to solve it? I do not know, I just try randomly 
> all posible settings in both routers cisco & Huawei 
> till it get resolved. 
> 
> For discussion:
>  Do you have this problem in your network? Or have you 
> faced it before.  Please help if you know the right 
> settings for both routers.
> 
> Note: I am serious every network I checked it has this problem. 
> --------------------------------------------------
> 
> 
> I have seen this on our network.  For example, I have seen 
> 100Mbps half-duplex be auto-negotiated between two devices
> from different manufacturers.  I go in and hard code them 
> when I find them.  I use a script to look through the nightly
> backups (I get the output from various commands as well as
> the configs) to find them.
> 
> In cisco's routers:
> 
> conf t
> 
> int f1/0/1
> speed 100
> duplex full
> 
> exit
> wr mem
> exit
> 
> 
> scott
> 
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