[afnog] ZA <-> MZ Routing Problem

[Graham Beneke]

Hi,

On 10/10/2012 10:57, Antonio Godinho wrote:
> I am in Mozambique and can also relay your info to them. I have noticed this 
> as well for ISPs that use TDM services, the traffic does flow from here 
> directly to SA but is returned in many cases through London. I remember 
> vaguely doing some investigation before and it seems a lot of the networks 
> presenting the problem were under the MTN business network ASN. TDM is 
> connected to Telkom, it seems the advertisements are not going through to 
> TDM.

Thanks Antonio (and Wonder). I have not yet seen any noticeable changes.
Have you been able to raise anyone at TDM yet.

Graham

> 
> Cheers,
> 
> AG
> 
> On Mon, 08 Oct 2012 07:54:49 +0200, Graham Beneke wrote
>> Hi All
>>
>> Is anyone from Telecomunicações de Moçambique (TDM) on this list? 
>> I'd be happy for on-list or off-list responses.
>>
>> I have been tracking a routing problem between TDM and South Africa for
>> about the last 6 months and it seems that it has not been resolved.
>>
>> I am seeing high latency between TDM and South Africa and this is
>> negatively impacting Internet performance for a number of customers and
>> downstream ISPs in Mozambique, Malawi and potentially elsewhere too.
>>
>>  4  196.43.52.42 (196.43.52.42)  1.435 ms  1.698 ms  1.605 ms
>>  5  196.43.26.106 (196.43.26.106)  1.518 ms  1.414 ms  1.401 ms
>>  6  tdm-mozambique-gw2.telkom-ipnet.co.za (196.25.179.210)  175.688 
>> ms 176.444 ms  176.313 ms 7  gi-0-2.cta-isp-car-3.tdm.mz 
>> (41.220.160.202)  176.233 ms  176.154 ms 176.075 ms 8  
>> stats.zambeze.tdm.mz (196.28.224.21)  175.997 ms  176.333 ms 
>>  176.178 ms
>>
>> The round-trip latency between Johannesburg and Maputo should be 
>> under 30ms yet it is over 170ms. There does appear to be a direct 
>> cross border link so this should not be the case.
>>
>> What appears to be happening is that while routes from TDM are
>> propagating to peers in ZA, the 2000+ ZA route are not propagating into
>> MZ. Packets towards MZ are flowing directly cross border while the
>> return path is asynchronous via Europe.
>>
>> Can anyone assist with resolving this?
>>
>> -- 
>> Graham Beneke
>> Network Engineer      | Neology (PTY) Ltd.
>> graham at neology.co.za  | http://www.neology.co.za/
>> Dir: +27-10-500-5906  | Suite 301, Block C, Eva Park
>> Tel: +27-11-476-1933  | Cresta, Johannesburg
>> Skype: grbeneke       | MSN: graham at neology.co.za
>>
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> 
> 
> --
> Antonio Godinho
> B.Sc., MCP+I, MCSE, CCNA, CCNP
> CIUEM
> Maputo
> Mozambique
> 


-- 
Graham Beneke
Network Engineer      | Neology (PTY) Ltd.
graham at neology.co.za  | http://www.neology.co.za/
Dir: +27-10-500-5906  | Suite 301, Block C, Eva Park
Tel: +27-11-476-1933  | Cresta, Johannesburg
Skype: grbeneke       | Jabber: graham at neology.co.za