[sdnog] Weekly Routing Table Report

[Yousra Abdalla]

Hi Patrick ,


On Wed, Nov 13, 2019, 13:58 Patrick Okui <pokui at psg.com> wrote:

> Hi Yousra, all,
>
> On 13 Nov 2019, at 13:40 EAT, Yousra Abdalla wrote:
>
> - The reminder or the update of the weekly routing report is
> very important for me J
>
> Ok good,,,can you please tell me WHY ? Maybe by simple example ? This what
> I wanted to understand
>
> Thanks in advance ..
> *******************************
>
> It’s easier to give examples if we know what kind of network you operate.
>
Is that matters? But ok ..I'm fresh graduate working for a small University
network ( where I don't work with BGP and just know it theoretically )

And ...

Your elow points is fair enough ! ( Thanks) I wanted to know is it help on
daily Operation ? Is it for research purposes ?

I wanted a common/simple case where routing report can be used as a start
of debugging

Maybe I asked in wrong way!  ... Anyway that helps .... Thank you !

> I’ll try and give two general ones. For more specific ones, we’d have to
> know what your environment looks like.
>
> Samir earlier explained that networks advertise prefixes to the Internet.
> This is done today using BGP.
>
>    1.
>
>    If you are an ISP in Sudan, you will buy transit from different
>    providers and provide that Internet to your customers. An important
>    decision you’ll have to make is if any of your routers needs to carry the
>    full internet routing table (to decide which transit provider to use or
>    because one of your customers is the kind that wants to make their routing
>    policy based on the full routing table). In this scenario just knowing the
>    size of the table will tell you the minimum RAM and other specs you must
>    purchase for the routers going to hold this table.
>    2.
>
>    Some providers worldwide filter/block BGP announcements longer than a
>    certain length. Others block networks that suddenly announce large numbers
>    of prefixes. If you operate a corporate network and suddenly lose
>    connectivity to some parts of the Internet *and* you find your
>    upstream ISP is listed under either of these two categories, you could have
>    found the reason why your connectivity to those networks is affected. You
>    can then start debugging to figure out if that’s the case.
>
> --
> patrick
>
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