[bdNOG] How does Google select their Cache Engine IP nearest to the request sender?

Wed Feb 5 16:24:27 BDT 2014

Hi Aniruddha Da,

Yeap that's a problem. At first I planned to do it using NO_EXPORT. But the
problem is we have to peer with the node using a different ASN rather than
our own. So it doesn't work. However for your case with us ping me outside
the list. I will send you my BGP communities. Which will help you a bit.

BR,
Moin

On Tue, Feb 4, 2014 at 10:00 PM, Aniruddha Barua
<aniruddha.barua at colbd.com>wrote:

>  Dear Moin bhai,
>
> Thanks for your reply. I understand the NDA part. I don't want anyone to
> disclose anything.
>
> But many things have become clearer to me now. From an end ISP's point of
> view, to better utilize BGP partial or full routes or even to advertise
> larger prefixes for fail-over function, all our upstream IIGs should have
> Cache nodes directly connected to their ASes. Otherwise traffic becomes
> unbalanced for us, as far as Google/YouTube and other cache based services
> are concerned. Google cache nodes should look at BGP attributes too, at
> least AS_PATH lengths. Is there anyone from Google in this list? ;-)
>
> Best regards to all,
>
> ANIRUDDHA BARUA
> Email: aniruddha.barua at colbd.com, cto at colbd.com
>
>
> *---------- Original Message -----------*
> From: Muhammad Moinur Rahman <5u623l20 at gmail.com>
> To: Aniruddha Barua <aniruddha.barua at colbd.com>
> Cc: "nog at bdnog.org" <nog at bdnog.org>
> Sent: Tue, 4 Feb 2014 18:32:03 +0600
> Subject: Re: [bdNOG] How does Google select their Cache Engine IP nearest
> to the request sender?
>
> > Hi Aniruddha Da,
> >
> > Due to NDA I cannot disclose much. But so far my work they emphasize on
> advertising the prefix of your resolver.
> >
> > Let's say you are using a resolver A.B.C.D. This prefix or a longer
> version is advertised to Cache Node. When you are querying for one of their
> records they somehow check if your resolver is advertised towards any of
> the Cache node's BGP feed. If it finds it in any of their Nodes they reply
> with an IP address from that block otherwise they reply from their block.
> They do not check any other BGP attributes just the availability of the
> prefix.
> >
> > Hope this meets your thirst. If not let me know. Maybe next week we can
> meet somewhere. I will be in CTG to deploy the same for you. 3:)
> >
> > BR,
> > Moin
> >
> > On Tue, Feb 4, 2014 at 5:17 PM, Aniruddha Barua <
> aniruddha.barua at colbd.com> wrote:
> >
>>
>> Hello Everyone,
>> >
>> > I have a question to the bdNOG community. I believe someone knows the
>> answer.
>> >
>> > Question is "How does Google select their Cache Engine IP nearest to
>> the request sender?"
>> >
>> > No doubt, they look at BGP tables for ASN of request sender but I want
>> to know more specifics like,
>> > do they look at BGP attributes, if yes then what BGP attributes, any
>> algorithm other than BGP etc.
>> > Thanks in advance.
>> >
>> > Regards,
>> >
>> > ANIRUDDHA BARUA
>> > Email: aniruddha.barua at colbd.com, cto at colbd.com
>> >
>> > _______________________________________________
>> > nog mailing list
>> > nog at bdnog.org
>> > http://mailman.bdnog.org/mailman/listinfo/nog
>> >
>
>
> *------- End of Original Message -------*
>
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