Reason for Limited number of Root DNS Servers

2011-11-10 Thread Gaurav Kansal
Dear All, Somewhere I read that number of ROOT DNS servers is limited to 13 because of protocol limitation of DNS and UDP. Exact writing was "A combination of limits in the DNS and certain protocols, namely the practical size of unfragmented User Datagram Protocol (UDP) packets, resulted in a

Re: Reason for Limited number of Root DNS Servers

2011-11-10 Thread Evan Hunt
On Fri, Nov 11, 2011 at 11:08:31AM +0530, Gaurav Kansal wrote: > As root DNS are running in anycast so number is not an issue at all. But I > don't understand where exactly is this limitation exists??? Prior to EDNS(0), DNS packets transmitted over UDP couldn't be more than 512 bytes in length. M

Re: Reason for Limited number of Root DNS Servers

2011-11-10 Thread Warren Kumari
On Nov 11, 2011, at 1:38 PM, Gaurav Kansal wrote: > Dear All, > > Somewhere I read that number of ROOT DNS servers is limited to 13 because of > protocol limitation of DNS and UDP. > Exact writing was “A combination of limits in the DNS and certain protocols, > namely the practical size of u

Re: Reason for Limited number of Root DNS Servers

2011-11-10 Thread Mark Andrews
In message <004c01cca034$259d4870$70d7d950$@nic.in>, Gaurav Kansal writes: > > Dear All, > > > > Somewhere I read that number of ROOT DNS servers is limited to 13 because of > protocol limitation of DNS and UDP. > > Exact writing was "A combination of limits in the DNS and certain > protoco

RE: Reason for Limited number of Root DNS Servers

2011-11-11 Thread Gaurav Kansal
y, 11 November, 2011 12:14 PM To: Gaurav Kansal Cc: bind-us...@isc.org Subject: Re: Reason for Limited number of Root DNS Servers In message <004c01cca034$259d4870$70d7d950$@nic.in>, Gaurav Kansal writes: > > Dear All, > > > > Somewhere I read that number of ROOT

Re: Reason for Limited number of Root DNS Servers

2011-11-11 Thread Aleksander Kurczyk
There is more than 13 physical root servers but these servers have only 13 domain names (a-m.root-servers.net) and ip addresses. Only 13 because of limitation of single DNS message to 512 bits (RFC 1035). http://root-servers.org -- List and map of the root servers Dnia 11 listopada 2011 6:38 Gaur

Re: Reason for Limited number of Root DNS Servers

2011-11-11 Thread Kevin Darcy
Mark Andrews [mailto:ma...@isc.org] Sent: Friday, 11 November, 2011 12:14 PM To: Gaurav Kansal Cc: bind-us...@isc.org Subject: Re: Reason for Limited number of Root DNS Servers In message<004c01cca034$259d4870$70d7d950$@nic.in>, Gaurav Kansal writes: Dear All, Somewhere I read that number

Re: Reason for Limited number of Root DNS Servers

2011-11-11 Thread Mark Andrews
r, 2011 12:14 PM > To: Gaurav Kansal > Cc: bind-us...@isc.org > Subject: Re: Reason for Limited number of Root DNS Servers > > > In message <004c01cca034$259d4870$70d7d950$@nic.in>, Gaurav Kansal writes: > > > > Dear All, > > > > > > > >

Re: Reason for Limited number of Root DNS Servers

2011-11-14 Thread Florian Weimer
* Gaurav Kansal: > As root DNS are running in anycast so number is not an issue at all. But I > don't understand where exactly is this limitation exists??? The limitation does not exist, otherwise it would not have been possible to add IPv6 addresses to the priming response. -- Florian Weimer