Hi Stephane thanks, your scheme is very expressive.And sorry for forgetting to send this message to my own list (afnog). regarding the subject the next hop of default route of our customers are ISP routers then SUIN routers. Is this a normal situation??? Normal0falsefalsefalseEN-USX-NONEAR-SAMicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} --------------------------------- Eng. Tarig Yassin Adam Sudanese Universities' Information Network (SUIN) T: +249925659149 ----- Original Message ----- From: Stephane Bortzmeyer <bortzmeyer@nic.fr> To: Tarig Yassin Adam <tarig@suin.edu.sd> Cc: Phil Regnauld <regnauld@nsrc.org> , <afnog@afnog.org> Date: Tuesday, February 2 2010 11:40 AM Subject: Re: NREN Network Design On Mon, Feb 01, 2010 at 10:04:07PM -0500, Tarig Yassin Adam <tarig@suin.edu.sd> wrote a message of 597 lines which said:
hi phil
[And thanks for forwarding this discussion where it belongs. It is sad that a discussion on an african NREN was first carried to a North America list.]
We already applied to AfriNIC, they allocated to us /18 ipv4 we're using two ISPs to connect to our customers and the same time we're using these ISPs for the Internet.
And you use BGP? You have your own AS?
The ISP using tunnel layer 3.
I am sorry, I cannot parse this sentence.
For customer sites to reach our NOC they need next hop to the ISP routers which we do not have a control.
The way I understand it (you are really short on details), the universities are your customers and there is always an ISP between NREN and UNI: +---------+ | | +---------+ | NREN |---------| ISP 1 |------- UNI 1 +---------+ +---------+ | | \ +--------+ | \ | ISP 2 | +-----------+ \ +--------+-------| Internet | +--------+ | | +-----------+ | UNI 2 | | | | | +------+ +-------+ +--------+ |UNI 3 | | UNI 4 | +------+ +-------+ Is my schema OK? If no, please provide yours. If yes, I wonder, what service provides the NREN if no connectivity? If you just provide Internet servers (HTTP, XMPP, etc), there is no need to "tunnel" anything over the ISP.