NREN Network Design

Tarig Y. Adam tarig at suin.edu.sd
Tue Feb 2 15:18:52 CST 2010


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???


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Eng. Tarig Yassin Adam
Sudanese Universities' Information Network (SUIN)
T:
+249925659149
----- Original Message -----
From: Stephane Bortzmeyer <bortzmeyer at nic.fr>
To: Tarig Yassin Adam <tarig at suin.edu.sd>
Cc: Phil Regnauld <regnauld at nsrc.org> ,   <afnog at 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 at 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.


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