From: Ben (bmunyao@gmail.com)
Date: Sat Jul 21 2007 - 10:16:03 ART
Hi
Sometime back, I came across this interesting piece of information on the
use of OSPF on a multiaccess segment (Ethernet):
R2
|
| 10.1.1.0/24
---------------------------------------------
| |
| |
R1 R3
|
--------------
10.1.3.0/24
R1,R2 running OSPF, R1,R3 running RIP. if you use "net 10.1.1.1 0.0.0.0 area
0" to enable ospf on R1, then R2 will forward traffic for 10.1.3.0/24 to R1,
R1 will send an icmp redirect to R2, informing it that R3 is metrically
closer to the destination.
What I didn't know was that if instead you use "net 10.1.1.0 0.0.0.255 area
0" on R1, R2 will no longer send traffic to 10.1.3.0 via R1, and will
instead learn dynamically the metrically closer next-hop of 10.1.1.3 through
OSPF, thus saving one hop.
Does anyone have variations of this scenario I could try out, to test this
concept.
TIA
Ben
This archive was generated by hypermail 2.1.4 : Sat Aug 18 2007 - 08:17:41 ART