From: Kash (kash2331@yahoo.com)
Date: Sat Apr 12 2003 - 10:02:41 GMT-3
Hi, Well as u might know that OSPF calculates the BW in a way that it is 100,000,000/(BW of interface). so for a Gig link it would be (100,000,000/(1000,000,000)) which comes out to be .1 and is taken as 1. This makes the Fast ethernet (100,000,000/(100,000,000))=1 also look the same to OSPF. Ethernet is 10. To change that u use the command auto-cost reference-bandwidth nnnnn (where nnnn value will be in Mbits) for eg to make Gigabit look better than Fast ethernet u would use the commandauto-cost reference-bandwidth 1000 This would make Gig -1 Fast Ether -10 and Ethernet -100 So based on this u would use the commandauto-cost reference-bandwidth 5000This would make Gig - 5 Fast Ether - 10 and Ethernet -500 Hope this helps u out. Kashif
pita40 <pita40@hotmail.com> wrote:I am confused with this command, according to cco
The following example changes the cost of the FDDI link to 10, while the
gigabit Ethernet link remains at a cost of 1. Thus, the link costs are
differentiated.
router ospf 1
auto-cost reference-bandwidth 1000
How does the router no only to reference the FDDI link?
Also, how do I make the gig link have a cost of 5 ?
Help.
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