OSPF cost is based on the bandwidth setting on Cisco routers. The cost of an interface defaults to 100,000,000 divided by the bandwidth for the interface. For example, a 100-Mbps Ethernet interface has a cost of 1.
Priscilla At 03:06 PM 5/13/02, W. Alan Robertson wrote: >Rajesh, > >Correct... The bandwidth statement has no impact on other routing >protocols, like OSPF. OSPF looks at the "cost" of a link in >determining best path. There's no direct correllation between >"bandwidth" and "cost." > >As for what to set "bandwidth" to, you set it on both ends of a >connection based on the lower speed. > >As an example, if you had two routers connected via frame-relay, one >of which utilized a T-1, and the other utilizing a 256k Fractional >T-1, you should set the bandwidth to 256kbps. Most likely, you'd be >terminating each PVC to it's own Serial sub-interface, so on the >sub-interface, you'd set the bandwidth value to 256kbps (You may also >consider basing the bandwidth assignment on CIR (Committed Information >Rate), rather than the actual port speed). > >If, on the other hand, you were running OSPF, you'd simply adjust the >ospf cost on each sub-interface. > >Alan > > > >----- Original Message ----- >From: "Rajesh Kumar" >To: >Sent: Monday, May 13, 2002 12:54 PM >Subject: Bandwidth command!! [7:44055] > > > > Hi all, > > > > CCIE Practical studies - Vol I book - EIGRP chapter says that the > > bandwidth command used in serial interfaces should be set to a value > > equal to the remote port speed to which the serial interface is > > connected to. > > > > [snip] > > > > My question is - Is it not going to affect the other routing >protocols > > like OSPF where we set the bandwidth decides the cost of the >outgoing > > interfaces. > > > > Can somebody shed some light on this please? ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=44087&t=44055 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
