From: Ravi (s_ravichandran@xxxxxxxxxxx)
Date: Sun Jul 01 2001 - 10:15:05 GMT-3
It depends on the total cost from host A to R4. OSPF will choose the route
with lowest cost. So in your case R4 has two route to host A. Now ospf will
check the cost and decide the best route. If it has equal cost then it will
do load balance. You can also manipulate the cost of a link and choose the
route that you would prefer.
Regards,
Ravi
----- Original Message -----
From: Wei Man <mandraw1@yahoo.com>
To: <ccielab@groupstudy.com>
Sent: Sunday, July 01, 2001 7:41 AM
Subject: OSPF Concept Question
> I have question regarding how OSPF behave
> in selecting route
>
>
> A--R0--R1----R2----R3---R4
> \ /
> ----------
> Where R1 is connected back to back with R2
> using Serial 0
> and R1 is connected back to back with R3 using
> Serial 1
>
> A is host connected to R0 and is in Area 0
> Link R0 to R1 , OSPF Area 0
> Link R1 to R2 , OSPF Area 1
> Link R2 to R3, OSPF Area 2
> Link R3 to R4, OSPF Area 2
> Link R1 to R3, OSPF Area 3
>
> There is virtual link to between R0-R1 to R2-R3
> using Area 1 as transit area
>
> When R4 try to reach A, which Route R4 will use
> Is R4-R3-R2(Virtual Link)-R1-R0-A or
> R4-R3-R1-A ?
> Can somebody explain to me how route selection
> in ospf works in this case ?
>
> Thanks in advance
>
>
>
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