From: Nitro Drops (nitrodrops@hotmail.com)
Date: Tue Dec 30 2008 - 09:43:11 ARST
Setup :
R3 E0/1 (173.1.23.3/24) > F0/3 SW2 (vlan23)
R4 F0/1 (173.1.23.4/24) > F0/4 SW2 (vlan23)
SW2 vlan 23 173.1.23.8/24
OSPF Adjacency between SW2, R3 & R4.
Task - SW2 takes into consideration of R3 E0/1 (Ethernet) and R4 F0/1
(FastEthernet) interfaces when computing OSPF.
Solution
- change ospf type to P2MP NB on all 3 devices
- Under SW2 OSPF process
neighbor 173.1.23.3 cost 10 < Ethernet
neighbor 173.1.23.4 cost 1 < FastEthernet
Qns1.) To derive the cost value. Normally i configured the b/w under the
interface, followed by 'sh ip ospf int brief' to capture the cost value for
the configured b/w. Is there any other way to derive the cost value? And can i
leave the b/w statement on R3 E0/1 and R4 F0/1 interfaces?
Qns2.) Is there a possibility to use "auto-cost reference-bandwidth " for this
task?
Qns3.) Last but not leave, what are the differences between (i) 'neighbor
cost' in P2MP NB mode and (ii) auto-cost reference-bandwidth under OSPF
process?
Cheers
Nit
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