07-15-2010 11:12 PM - edited 03-06-2019 12:03 PM
Hi,
I have thesse 4 OSPF routers connected as below , with SVI interface forming the neighbors in BMA topology
R1____________100 Mbps____________R2
| |
| |
| 600 Mbps | 45 Mbps
| |
| |
R3_________________________________R4
45 Mbps
following is the config on each router
int vlan 653
ip address 192.168.1.x 255.255.255.0
router ospf 100
network 192.168.1.x 0.0.0.0 area 0
Now , i want Router R4 to choose the path R4-R2-R1 to reach R1, and backup path should be R4-R3-R1.
How can i tune the cost under vlan interface ( SVI ) ? Not sure whether route maps are gonna do the trick !!!
07-15-2010 11:19 PM
I guess handout diagram, does not reflect it properly there is direct link between R2 & R4.
07-17-2010 07:56 AM
Anyone any suggestions, tips.
07-18-2010 01:05 PM
Hello Satish,
if all devices are connected in a single broadcast domain / IP subnet as your drawing and your network configuration suggests each router would use the neighbor directly to reach IP subnets behind each router.
The only way to enforce a per neighbor cost that could be useful if two routers advertise the same subnet is to use
ip ospf network poin-to-multipoint non-broadcast
(note cisco proprietary) that would allow to specify per neighbor cost in the router ospf process
However, the best way would be to review design and to implement point-to-point links if possible.
Hope to help
Giuseppe
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