ospf load balance

From: Rajib Khan (rajib56666@yahoo.com)
Date: Tue Jul 05 2005 - 15:25:13 GMT-3


Hello group,

 

 

I am trying to understand ospf load balancing following is my diagram

 

     Area 0 --------- area 5

R1 -------- R2 area 6 R3 ------ R4

                        ---------

 

Please note there are 2 links between R2 and R3

 

 

 

What I have noticed in the routing table that traffic from R1 and R4 are not load balancing IA route between R2 and R3 even though I have configured ip ospf costs same.

 

Any idea what needs to be done? Following is my config

 

 

R2

 

router ospf 5

 router-id 1.1.2.2

  log-adjacency-changes

 area 6 virtual-link 1.1.3.3

 network 1.1.2.0 0.0.0.255 area 0

network 1.1.20.0 0.0.0.255 area 6

 network 1.1.6.0 0.0.0.255 area 6

 network 1.1.4.0 0.0.0.255 area 0

 maximum-paths 6

 

 

int e0

ip add 1.1.20.2 255.255.255.0

ip ospf network point-to-point

ip ospf cost 10

 

interface Serial1.5 oint-to-point

 ip address 1.1.6.2 255.255.255.0

 no ip route-cache

  ip ospf network point-to-point

 ip ospf cost 10

no ip mroute-cache

 frame-relay interface-dlci 302

 

 

R3

 

interface Ethernet4

 ip address 1.1.20.4 255.255.255.0

 no ip route-cache

  ip ospf cost 10

 no ip mroute-cache

 media-type 10BaseT

end

 

 

interface Serial1

 ip address 1.1.6.3 255.255.255.0

 encapsulation frame-relay

 no ip route-cache

ip ospf network point-to-point

 ip ospf cost 10

  no ip mroute-cache

 frame-relay map ip 1.1.6.2 202 broadcast

 frame-relay interface-dlci 202

!

 

router ospf 5

 router-id 1.1.3.3

 log-adjacency-changes

 area 6 virtual-link 1.1.2.2

  network 1.1.3.0 0.0.0.255 area 6

 network 1.1.20.0 0.0.0.255 area 6

 network 1.1.6.0 0.0.0.255 area 6

network 1.1.40.0 0.0.0.255 area 5

  maximum-paths 6

!

Thanks in advance

 

Raj



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