This ones for all those routing experts out there. I am trying to alter the connection a route will take based on certain IP address.I have a few Cisco routers. I maybe able to post up the topology diagram. If anyone thinks they can help?

mediafire.com/?f34...

Just want to clarify that at moment everything is taking the shortest path via R2 although its not taking into account the Gig links.

Edited 27 June, 201313 yr by newskoda

And here was I thinking you needed help with one of THESE...................

mediafire.com/?f34...

Just want to clarify that at moment everything is taking the shortest path via R2 although its not taking into account the Gig links.

Hi Newskoda.

As soon as I get to PC to look at the image I will be able to assist.

Would a set static route on R3 and R1 not do it?

Something like that?

ip route 172.16.10.0 255.255.255.255 router inteface/IP address

Would a set static route on R3 and R1 not do it?

Something like that?

ip route 172.16.10.0 255.255.255.255 router inteface/IP address

Hi

A static route won't do it because R3 needs to be able to discern traffic from 172.16.30.0/29 and route accordingly.Similarly traffic destined for 172.16.30.0/29 from R2 must flow going from R2>R1>R3.

R2#SHOW IP ROUTE

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is 0.0.0.0 to network 0.0.0.0

192.168.12.0/30 is subnetted, 1 subnets

C 192.168.12.0 is directly connected, FastEthernet0/0

192.168.13.0/30 is subnetted, 1 subnets

O 192.168.13.0 [110/2] via 192.168.23.2, 00:17:02, FastEthernet1/0

[110/2] via 192.168.12.1, 00:17:02, FastEthernet0/0

172.16.0.0/16 is variably subnetted, 4 subnets, 2 masks

O IA 172.16.30.0/29 [110/2] via 192.168.23.2, 00:17:02, FastEthernet1/0

O IA 172.16.20.0/29 [110/2] via 192.168.23.2, 00:17:04, FastEthernet1/0

O IA 172.16.10.0/29 [110/2] via 192.168.23.2, 00:17:04, FastEthernet1/0

S 172.16.10.0/24 [1/0] via 192.168.12.1

24.0.0.0/24 is subnetted, 1 subnets

C 24.24.24.0 is directly connected, Serial2/0

192.168.23.0/30 is subnetted, 1 subnets

C 192.168.23.0 is directly connected, FastEthernet1/0

S* 0.0.0.0/0 is directly connected, Null0

As you can see I put a 172.16.30.0/29 static route in which points to 192.168.12.1. However this path is ignored due to the longest match rule.

I have since removed the 172.16.30.0/29 static route.

I need to somehow create a rule On R3 which examines traffic from 172.16.30.0/29 AND ROUTES it via R1 and then onto R2.As these are faster links and my 172.16.30.0/29 is a lot busier

similarly I need to ensure that traffic destined for 172.16.30.0/29 which passes through R2 uses the faster 1Gb links.

Sorry I ment to say my static route is

S 172.16.30.0 [1/0] via 192.168.12.1

O IA 172.16.20.0 [110/3] via 192.168.12.1, 00:01:50, FastEthernet0/0

O IA 172.16.10.0 [110/3] via 192.168.12.1, 00:01:50, FastEthernet0/0

*Mar 1 01:03:19.699: %SYS-5-CONFIG_I: Configured from console by console 24.0.0.0/24 is subnetted, 1 subnets

C 24.24.24.0 is directly connected, Serial2/0

192.168.23.0/30 is subnetted, 1 subnets

C 192.168.23.0 is directly connected, FastEthernet1/0

S* 0.0.0.0/0 is directly connected, Null0

R2#traceroute 172.16.30.1

Type escape sequence to abort.

Tracing the route to 172.16.30.1

1 192.168.12.1 180 msec 84 msec 72 msec

2 192.168.13.2 96 msec 156 msec *

I appreciate the idea about the static route but it doesn't solve the problem. Sorry. I don't want to use static routes as they take up resources. I also have to examine the source traffic when it comes from 172.16.30.0/29 when passing through R3. R3 will need to make the correct routing decision to send it to R1 instead of R2.

Here is R3's table

R3#show ip route ospf

192.168.12.0/30 is subnetted, 1 subnets

O 192.168.12.0 [110/2] via 192.168.23.1, 00:04:44, FastEthernet0/0

[110/2] via 192.168.13.1, 00:04:44, FastEthernet1/0

O*E2 0.0.0.0/0 [110/1] via 192.168.23.1, 00:04:44, FastEthernet0/0

I hope this makes sense. It is a bit confusing.

Edited 27 June, 201313 yr by newskoda

Would a set static route on R3 and R1 not do it?

Something like that?

ip route 172.16.10.0 255.255.255.255 router inteface/IP address

An IP route cannot be used if you are just wanting to add a route for one specific IP. Newskoda - Not able to look at the image so I am blind - Have you signed up to Ciscos Forum? I am on there if you post it I might be able to help

An IP route cannot be used if you are just wanting to add a route for one specific IP. Newskoda - Not able to look at the image so I am blind - Have you signed up to Ciscos Forum? I am on there if you post it I might be able to help

 

Hi,

 

Did you ever resolve this?

Set costs on OSPF Links should do it

 

https://supportforums.cisco.com/docs/DOC-5349