OSPF challenge

I have an scenario where i would like to send traffic from one vlan to one "normal" route and the other vlan to the longer route using OSPF. if the longer route fails i'd like to send the traffic to the normal route i dont know if any one seen something like this. there are a few routers involve this is a cisco 3570 and the reson this needs to be don is to save bandwidth any advice will be apreciated

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mikej412

Understanding Policy Routing - Cisco Systems

Policy-Based Routing [IP Routing] - Cisco Systems

Policy-Based Routing Using the set ip default next-hop and set ip next-hop Commands Configuration Example [IP Routed Protocols] - Cisco Systems

matt79

ilcram19-2 wrote: »

I have an scenario where i would like to send traffic from one vlan to one "normal" route and the other vlan to the longer route using OSPF. if the longer route fails i'd like to send the traffic to the normal route i dont know if any one seen something like this. there are a few routers involve this is a cisco 3570 and the reson this needs to be don is to save bandwidth any advice will be apreciated

I am not sure the exact question, but it seems like you could use HSRP to do what you are talking about, if I understand it correctly.

ilcram19-2

mikej412 wrote: »

Understanding Policy Routing - Cisco Systems

Policy-Based Routing [IP Routing] - Cisco Systems

Policy-Based Routing Using the set ip default next-hop and set ip next-hop Commands Configuration Example [IP Routed Protocols] - Cisco Systems

thanks alot man!! i was afraid i was gonna have to use PBR i was trying to use something less cpu intensive but also used EEM take a look

interface FastEthernet1/0
ip address 192.168.4.1 255.255.255.0
ip policy route-map DR <--- Route policy applied to interface to forward traffic to private link router

ip access-list extended DR-site
permit ip 192.168.4.0 0.0.0.255 172.29.100.0 0.0.0.255 log

route-map DR permit 10 match ip address DR-navisite
set ip next-hop 192.168.2.13

i had to create the below config if the interface reamind up after the failure since is plug in to a switch
event manager applet USLINK_DOWN
event syslog pattern " %OSPF-5-ADJCHG: Process 1, Nbr 10.1.2.1 on FastEthernet0/0 from FULL to DOWN, Neighbor Down: Dead timer expired"
action 1.0 cli command "enable"
action 1.1 cli command "configure terminal"
action 1.2 cli command "interface fastethernet0/1"
action 1.3 cli command "no ip policy route-map DR"

This will add the route map back up to the interface
event manager applet USLINK_UP
event syslog pattern "%OSPF-5-ADJCHG: Process 1, Nbr 10.1.2.1 on FastEthernet0/0 from LOADING to FULL, Loading Done"
action 1.0 cli command "enable"
action 1.1 cli command "configure terminal"
action 1.2 cli command "interface fastethernet0/1"
action 1.3 cli command "ip policy route-map DR"

jason_lunde

That is a creative routing solution man.

APA

I agree with Jason.... thinking outside the box with eem

ilcram19-2

APA wrote: »

I agree with Jason.... thinking outside the box with eem

i first i didnt get the idea but is pretty cool defently something that can be use in alot of situations

EEM Configuration for Cisco Integrated Services Router Platforms [Cisco IOS Embedded Event Manager (EEM)] - Cisco Systems

cdad2000

Use the cost command.

ilcram19-2

cdad2000 wrote: »

Use the cost command.

That wasnt going to work on this topology i wanted only traffic from that subnet to the remote subnet to take the longer path without affecting the OSPF failover or any other subnet.