IP SLA Problem ( Reliable Static route with tracking ) ?

[m.rummaneh]

Dear Cisco Prof 

My Scenario :

I have 3 Cisco Routers as following :
G.SHDSL Router : Cisco 3845 with
ISDN and Branch Router : Cisco 2811

How My Network works :
Branch Router has two type of connection ( First one : G.SHDSL link work as Main link and the other one ISDN Link work as Backup link )
when main link goes down the ISDN link goes up ...
( Note : i applied IP SLA with tracking ) ...\

My Problem :
i want to delete default route from ( G.SHDSL Router )
0.0.0.0 0.0.0.0 dialer 3

- Note : My network works properly with these configuration but when i delete the default route 0.0.0.0 0.0.0.0 dailer3 , my network goes down ( Failover technique not works )

in general :

My network should works with two these router :

ip route 192.168.6.0 255.255.255.0 172.113.2.1 10
ip route 192.168.6.0 255.255.255.0 Dialer3 track 1

I noticed that ( ip route 192.168.6.0 255.255.255.0 Dialer3 track 1 doesnot work )

Please advice me what should i Do.

Thanks

[saurabh_knl]

Hi,

When you do sla icmp-echo, you are providing the source-interface as dialer.,  Could you also try providing the source IP address (as your LAN interface) of that icmp-echo.

HTH

[Latchum Naidu]

Hi,

What I understand is that the GSHDSL is the primary link and the ISDN is the backup link.
You want automatic failover to ISDN when GSHDSL link is down. Is this is what you want?

This can be achive by configuring IP SLA with tracking the primary interface.
Please refer the below config which suits you...

ip route 192.168.6.0 255.255.255.0 172.113.2.1 10 track 1
ip route 192.168.6.0 255.255.255.0 Dialer3

ip sla 1
icmp-echo 172.113.0.253 source-interface GigabitEthernet0/1
timeout 1000
threshold 2
frequency 3
ip sla schedule 1 life forever start-time now

Hope the above will help you...

Please rate the helpfull posts.
Regards,
Naidu.

[m.rummaneh]

thanks for quick response

you are right , i need g.shdsl as primary link and isdn as backup link

note : the configuration should apply on g.shdsl router not branch router koz g.shdsl router is main router .

i need to correct somthing

-- ip sla 1
icmp-echo 172.113.0.253 source-interface GigabitEthernet0/1
timeout 1000
threshold 2
frequency 3
ip sla schedule 1 life forever start-time now

i think you should you do that :

ip sla 1
icmp-echo 10.10.10.2 source-interface 10.10.10.1  ( i need to check if this gshdsl link between main router and branch router down , the main router

delete the route ( IP route 192.168.6.0 255.255.255.0 dialer 3 track 1 ) and add another route ( IP route 192.168.6.0 255.255.255.0 172.113.2.1 10 )

timeout 1000
threshold 2
frequency 3
ip sla schedule 1 life forever start-time now

Please advice me ASAP

[m.rummaneh]

Thanks for your response

you can check the file ( G.shdsl Router .txt and daiagram ) as attahced file you will see the good draw about my network

anyway :

i applied the

icmp-echo 10.10.10.2 source interface dailer 3

--- IP 10.10.10.2 ( this ip i got it from Provider - negotiated ) = destination IP address

--- source interface dialer 3 ( its IP address ( from provider too ) 10.10.10.1

Thanks in advance