# RIP Reliable Default Route with IP SLA **URL:** \ **Category:** Lessons Discussion\ **Created:** [December 24, 2016, 6:53pm UTC](https://forum.networklessons.com/t/rip-reliable-default-route-with-ip-sla/968 "2016-12-24T18:53:15Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![shivamkhandelwal](https://cdn-forum.networklessons.com/letter_avatar_proxy/v4/letter/s/e19b73/32.png) [@shivamkhandelwal](https://forum.networklessons.com/u/shivamkhandelwal)\ **Post date:** [February 25, 2016, 12:06pm UTC](https://forum.networklessons.com/t/rip-reliable-default-route-with-ip-sla/968/4 "2016-02-25T12:06:51Z")
![Topology](http://i66.tinypic.com/33w3x29.jpg) Hello Rene, In this topology I, am tracking 8.8.8.8 which is hosted on R5 using a track 1 on R1 which is being called in Standby 1 to decrement priority by 90. when i am running a continous ping to 8.8.8.8 from PC1, Serial interfaces on all the routers in the path starts flapping. Even when i run a ping to Serial interface of R3 from PC1, Both R1 and R3 starts flapping. I tried to change the bandwidth of the serial interfaces but no it was of no help. I have attached router logs of R1 and R2 along with the config, Please have a look to findout what’s going wrong. Thanks --- _[View the full topic](https://forum.networklessons.com/t/rip-reliable-default-route-with-ip-sla/968)._