Static route issue

[gkurunthasalam]

Hi,

We have a setup of 2 WAN router from different ISP's connected to one switch.

In switch:

Routes are configured as

ip route 0.0.0.0 0.0.0.0 <Router-A gateway ip> track 20

ip route 0.0.0.0 0.0.0.0 <Router-B gateway ip> 200

track 20 ip route x.x.x.x x.x.x.x reachability

Router-A: ISP-1 - Primary

ip route 0.0.0.0 0.0.0.0 gateway ip

Router-B:ISP-2 - Backup

ip route 0.0.0.0 0.0.0.0 gateway ip

ISSUE:

1. We are facing slowness issues to all websites and high latency and some websites are not opening if we have Router-B is ON and connected.Traffic prefers Router-A primary

2.If we switch OFF RouterB WAN or shutdown RouterB wan interface, all services are working through primary-RouterA

3.Both ISP confirmed no issue sin their network.

Please what could be the issue for high latency and slowness in internet service if RouterB is ON and connect?

Regards

Gokul

[Cisco Freak]

Did you check if the switch is sending data through both the circuits and ends up in some sort of asymmetric packet routing situation?

CF

[gkurunthasalam]

i guess this is the issue. We have configured private segments in switch and Natted in routers. how to check asymmetric routing from public network?

[Georg Pauwen]

Hello,

I would create an EEM script on the switch that shuts down the interface of router B if router A is up. Can you post the configs of the switch ? And of course the output of 'show ip route' when both routers are up, just to be sure the tracking works.

[gkurunthasalam]

i will share the details with show ip route.

GK

[Georg Pauwen]

Hello Gokul,

I am not sure if your route tracking works. What is the output of 'show ip route' from the switch when both routers are up ?

[gkurunthasalam]

engineer left the site. he will back to site by tomorrow. i will connect routerB wan cable and will share the output.

[paul driver]

Hello

How are the wan rtrs connected to each other, are they running any routing protocol

What is you goal, would you like to LB between the two ISP circuits?

res
Paul

[gkurunthasalam]

Two routers are connected one siwtch.

my aim No LB, very simple, if ISP-1 goes down the traffic should shift to ISP-2.

Configured default routes to their respective gateways in the routers.

Switch route configuration i copied in above orignizal discussion.

- GK

[b0ying]

Is your Router-B ISP-2 a DSL connection?

If yes, kindly add this to your dialer

ip tcp adjust-mss 1452

Regards,

Erick