switch has two default ip route.what happens when one router down

[getaway51]

Hi,

I have switch with 2 ip routes. reason is because i have 2 router. 

ip route 0.0.0.0 0.0.0.0 10.1.1.1

ip route 0.0.0.0 0.0.0.0 10.1.1.2

If 10.1.1.2 is down, will switch still sending traffic to 10.1.1.2? 

[paul driver]

Hello

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@getaway51 wrote:

Hi,

I have switch with 2 ip routes. reason is because i have 2 router. 

ip route 0.0.0.0 0.0.0.0 10.1.1.1

ip route 0.0.0.0 0.0.0.0 10.1.1.2

If 10.1.1.2 is down, will switch still sending traffic to 10.1.1.2? 

---

 Yes /No depending if the physical interface actually registers its link down otherwise the traffic will blackholed

[getaway51]

any sample config? 

[paul driver]

Hello

sample config regards what?

[georgehewittuk1]

Utilising a dynamic routing protocol instead of using hard coded static/default routes will help you find a resolution. Dynamic routing protocols will converge when a link/router goes down to find an alternative path for traffic and to avoid any failures. You can also manipulate these protocols to weight/favour links. This all depends on your situation of course..

Many Thanks

George

[Alan Ng'ethe]

Or you can use ip sla, like this

That way, when 10.1.1.1 goes down, after a certain period traffic begins to be sent to 10.1.1.2.  

[getaway51]

What is the command to monitor the active interface and the sla timer? 

[paul driver]

Hello

If you wish to see sla details you can use:

sh ip sla statistics x  - sla number  optional