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IP SLA or some other configuration

TRACY HARTMANN
Beginner
Beginner

I have a layer 3 switch that has two circuits 1 Gig and 1 10 Gig to the same location.  I want to use them as Primary and backup.  We have tried to do this with just a EIGRP routing option but doesn't seem to be taking over correctly.   Could I possible do something with ip SLA which says

 

Interface G01

ip address 10.20.0.1

 

interface Tg01

ip address 10.20.0.5

 

then do a track of 10.20.0.6 the other side of the Ten gig, if it goes away it woud route to the 10.20.0.1

 

I could do a route-map with a next-hop but what would be the best solution?

 

 

4 Replies 4

Georg Pauwen
VIP Master VIP Master
VIP Master

Hello,

 

an IP SLA is definitely an option.

 

track 1 ip sla 1 reachability

!

ip sla 1

icmp-echo 10.0.0.6 source-ip 10.0.0.5

frequency 5

!

ip sla schedule 1 start-time now life forever

!

ip route 0.0.0.0 0.0.0.0 10.0.0.6 track 1

ip route 0.0.0.0 0.0.0.0 10.0.0.2 200

I am assuming I need to put this on both routers on either side...

 

Hello,

 

does the other side consist of one or two routers ? If it is one router, you can indeed mirror the suggested config.

Giuseppe Larosa
Hall of Fame Master Hall of Fame Master
Hall of Fame Master

Hello TRACY,

to make it work with EIGRP it is just enough to increase delay on the giga interface. Because EIGRP metric is cumulative on delay.

 

interface giga01

delay 10000

 

doing it on both sides should make the tengiga link preferred.

 

Hope to help

Giuseppe

 

 

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