Sla track config at dual isp at cisco router

[teymur azimov]

i want to configurate dual ISP at cisco router.

i want to know.

i must be write one sla track or two sla track?

[smitesh kharecha]

you want both ISP to be used simultaneously of 2nd one acting like a backup.

ip route 0.0.0.0 0.0.0.0 track 1

ip route 0.0.0.0 0.0.0.0 30

Will solve your problem, if you want to use one link at a time only.

HTH,

Smitesh

[teymur azimov]

i want one ISP primary and second ISP backup.

yes i want to used one link at a time when primary down then the backup isp is working

but i read that in this situation i must be write sla monitor like that config

interface FastEthernet0/0

description WAN1

ip address xxx.xxx.xxx.xxx 255.255.255.248

ip nat outside

ip virtual-reassembly

duplex auto

speed auto

!

interface FastEthernet0/1

description WAN2

ip address yyy.yyy.yyy.yyy 255.255.255.252

ip nat outside

ip virtual-reassembly

speed 100

full-duplex

ip sla monitor 1

type echo protocol ipIcmpEcho 4.2.2.2(or ISP ip) source-interface FastEthernet0/0

timeout 500

frequency 10

ip sla monitor schedule 1 life forever start-time now

my qeustion is?

can i write one sla monitor?? or i need two sla monitor??how many sla monitor i must be write?

[smitesh kharecha]

That because, when your ISP 1 goings down, your track is still able to sent and receive ICMP from ISP 2.

You need to make a access-list to deny icmp traffic to and from 4.2.2.2 on ISP 2 and apply that access-list on interfce connected to ISP 2.

It should then work as smooth as butter then...

Regards,

Smitesh