track 1 ip sla 1 reachability

track 2 ip sla 2 reachability

track 3 ip sla 3 reachability

track 101 list boolean or

object 1

object 2

object 3

!

ip nat inside source route-map NAT-to-ISP1 interface GigabitEthernet0/1 overload

ip nat inside source route-map NAT-to-ISP2 interface GigabitEthernet0/2 overload

ip route 0.0.0.0 0.0.0.0 11.11.11.1 track 101

ip route 0.0.0.0 0.0.0.0 22.22.22.2 2 name ISP2

ip route 8.8.4.4 255.255.255.255 11.11.11.1 name SLA1

ip route 87.250.250.3 255.255.255.255 11.11.11.1 name SLA2

ip route 2.22.239.193 255.255.255.255 11.11.11.1 name SLA3

!

ip sla 1

icmp-echo 8.8.4.4 source-interface GigabitEthernet0/1

tag ### ping Google DNS over ISP1 ###

timeout 5000

threshold 2

frequency 5

ip sla schedule 1 life forever start-time now

ip sla 2

icmp-echo 87.250.250.3 source-interface GigabitEthernet0/1

tag ### ping Yandex over ISP1###

timeout 5000

threshold 2

frequency 5

ip sla schedule 2 life forever start-time now

ip sla 3

icmp-echo 2.22.239.193 source-interface GigabitEthernet0/1

tag ### ping www.apple.com over ISP1###

timeout 5000

threshold 2

frequency 5

ip sla schedule 3 life forever start-time now

!

route-map NAT-to-ISP1 permit 10

match ip address NAT

match interface GigabitEthernet0/1

!

route-map NAT-to-ISP2 permit 10

match ip address NAT

match interface GigabitEthernet0/2

!

event manager applet ISP_1_UP

event track 101 state up

action 001 cli command «enable»

action 002 cli command «clear ip nat trans *»

action 003 syslog msg «ISP 1 is UP»

event manager applet ISP_1_DOWN

event track 101 state down

action 001 cli command «enable»

action 002 cli command «clear ip nat trans *»

action 003 syslog msg «ISP 1 is DOWN»

——————————————————————————————

Полезные команды:

sh track brief

Посмотреть статусы треков кратко

sh track

Посмотреть статусы треков полностью

sh ip sla summary

Проверка SLA

sh ip route track-table

Просмотр статуса маршрутов

sh ip nat statistics

Проверка работы NAT

Подробнее в статье: http://xgu.ru/ https://wiki.merionet.ru/seti/21/nastrojka-static-route-tracking-s-pomoshhyu-ip-sla/