One of our customer has 3 ISP Line, out of which Two are Broadband and One is Leased Line. All 3 ISP interfaces are Etherent.
Now, they want Auto Failover with Load balancing among these 3 ISP lines.
Can we do same implementation in Cisco 1941 Router?? What licenses required in router for same?
Is there any other option?
1. You need to create ACL that will match internal LAN subnet.
2. Configure 3 default static route pointing ISPs IP address.
3. Create route-maps that will match ACL above.
And Cisco CEF will take care of load-balancinf between these links.
Description Primary link ISP1
ip address 12.x.x.x 255.255.255.240
ip nat outside
Description Secondary link ISP2
ip address 76.x.x.x. 255.255.255.252
Description link ISP3
ip address 96.x.x.x. 255.255.255.252
Description Inside LAN segment
ip address 172.16.20.1 255.255.255.0
ip nat inside
access-list 100 permit ip 172.16.20.0 0.0.0.255 any
route-map isp1 permit 10
match ip address 100
match interface FastEthernet0/0
route-map isp2 permit 10
match interface FastEthernet1/0
route-map isp3 permit 10
match interface FastEthernet0/1
ip nat inside source route-map isp1 interface FastEthernet0/0 overload
ip nat inside source route-map isp2 interface FastEthernet1/0 overload
ip nat inside source route-map isp3 interface FastEthernet0/1 overload
ip route 0.0.0.0 0.0.0.0 12.y.y.y track 1
ip route 0.0.0.0 0.0.0.0 76.y.y.y track 2
ip route 0.0.0.0 0.0.0.0 96.y.y.y track 3
Also you could add IP SLA to monitor those links. In case of failure one of the links it will be removed from routing table.
ip sla 1
icmp-echo 126.96.36.199 source-interface FastEthernet0/0
ip sla schedule 1 life forever start-time now
ip sla 2
icmp-echo 188.8.131.52 source-interface FastEthernet1/0
ip sla schedule 2 life forever start-time now
ip sla 3
icmp-echo 184.108.40.206 source-interface FastEthernet0/1
ip sla schedule 3 life forever start-time now
track 1 ip sla 1 reachability
track 2 ip sla 2 reachability
track 3 ip sla 3 reachability
Hope it will help. Best regards, Abzal
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: