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WAN Fail-Over for DHCP WAN

stevenclark612
Level 1
Level 1

!
interface GigabitEthernet0/0/0
description ISP-001
ip address dhcp hostname ROUTER-001
ip flow ingress
ip flow egress
ip nat outside
ip virtual-reassembly in
zone-member security WAN
duplex full
speed 1000
!
interface GigabitEthernet0/1/0
description ISP-002
ip address dhcp hostname ROUTER-001
ip flow ingress
ip flow egress
ip nat outside
ip virtual-reassembly in
zone-member security WAN
duplex full
speed 1000
!
track 1 ip sla 1 reachability
!
!
ip nat inside source route-map RM-NAT-ISP01 interface GigabitEthernet0/0/0 overload
ip nat inside source route-map RM-NAT-ISP02 interface GigabitEthernet0/1/0 overload
!
ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/0/0 47.7.240.1 track 1
ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/1/0 192.168.1.1 2
ip route 8.8.8.8 255.255.255.255 GigabitEthernet0/0/0 47.7.240.1
!
ip sla 1
icmp-echo 8.8.8.8 source-interface GigabitEthernet0/0/0
threshold 300
timeout 6000
frequency 10
ip sla schedule 1 life forever start-time now
!
!
route-map RM-NAT-ISP02 permit 10
match ip address ACL-DNAT
match interface GigabitEthernet0/1/0
!
route-map RM-NAT-ISP01 permit 10
match ip address ACL-DNAT
match interface GigabitEthernet0/0/0

7 Replies 7

I tried this solution and did not have internet access

 

Can you share last config 

Current Config, also having issues with failover to ISP-002

Config Attached 

Thanks for sharing config 

But I dont see what I guide suggest for config track for dhcp gw?

Check guide I share above 

Also you use IP in default route' are you get these IP from ISP.

Check show arp see if this IP is appear.

Hello
Change your default static routes to negate unwarranted Arp from your rtr to the internet, At present the rtr is set to believe every ip address on the internet is directly connected to it, as such it will Arp for every destination it will try to reach.

Also as the  dhcp default routes are dynamic with an admin distance of 254 by default you may not be able to apply iplsa to a defined dhcp default static route directly.

Please review attached file.


Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul
Review Cisco Networking for a $25 gift card