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Dual ISP - Redundancy and Load Balancing

dbergstrom1
Level 1
Level 1

First off not Cisco certified just self taught in order to keep things running and clean out some garbage from the previous guy.

 

We are adding a 2nd ISP connection this summer and I am looking how to setup our Router to Load Balance while both lines are up or fail over to a single connection if one fails.

 

We have a Cisco 2921 Router and Cisco 5510 Firewall.

Router

Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.2(4)M5, RELEASE SOFTWARE (fc2)

 

Firewall

Cisco Adaptive Security Appliance Software Version 9.1(5) 
Device Manager Version 7.3(3)

 

Our firewall currently handles the NAT will I need to move that to the Router?

Also will I need IP SLA on the router?  If so I know I need to buy the Data license.

Current Connection is 100Mb/100Mb Down/Up guaranteed.

New connection is 150Mb/20Mb Down/Up but not guaranteed.  Will connect to interface GigabitEthernet0/2

 

Current Router Setup

ip cef

!

policy-map Shape-100MB
 class class-default
  shape average 100000000
!
interface Embedded-Service-Engine0/0
 no ip address
 shutdown
!
interface GigabitEthernet0/0
 description Router to Firewall
 ip address 100.100.100.65 255.255.255.224
 no ip redirects
 duplex auto
 speed auto
 no mop enabled
!
interface GigabitEthernet0/1
 description Router to ISP A 100MB
 ip address 100.100.100.50 255.255.255.252
 ip verify unicast reverse-path allow-self-ping
 duplex full
 speed 100
 service-policy output Shape-100MB
!
interface GigabitEthernet0/2
 shutdown
 no ip address


ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/1 100.100.100.49

1 Reply 1

Lost & Found
Level 2
Level 2

Hi,

I would like to ask if you are done with your configuration? Is it working?

next month we will add an addition ISP and I will try to configure it?

Hope you'll give me some ideas.

thank you

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