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Load Balance Traffic Going to internet

HNETENG
Level 1
Level 1

Dear Sir,

        If I have the below scenario:

1- Two routers facing the internet each of them is connected to different ISP. 

2- both routers should provide HA in configuration. 

3- Internet Firewalls will be configured in (Active/Standby). 

4- having four client subnets /24 each. each subnet is on different VLAN connect to internal network. 

if I want to load balance the traffic of the clients from the 4 VLANs towards ISP1 and ISP2. and if I configured GLBP and NAT on the two routers, will this do the job. considering that traffic when it come our of the Active Firewall interface toward the two routers it will come from a single MAC address of the Active Firewall port facing the two routers. So, if GLBP use the source MAC address to load balance the traffic. will I have an internet load balancing scenario. and if not what do you suggest as a configure on the two routers to have client load balanced when going to the internet. 

Below diagram explain the topology. 

 

2 Replies 2

balaji.bandi
Hall of Fame
Hall of Fame

If the Firewall is Active Standby , so One firewall will be passing all traffic, so you can split the load based on VLAN

example VLAN 1 and 2 go via ISP1, VLAN 2 and 3 go via ISP2 - if any of the ISP fails, all the VLAN1-4 use active ISP and failover back when other link come back- that is high level.

Look at the below thread :

https://community.cisco.com/t5/routing/cisco-asa-5508-dual-isp-setup-with-pbr-or-vlan-tagging/td-p/4261684

BB

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I think this can be done via multi context check link

MHM

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