For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

Terry_Rodecker_'s avatar
Terry_Rodecker_
Icon for Nimbostratus rankNimbostratus
Nov 30, 2010

Cable Modem connection on F5 Link Controllers

We recently installed 2 F5 Link Controllers to allow for load balancing our ISPs. They are currently in the data flow and are handling our traffic but we are not load balancing between the 2 existing...
config
design
Terry_Rodecker_'s avatar
Terry_Rodecker_
Icon for Nimbostratus rankNimbostratus
Nov 30, 2010
Thanks. We got it fixed though I don't truly understand why it didn't want to work before.

 

 

The F5s and the ISP were on the same subnet so no route was necessary. As it turns out, the ISP's cable modems don't like to be connected to Cisco equipment. It was directly connected to a Cisco 2960, which kept the F5s from working. I then placed a Cisco ASA (aka Pix Firewall) between the 2960 and the cable modem and the same thing, the ASA could access the Internet but nothing behind it could. I replaced the ASA with a $19 Linksys router and everything is working fine now.