If you could give a little more details on your topology perhaps we could give better answer.
"Currently I have a static route: "
ip route 0.0.0.0 0.0.0.0 172.20.xx.xx
this is not ordinary static route, this is a default route on your 4500 pointing to your firewall as a gateway of last resort for all your internal subnets within 4500 to be able to get outbound internet via firewall.
If you have several vlans in your 4500 including subnets from 172.20.0.0 net all internal traffic is contained within the 4500 through inter-vlan routing and does not hit the firewall unless traffic needs to go outbound internet.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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