Thursday, May 9, 2019

Procurve 3400CL L3 Switch routing with Public IP's

Currently I have space in a datacenter (DC) where the DC supplies a copper cross-connect. The cross-connect is attached to a Procurve 3400CL Layer 3 switch. The switch is feeding 5 firewalls. I manage the switch via a private management vlan, the cross connect is on a separate vlan with the firewalls. There is no IP address assigned to the public vlan. Simple.

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We are moving locations in the DC, and our network configuration in changing. In the new config the DC will allocate us a /30 network, via a fiber cross-connect. Our existing IP range will sit behind the /30. So we will need some very simple routing to make this work.

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Is it safe to harden the config on the switch and use its layer 3 capabilities to handle this setup. My main concern is assigning a public IP address to the switch. Putting a public ip on a switch feels wrong, but maybe it is okay? Using this equipment would be preferable to adding a new router or firewall to handle this traffic.

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Any thoughts or experience with this?

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Any better hardware suggestions?

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We are not a huge organization, budget is a factor.



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