What's required to enable communication between two IP ranges located behind one switch?

Posted by Eric3 on Server Fault See other posts from Server Fault or by Eric3
Published on 2010-06-01T14:45:37Z Indexed on 2010/06/01 14:54 UTC
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Filed under:

networking

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ip

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routing

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switch

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subnet

Within our co-located networking closet, we have control over two ranges of 254 addresses, e.g. 64.123.45.0/24 and 65.234.56.0/24. The problem is, if a host has only one IP address, or a block of addresses in only one range, it can't contact any of the addresses in the other subnet.

All of our hosts use our hosting provider's respective gateway, e.g. 64.123.45.1 or 65.234.56.1
A host on the 64.123.45.0/24 range can contact the 65.234.56.1 gateway and vice-versa
Everything in our closet is connected to an HP ProCurve 2810 (a Layer 2-only switch), which connects through a Juniper NetScreen-25 firewall to the outside world

What can I do to enable communication between the two ranges? Is there some settings I can change, or do I need better networking equipment?

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