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Are your firewalls/routers configured with &quot;ip classless&quot; and &quot;no auto-summarization?
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Are your firewalls/routers configured with "ip classless" and "no auto-summarization?

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This is a pointer to another question...please see..<br />
<a href="https://www.experts-exchange.com/questions/23110014/VPN-to-multiple-offices-with-similar-network-schemes-is-not-working.html?cid=239&anchorAnswerId=20749572#a20749572" rel="ugc">https://www.experts-exchange.com/questions/23110014/VPN-to-multiple-offices-with-similar-network-schemes-is-not-working.html?cid=239&anchorAnswerId=20749572#a20749572</a><br />

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This is a pointer to another question...please see..
http://www.experts-exchange.com/Hardware/Networking_Hardware/Firewalls/Q_23110014.html?cid=239#a20749572


Pix to Pix overlapping network issue

Software firewalls, also known as host-based firewalls, provide a layer of software on one host that controls network traffic in and out of that single machine. Most operating systems now include firewall software, but many available software firewalls include central distribution, antivirus systems and disaster recovery.