Dynamic Multipoint VPN

My company is using frame relay to connect remote offices.  I am planing to replace existing frame relay with  Dynamic multipoint vpn in hub sopke configuration by using cisco 1841 and 800 series routers in order to reduce cost. I wanted check is there any security issues are related with this setup since it uses Dynamic IPs from ISP in all spoke locations.  Thanks in advance.
manuitproAsked:
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lrmooreCommented:
Of course using public Internet is less secure than using a private frame-relay network. One facet of security is availability and you just can't rely on low-cost Internet for business critical applications. Another issue is QoS. No guarantee delivery over public internet. If you ever want to run business critical voice, better think twice.
And because they use dynamic IP's, it is difficult to manage/monitor your infrastructure. DMVPN really wants the tunnel endpoints to be static to work best.
You might want to talk to your provider about MPLS circuits instead. Costs more, but you get what you pay for.

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