The MPLS-OPS Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] Re: nat at the PE
Alfred: Why would you want to do NAT on a PE? From a customer's operational standpoint the CE is where customer's physical network ends -- and most customers like to have control of their IP space. From a service provider's operational standpoint, would they really want NAT sucking down the CPU cycles on their PE routers? -- which in turn would up their costs for providing MPLS VPN services their customers. Maybe I'm missing something here, but I don't see any reason in your CUG example that you'd need to have NAT on the PE routers. Please note: although I work for Cisco, I'm not advocating any Cisco position on this. I'm just trying to understand the technical and/or operational reason why you'd ever want NAT on the PE routers. --Wulf At 04:24 PM 9/19/2001 +0800, alfred zhang wrote: >Hi guys, > > I'm doing some testing about nat in the mpls vpn .I assumed the ISP > want to provide internet access to their VPN customers only, with Closed > User Group, there can be a public ip address segment that every VPN can > access it. Due to IP address issue, NAT is needed somewhere in this > public segment for each VPN. Can PE do this nat function?Or I have to use > CE or one external NAT box. > > >Best regards, >alfred zhang >------- >The MPLS-OPS Mailing List >Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml >Archive: http://www.mplsrc.com/mpls-ops_archive.shtml ******************************************************** "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." - Benjamin Franklin, ~1784 ******************************************************** Wulf Losee Product Manager Cisco Systems, INSMBU email: wulf@cisco.com vox: 408.525.1493 cell: 408.406.4914 fax: 408.525.4251 page: 800.365.4578 ******************************************************** ------- The MPLS-OPS Mailing List Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml Archive: http://www.mplsrc.com/mpls-ops_archive.shtml
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