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I would suggest that you configure NAT on the 6509.<br />
<br />
<a href="http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_example09186a0080881718.shtml" rel="ugc">http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_example09186a0080881718.shtml</a>
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I would suggest that you configure NAT on the 6509.

http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_example09186a0080881718.shtml [http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_example09186a0080881718.shtml]

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Hi Tee , Don <br />
<br />
If based on your recommendation to do NAT at the distribution switch ( Cat6509 ). &nbsp;<br />
Meaning to say I do not req the Layer 3 switch ( 3750X ) ? <br />
<br />
And also allow the Access switches, &nbsp;behind &nbsp;Layer 3 switch ( 3750X) to connect directly to distribution swtich (cat6509) ? &nbsp;Probably to have individual uplink from each access to distribution. <br />
<br />
Because I might have total 5x access switches (3560X) to support all the severs . &nbsp;Not shown in the diagram , &nbsp;for VLAN 10 to VLAN 70.
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Hi Tee , Don

If based on your recommendation to do NAT at the distribution switch ( Cat6509 ).  
Meaning to say I do not req the Layer 3 switch ( 3750X ) ?

And also allow the Access switches,  behind  Layer 3 switch ( 3750X) to connect directly to distribution swtich (cat6509) ?  Probably to have individual uplink from each access to distribution.

Because I might have total 5x access switches (3560X) to support all the severs .  Not shown in the diagram ,  for VLAN 10 to VLAN 70.

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<div class="content wysiwyg-content">
Hi expert,<br />
<br />
I need to do a small lab setup within my company. &nbsp;My small department will have about 20 staff . &nbsp;Then i will also have a small Data centre which host around 20x servers. &nbsp;I will like to have my own assign private IP addresses for my servers. &nbsp;Therefore , &nbsp;I believe i might need NAT internally. <br />
<br />
I have attached a network diagram , which shown the Layer 3 ( 3750x) to do NAT . &nbsp;<br />
Appreciate if any expert can advise , is this correct way to do NAT ???<br />
<a href="https://filedb.experts-exchange.com/incoming/2013/06_w25/660693/Picture1.jpg" target="_blank" class="file-inline" title="Can do NAT with Layer 3 switches  (106 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>Picture1.jpg</a>
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Picture1.jpg

Hi expert,

I need to do a small lab setup within my company.  My small department will have about 20 staff .  Then i will also have a small Data centre which host around 20x servers.  I will like to have my own assign private IP addresses for my servers.  Therefore ,  I believe i might need NAT internally. 

I have attached a network diagram , which shown the Layer 3 ( 3750x) to do NAT .  
Appreciate if any expert can advise , is this correct way to do NAT ???

Can do NAT with cisco 3750X ?

Networking hardware includes the physical devices facilitating the use of a computer network. Typically, networking hardware includes gateways, routers, network bridges, modems, wireless access points, networking cables, line drivers, switches, hubs, and repeaters. But it also includes hybrid network devices such as multilayer switches, protocol converters, bridge routers, proxy servers, firewalls, network address translators, multiplexers, network interface controllers, wireless network interface controllers, ISDN terminal adapters and other related hardware.

Networking Hardware-Other

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.