Hi Srikanth,
As above said, NAT will not support on 3750, it only support on 6500 series.
See the below table for the same.
This table provides information about NAT feature support in Catalyst switches:
| Catalyst Platform | Minimum Software Release |
|---|
| Catalyst 6500/6000—CatOS1 with Cisco IOS® Software on MSFC2/MSFC2/MSFC3 | All versions |
| Catalyst 6000—CatOS (MSM3) | No support |
| Catalyst 6500/6000—Cisco IOS system software | All versions |
| Catalyst 5500/5000 (RSM) 4 | Cisco IOS Software Releases 11.2(P),11.3(T), 12.0, 12.0T, 12.1, 12.1T |
| Catalyst 5500/5000 (RSFC5) | Cisco IOS Software Release 12.1 |
| Catalyst 4500/4000—CatOS (WS-X4232-L3) | No support/no plans |
| Catalyst 4500/4000—Cisco IOS Software (Supervisor Engine II+/III/IV/V) | No support currently6 |
| Catalyst 3750 | No support |
| Catalyst 3560 | No support |
| Catalyst 3550 | No support |
| Catalyst 2970 | Not applicable (no support for IP routing7) |
| Catalyst 2950/2955 | Not applicable (no support for IP routing7) |
| Catalyst 2940 | Not applicable (no support for IP routing7) |
| Catalyst 2900XL/3500XL | Not applicable (no support for IP routing) |
| Catalyst 2948G-L3/4908G-L3 | No support/no plans |
| Catalyst 1900 | Not applicable (no support for IP routing) |
| Catalyst 8500 | No support/no plans |
Please rate the helpfull posts.
Regards,
Naidu.
