Best IOS version for WS-C3548-XL? int ra would be nice...

How do i find out what the best IOS version this switch supports is?

I looked at but it doesn't seem to have this product listed.

I did search for the command int ra, but & it seems that it is supported in v12.0, but I have no idea what version i need.
#sh ver
Cisco Internetwork Operating System Software                                                                            
IOS (tm) C3500XL Software (C3500XL-C3H2S-M), Version 12.0(5)WC15, RELEASE SOFTWARE (fc1)                                
Copyright (c) 1986-2006 by cisco Systems, Inc.                                                                          
Compiled Fri 12-May-06 16:01 by antonino                                                                                
Image text-base: 0x00003000, data-base: 0x00352494                                                                      
ROM: Bootstrap program is C3500XL boot loader                                                                           
helL0_48 uptime is 1 hour, 56 minutes                                                                                   
System returned to ROM by reload                                                                                        
System restarted at 11:00:51 UTC Thu Jan 31 2008                                                                        
System image file is "flash:c3500xl-c3h2s-mz.120-5.WC15.bin"                                                            
cisco WS-C3548-XL (PowerPC403) processor (revision 0x01) with 16384K/1024K bytes of memory.                             
Processor board ID FOC0612W184, with hardware revision 0x00                                                             
Last reset from warm-reset                                                                                              
Processor is running Enterprise Edition Software                                                                        
Cluster command switch capable                                                                                          
Cluster member switch capable                                                                                           
48 FastEthernet/IEEE 802.3 interface(s)                                                                                 
2 Gigabit Ethernet/IEEE 802.3 interface(s)                                                                              
32K bytes of flash-simulated non-volatile configuration memory.                                                         
Base ethernet MAC Address: 00:09:43:B2:DD:40                                                                            
Motherboard assembly number: 73-3903-09                                                                                 
Power supply part number: 34-0971-02                                                                                    
Motherboard serial number: FOC061204JN                                                                                  
Power supply serial number: PAC06080072                                                                                 
Model revision number: M0                                                                                               
Motherboard revision number: A0                                                                                         
Model number: WS-C3548-XL-EN                                                                                            
System serial number: FOC0612W184                                                                                       
Configuration register is 0xF

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Cisco has defined the 3548 as EoL (end of life) and no longer supports it so, in turn they dont list the 3548 in their IOS download's page.
Wibble_Author Commented:
Great, does that mean that there are no (legal) ways to get firmware updates?
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Yes. I went onto Cisco's IOS download page and the 35xx series isn't even listed anymore.
Wibble_Author Commented:
thankyou thankyou thankyou thankyou thankyou :)
Wibble_Author Commented:

how on earth did you find that?
Searching on cisco's site is as much an art as a science :)
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