Is there a reason to use IOS 12.4 versus 15.x?

Is there a reason to use IOS 12.4 versus 15.x? Register Help Remember Me? What's New Today's Posts Forum Actions Mark Forums Read Advanced Search Forum Cisco CCNA / CCENT Is there a reason to use IOS 12.4 versus 15.x? + Reply to Thread Results 1 to 4 of 4 Thread: Is there a reason to use IOS 12.4 versus 15.x? Thread Tools Show Printable Version Subscribe to this Thread… weakness33 Junior Member Join Date Nov 2013 Location Chicagoland Posts 12
Certifications CNA/CNE/MCNE/A+/N+/S+ 12-03-2013 09:34 PM #1 Is there a reason to use IOS 12.4 versus 15.x?

I see a good amount of people posting about having to use v12.4 for lab configurations versus v15.x. Why is that? Is it because the actual exams are using and v15?

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Login/register to remove this advertisement. RouteMyPacket Senior Member Join Date Aug 2012 Location Dallas Posts 590
Certifications CCWNIA (Cisco Certified Wannabe Know It All) 12-03-2013 09:39 PM #2

Perhaps the HW they are using does not support v15 or they do not have the DRAM/Flash for it?

Last edited by networker050184; 12-03-2013 at 09:45 PM.Reason: Unnecessary Quote

Quote   TechGuru80 Senior Member Join Date May 2013 Posts 171
Certifications Network+, Security+, CCENT 12-03-2013 10:55 PM #3

Equipment with 12.4 will be less expensive than 15.x. Generally there will be less memory, possibly less ports, older equipment etc. At least for CCENT and CCNA, you don't miss many commands on 12.4 versus 15.x.

Quote   theodoxa Senior Member Join Date Jan 2013 Location Florida Posts 481
Certifications CCNA: RS; CIW: Web Foundations; MCTS: Active Directory; MCP: 2000 Professional; CNA: NetWare 5; CompTIA A+ 12-03-2013 11:11 PM #4

Back when I was buying my equipment a 1760 (IOS 12.4T) ran about $20 (Buy It Now) on eBay, while an ISR (IOS 15) ran $140 (Buy It Now). Prices were slightly lower if you bid or bought "As Is" (many were sold "As Is" because they had no IOS or the seller had no idea how to test it - at 1760 prices it was worth the risk to save $6). ISRs have come down some (I see the 1811 and 1841 for under $100 now), but that's still alot more than a 1760 costs, though not all that much more than the overpriced [for what it offers] 2600XM series.

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