Cisco Tips & Tricks

October 5, 2009

Cisco Developers Superstitious? IOS 15.0 ??

Filed under: ccie, cisco — ciscotips @ 2:19 pm

Everybody is talking about it. Are cisco developers superstitious? Why did they skipped IOS 13.0 and 14.0? Well, I can’t say why but on the serious note, here is the overview

Cisco IOS Software Release 15.0 follows Release 12.4(24)T. Created for wide deployment in the world’s most demanding enterprise, access, and service provider networks, Cisco IOS Software Release 15.0 provides a comprehensive portfolio of Cisco technologies, functions, and hardware support from Releases 12.4 and 12.4T, anchored by an intensive stability and testing program. Important innovations span multiple technology areas, including security, voice, high availability, IP Routing and Multicast, quality of service (QoS), IP Mobility, Multiprotocol Label Switching (MPLS), VPNs, and Cisco IOS MPLS Embedded Management.
Cisco IOS Software Release 15.0 can help you by providing new feature and hardware support more quickly than in previous Mainline (M) and Technology (T) releases, broadened feature consistency with other major Cisco IOS Software Releases, more predictable new feature release and rebuild schedules, proactive individual release support policies, enhanced release numbering, and clearer software deployment and migration guidelines.
Here is the link to the new features


  1. May be 13 and 14 are reserved for future use 🙂

    shivlu jain

    Comment by shivlu jain — October 6, 2009 @ 6:13 am

    • Well, rumors say that Cisco avoided those version numbers because 13 is considered unlucky in the Western Culture and 14 is also considered unlucky in the Asian culture !!

      Comment by manoj — November 2, 2009 @ 5:45 pm

  2. The developers are probably not superstitious, but some customers might be. Unfortunately … but this is the world we have to live in.

    Comment by Ivan Pepelnjak — October 6, 2009 @ 6:43 pm

  3. Genuinely when someone doesn’t understand afterward its up to other visitors that they will
    help, so here it occurs.

    Comment by ios 8 apps — September 22, 2014 @ 11:03 pm

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