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Cisco IOS Software Releases 12.0 Mainline

End-of-Sale Releases

Cisco IOS Software Release 12.0

Cisco IOS Software Release 12.0(26)

Cisco IOS Software Release 12.0(23)

Cisco IOS Software Release 12.0(22)

Cisco IOS Software Release 12.0(21)

Cisco IOS Software Release 12.0(21a)

Cisco IOS Software Release 12.0(20)

Cisco IOS Software Release 12.0(20a)

Cisco IOS Software Release 12.0(19)

Cisco IOS Software Release 12.0(19a)

Cisco IOS Software Release 12.0(18)

Cisco IOS Software Release 12.0(18a)

Cisco IOS Software Release 12.0(18b)

Cisco IOS Software Release 12.0(17)

Cisco IOS Software Release 12.0(17a)

Cisco IOS Software Release 12.0(16)

Cisco IOS Software Release 12.0(16a)

Cisco IOS Software Release 12.0(15)

Cisco IOS Software Release 12.0(15a)

Cisco IOS Software Release 12.0(14)

Cisco IOS Software Release 12.0(14a)

Cisco IOS Software Release 12.0(13)

Cisco IOS Software Release 12.0(13a)

Cisco IOS Software Release 12.0(12)

Cisco IOS Software Release 12.0(12a)

Cisco IOS Software Release 12.0(11)

Cisco IOS Software Release 12.0(11a)

Cisco IOS Software Release 12.0(10)

Cisco IOS Software Release 12.0(10a)

Cisco IOS Software Release 12.0(9)

Cisco IOS Software Release 12.0(9a)

Cisco IOS Software Release 12.0(8)

Cisco IOS Software Release 12.0(8a)

Cisco IOS Software Release 12.0(7)

Cisco IOS Software Release 12.0(7a)

Cisco IOS Software Release 12.0(6)

Cisco IOS Software Release 12.0(6a)

Cisco IOS Software Release 12.0(6b)

Cisco IOS Software Release 12.0(5)

Cisco IOS Software Release 12.0(5a)

Cisco IOS Software Release 12.0(4)

Cisco IOS Software Release 12.0(4a)

Cisco IOS Software Release 12.0(4b)

Cisco IOS Software Release 12.0(3)

Cisco IOS Software Release 12.0(3b)

Cisco IOS Software Release 12.0(3c)

Cisco IOS Software Release 12.0(3d)

Cisco IOS Software Release 12.0(2)

Cisco IOS Software Release 12.0(2a)

Cisco IOS Software Release 12.0(2b)

Cisco IOS Software Release 12.0(1)

Cisco IOS Software Release 12.0(1a)