バージョンを確認します

Router(config)# show version
NEC Portable Internetwork Core Operating System Software
IX Series IX2010 (magellan-sec) Software, Version 6.3.23, RELEASE SOFTWARE
Compiled Nov 17-Thu-2005 11:45:52 JST #2 by takai, coregen-7.3(21)

ROM: System Bootstrap, Version 16.6
System Diagnostic, Version 14.4

System uptime is 1 minute
System woke up by reload, caused by power-on
System started at Feb 14-Sun-2055 06:16:48 JST
System image file is "ix2010-ms-6.3.23.ldc"
Processor board ID <2>
IX2015 (MPC8270A) processor with 65536K bytes of memory.
3 FastEthernet/IEEE 802.3 interfaces
1 ISDN Basic Rate interface
512K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read/Write)

バージョンは6.3.23です。