سلام من یه روتر 2600 دارم با مشخصات زیر که می خوام IOS اون رو ارتقا بدم. اما نمیدونمبه چه نسخه ایی ارتقا بدم .روتر Gateway هست . Nat رو انجام میده و یه ماژول NM32 رو هم رویه خودش داره. ممنون میشم که اساتید راهنمایی کنند. Cisco Internetwork Operating System SoftwareIOS (tm) C2600 Software (C2600-C-M), Version 12.2(3), RELEASE SOFTWARE (fc1)Copyright (c) 1986-2001 by cisco Systems, Inc.Compiled Wed 18-Jul-01 17:47 by pwadeImage text-base: 0x80008088, data-base: 0x80900F28ROM: System Bootstrap, Version 12.1(3r)T2, RELEASE SOFTWARE (fc1)C-2621 uptime is 16 hours, 3 minutesSystem returned to ROM by reloadSystem image file is "flash:c2600-c-mz.122-3.bin"cisco 2620 (MPC860) processor (revision 0x600) with 28672K/4096K bytes of memory.Processor board ID JAD05220HT0 (1099981703)M860 processor: part number 0, mask 49Bridging software.SuperLAT software (copyright 1990 by Meridian Technology Corp).X.25 software, Version 3.0.0.TN3270 Emulation software.1 FastEthernet/IEEE 802.3 interface(s)1 Serial network interface(s)32 terminal line(s)32K bytes of non-volatile configuration memory.8192K bytes of processor board System flash (Read/Write)Configuration register is 0x2102