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Cisco라우터나 스위치의 IOS에 관해서 알아보겠습니다.

예를 들면

             c2500-is-l.113-11c.bin

                화일이름      버젼

IOS 화일이름을 보면 xxxx-yyyy-ww 보통 이런 형식을 가지고 있는데요.

맨처음 xxxx = Platform
다음  yyyy = Feature
마지막 ww = 어디로 부터 IOS가 실행되는가, 또는 압축 유무

Platform

as5200 5200
cpa25 CiscoPro 2500
c1005 1005
c2500 25xx, 3xxx, 5100, AP (11.2 and later only)
c2600 2600 Quake platform
c2800 Catalyst 2820
c2900 2910, 2950
c3620 3620
c3640 3640
c4000 4000 (11.2 and later only)
c4500 4500, 4700
c5rsm Catalyst 5000 RSP platform
c5atm Catalyst 4000 ATM platform
c7000 7000, 7010 (11.2 and later only)
c7200 7200
igs IGS, 25xx, 3xxx, 5100, AP
gs7 gateway server (7000, 7010)
mc3810 Ardent Multiservice Cisco 3810 platform
rsp 75xx
xx 4000

Feature

a - APPN
a2 - ATM
b - Appletalk
boot - used for boot images
c - Comm-server/Remote Access Server(RAS) subset (SNMP, IP, Bridging, IPX,
          AT, Decnet, FR, HDLC, PPP, X.25, ARAP, tn3270, PT, XRemote, LAT)
c - Comm-server Lite(CiscoPro)
c2 - Comm-server/Remote Access Server(RAS) subset
d - Desktop subset (SNMP, IP, Bridging, WAN, Remote Node, Terminal Service,
                   IPX, AT, ARAP)
d2 - reduced Desktop subset (SNMP, IP, IPX, AT, ARAP)
eboot - ethernet boot image for mc3810 platform
f - FRAD subset (SNMP, FR, PPP, SDLLC, STUN)
f2 - modified FRAD subset (EIGRP, Pcbus, Lan Mgr, removed, OSPF added)
g - ISDN subset (SNMP, IP, Bridging, ISDN, PPP, IPX, AT)
g2 - gatekeeper proxy, voice and video
i - IP subset(SNMP, IP, Bridging, WAN, Remote Node, Terminal Service)
i2 - subset similar to IP subset for system controller image(3600)
i3 - reduced IP subset with BGP/MIB, EGP/MIB, NHRP, DIRRESP removed
j - enterprise subset (formerly bpx, includes protocol translation)
    **10.3까지는 사용되지 않음
k - kitchen sink (enterprise for high-end) **10.3이후에는 사용되지 않음
l - IPeXchange IPX, static routing, gateway
m - RMON (11.1 only)
n - IPX
o - FIrewall (Formerly IPeXchange Net Management)
p - Service Provider (IP RIP/IGRP/EIGRP/OSPF/BGP, CLNS, ISIS/IGRP)
p2 - Service Provider w/CIP2 ucode
p3 - AS5200 service provider
p4 - 5800(Nitro) service provider
q - Async
q2 - IPeXchange Async
r - IBM base option (SRB, SDLLC, STUN, DLSW, QLLC) - i, in, d 와 같이 사용
r2 - IBM variant for 1600 images
r3 - IBM variant for Ardent images (3810)
r4 - reduced IBM subset with BSC/MIB, BSTUN/MIB, ASPP/MIB, RSRB/MIB removed
s - source route switch (SNMP, IP, Bridging, SRB) (10.2 and following)
s - (11.2 only) addition to the basic subset (Plus version)

c1000 - (OSPF, PIM, SMRP, NLSP, ATIP, ATAURP, FRSVC, RSVP, NAT)
c1005 - (X.25, full WAN, OPSPF, PIM, NLSP, SMRP, ATIP, ATAURP, FRSVC, RSVP, NAT)
c1600 - (OSPF, IPmulticast, NHRP, NTP, NAT, RSVP, FRSVC)
c2500 - (NAT, RMON, IBM, MMP, VPDN/L2F)
c2600 - (NAT, IBM, MMP, VPDN/L2F, VoIP and ATM)
c3620, 3640 - (NAT, IBM, MMP, VPDN/L2F) in 11.3T added VoIP
c4500 - (NAT, ISL, LANE, IBM, MMP, VPDN/L2F)
c5200 - (PT, v.120, managed modems, RMON, MMP, VPDN/L2F)
c5300 - (MMP, VPDN, NAT, managed modems, RMON, IBM)
c5rsm - (NAT, LANE and VLANS)
c7000 - (ISL, LANE, IBM, MMP, VPDN/L2F)
c7200 - (NAT, ISL, IBM, MMP, VPDN/L2F)
rsp - (NAT, ISL, LANE, IBM, MMP, VPDN/L2F)
t - (11.2)AIP w/ modified Ucode to connect to Teralink 1000 Data
u - IP with VLAN RIP (Network Layer 3 Switching Software, rsrb, srt, srb, sr/tlb)
v - VIP and dual RSP(HSA) support
w - Reserved for WBU
w2 - Reserved for CiscoAdvantage ED train
w3 - Reserved for Distributed Director
x - X.25 in 11.1 and earlier release
y - reduced IP (SNMP, IP RIP/IGRP/EIGRP, Bridging, ISDN< PPP) (C1003/4)
- reduced IP (SNMP, IP RIP/IGRP/EIGRP, Bridging, WAN - X.25) (C1005)
(11.2 - includes X.25) (C1005)
y - IP variant (no Kerberos, Radius, NTP, OSPF, PIM, SMRP, NHRP...) (C1600)
y2 - IP variant (SNMP, IP RIP/IGRP/EIGRP, WAN - X.25, OSPF, PIM) (C1005)
y2 - IP Plus variant (no Kerberos, Radius, NTP...) (C1600)
y3 - IP/X.31
Y4 - reduced IP variant (Cable, Mibs, DHCP, EZHTTP)
z - managed modems
40 - 40 bit encrytion
56 - 50 bit encryption
56i - 56 bit encryption with IPSEC

어디로 부터 IOS가 실행되는가, 또는 압축 유무

f - Flash
m - RAM
r - ROM
l - relocatable
z - zip compressed
x - mzip compressed

출처 - NRC NTSE (http://home.freechal.com/ntse/)