关于Cisco IOS命名,下面是一些IOS的名称:
c2500-is-l.122-15.T16.bin
c2500-is-l.121-27.bin
c2600-js-mz.122-31.bin
c3640-jk9o3s-mz.122-31.bin
c2600-ik9o3s-mz.122-31.bin
c2500-c-l.120-28.bin
c4500-a3jk9s-mz.122-29.bin
c2950-i6k2l2q4-tar.121-20.EA1.bin
首先说说IOS的运行平台,c2500、c2600、c4500、c2950代表运行此IOS的硬件平台,例如:C2500指2500系列路由器。
其次,看看IOS的版本,IOS有主版本号:11.0、11.1、11.2、11.3、12.0、12.1、12.2、12.3、12.4等,这些主版本号相当于windows的版本有win98、win2000、winxp、win2003。
当Cisco发布了某个主版本号的IOS以后,它会对它进行维护(仅修正bug,不添加新功能),每维护一次,维护版本号加1。例如c2500-is-l.121-27.bin中的“121-27”代表主版本号为12.1,维护了27次。
当一个主版本号的IOS发布一段时候后,Cisco会放出基于该主版本的下一版本IOS的测试版,IOS名字后面会加上“T”字,例如:c2500-is-l.122-15.T16.bin,当正式发布的时候,它将成为12.3版本。
其它的字母代表IOS的特性集(即IOS的功能,例如:winxp分home版、professional版、media center版等等),下面列出重要的。
a2
ATM
a3
SNA Switching (APPN replacement)
c
CommServer/Remote Access Server (RAS) subset (Simple
Network Management Protocol (SNMP), IP, Bridging,
Internetwork Packet Exchange (IPX), AppleTalk, Decnet,
Frame Relay, High−Level Data Link Control (HDLC),
Point−to−Point Protocol (PPP), X, 25, AppleTalk Remote
Access Protocol (ARAP), TN3270, PT, XRemote,
Local−area Transport (LAT))
g
ISDN subset (SNMP, IP, Bridging, ISDN, PPP, IPX, AppleTalk)
i
IP subset (SNMP, IP, Bridging, WAN, Remote Node, Terminal
Services)
j
Basic Enterprise for c2600/c3600
k8
Less than or equal to 64−bit encryption. On Cisco IOS Software
Release 12.2 and up.
k9
Greater than 64−bit encryption. On Cisco IOS Software Release 12.2
and up.
l
IPeXchange IPX, Static Routing, and Gateway.
l2
Layer 2 switching
o
Firewall (formerly IPeXchange Net Management)
o3
Firewall with Intrusion Detection (Firewall Phase II).
p
Service Provider (IP RIP/IGRP/EIGRP/OSPF/BGP, Connectionless
Network Service (CLNS) Intermediate System−to−Intermediate
System (IS−IS)/Interior Gateway Routing Protocol (IGRP))
s
Basic Plus