12.1(12C)EA1新特性：
SSH支持：
crypto key generate rsa
ip ssh authentication-retries 3
ip ssh timeout30
AutoQos，仅EI特性集可使用:
int fa0/24
auto qos voip cisco-phone
int g0/1
auto qos voip trust
可以通过Radius对802.1x的端口分配VLAN：
switch端：
aaa new-model
aaa authen dot1x default group radius
aaa author network default group radius
radius-server host 10.1.1.1 auth-port 1912 key hehehe
int fa0/1
dot1x port-control auto
radius server端：
[64]Tunnel-Type=VLAN
[65]Tunnle-Medium-Type=802
[66]Tunnel-Private-Group-ID= VLAN NAME
dot1x可以和port security同时配置在同一端口上：
aaa new-model
aaa authen dot1x default group radius
aaa author network default group radius
radius-server host 10.1.1.1 auth-port 1912 key hehehe
int fa0/1
dot1x port-control auto
dot1x multiple-hosts
switchport mode Access
switchport port--security
switchport port--security max 10
switchport port--security mac-add sticky
switchport port--security violation protect
DOT1X可以和Voice VLAN配置在同一端口上：
aaa new-model
aaa authen dot1x default group radius
aaa author network default group radius
radius-server host 10.1.1.1 auth-port 1912 key hehehe
int fa0/1
dot1x port-control auto
switchport mode access
switchport access vlan 10
switcport voice vlan 25
spanning-tree portfast
12.1(13)EA1的新特性：
支持SPAN；
支持PVRST+(rapid的STP)
作者:juechen70