1．Interface Authentication
R1=======================================
router isis
net 49.0000.0000.0001.00
int lo 0
ip add 1.1.1.1 255.255.255.255
ip router isis
int e0/0
no sh
ip add 12.1.1.1 255.255.255.0
ip router isis
isis password cisco
R2===========================================
router isis
net 49.0000.0000.0002.00
int lo 0
ip add 2.2.2.2 255.255.255.255
ip router isis
int e0/0
no sh
ip add 12.1.1.2 255.255.255.0
ip router isis
isis pass cisco
=================================================
2.Area Authentication
R1=============================
int e0/0
no isis pass cisco
router isis
area-password cisco
R2===================================
int e0/0
no isis pass cisco
router isis
area-password cisco
3.Domain Authentication
R1=================================
router isis
no area-password
domain-password cisco
no net 49.0000.0000.0001.00
net 47.0000.0000.0001.00
R2================================
router isis
no area-password
domain-password cisco
MD5====================================================