some common cisco command

ip name-server xxx.xxx.xxx.xxx
sntp server hk.pool.ntp.org
clear interface virtual-access [number]
logging buffer 51200 debug
clock set 10:50:00 Oct 26 2006
clock timezone HKT 8
service timestamps debug datetime msec localtime
service timestamps log datetime msec localtime

show process cpu
show process cpu sorted

sh ip cac flow – show current traffic of specified interface**
sh ip accounting – show accumulated traffic of specified interface**
clear ip flow stats
clear counter [interface]

show process memory
show process memory sorted
show memory allocating-process totals
show memory summary
show memory statistics
show memory dead
show memory free
show memory bigger

show buffers
show buffer old


router#config t
router(config)#int vlan1
router(config-if)#ip route-cache flow
OR
router(config-if)#ip accounting (may cause memory low/exhaust, remember to deactivate!)
router(config-if)#^Z
router#sh ip cac flow

Router#reload in 5

ip nat translation tcp-timeout 300
ip nat translation udp-timeout 200
ip nat translation max-entries list 2 100
access-list 2 permit 10.1.68.173