3com MSR 20-20 참조 매뉴얼

This command allows you to log active flows regularly. This solves the problem of 
logging long-last active sessions as logs are normally generated only when a 
session is established or deleted.

# Configure the interval between sending NAT active-flow logs as 10 minutes.

<Sysname> system-view

[Sysname] nat log flow-active 10 

# Delete the configured interval.

<Sysname> system-view

[Sysname] undo nat log flow-active 

System view

None

Use the nat log flow-begin command to generate NAT logs while establishing a 
NAT session.

Use the undo nat log flow-begin command to restore the default.

By default, no log is generated when establishing a session.

# Generate NAT log while establishing a session.

<Sysname> system-view

[Sysname] nat log flow-begin 

nat outbound acl-number [ address-group group-number [ no-pat ] ]

undo nat outbound acl-number [ address-group group-number [ no-pat ] ]

Interface view

address-group: Specifies an address pool for NAT. If no address pool is specified, 
the interface IP address will be used, that is, the Easy IP feature.

acl-number: ACL (including both the basic and the advanced) number, in the 
range 2,000 to 3,999.