H3C Technologies H3C SecPath F1000-E - Manual (Page 14)

13
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Specify the source IP address for
outgoing portal packets
portal nas-ip ip-address
Optional
By default, there is no source IP
address specified for outgoing
portal packets and the IP address
of the user logon interface will be
used.
Configuring Portal Detection Functions
Configuring Detection of Online Portal Users
With online portal user detection enabled on an interface, the device will periodically send probe
packets (ARP requests currently) to the portal users of the interface to check whether the portal users are
still online, so as to timely find out portal users who get offline without logging off.
• If the device receives a reply from a portal user before sending probe packets to the portal user for
the maximum number of times, it considers that the portal user is online and will keep sending
probe packets to the portal user.
• If the device receives no reply from a portal user after sending probe packets to the portal user for
the maximum number of times, it considers that the portal user is offline and will stop sending probe
packets to the portal user and delete the user.
Follow these steps to configure the online portal user detection function:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Configure the online portal user
detection function
access-user detect type arp
retransmit number interval
interval
Required
Not configured by default
NOTE:
Adjust the maximum number of transmission attempts and the interval of sending probe packets
according to the actual network conditions.
Configuring the Portal Server Detection Function
During portal authentication, if the communication between the access device and portal server is
broken off, new portal users will not be able to log on and the online portal users will not be able to log
off normally. To address this problem, the access device needs to be able to detect the reachability
changes of the portal server timely and take corresponding actions to deal with the changes. For