HP V1910 User Manual

290
2 describes roles of the ports shown in a.
2. Roles of ports
Device Untrusted port
Trusted port disabled from
recordin
g
bindin
g
entries
Trusted port enabled to
record bindin
g
entries
Switch A GigabitEthernet 1/0/1 GigabitEthernet 1/0/3 GigabitEthernet 1/0/2
Switch B
GigabitEthernet 1/0/3 and
GigabitEthernet 1/0/4
GigabitEthernet 1/0/1 GigabitEthernet 1/0/2
Switch C GigabitEthernet 1/0/1
GigabitEthernet 1/0/3 and
GigabitEthernet 1/0/4
GigabitEthernet 1/0/2
DHCP snooping support for Option 82
Option 82 records the location information of the DHCP client. The administrator can locate the DHCP client
to further implement security control and accounting. For more information, see the chapter “DHCP
overview”.
If DHCP snooping supports Option 82, it will handle a client’s request according to the contents defined in
Option 82, if any. The handling strategies are described in the table below.
If a reply returned by the DHCP server contains Option 82, the DHCP snooping device will remove the
Option 82 before forwarding the reply to the client. If the reply contains no Option 82, the DHCP snooping
device forwards it directly.
If a client’s requesting
messa
g
e has…
Handling
strate
gy
The DHCP snooping device will…
Option 82
Drop Drop the message.
Keep Forward the message without changing Option 82.
Replace
Forward the message after replacing the original Option 82
with the Option 82 padded in normal format.
no Option 82 —
Forward the message after adding the Option 82 padded in
normal format.
DHCP snooping configuration task list
Complete the following tasks to configure DHCP snooping:
Task Remarks
Enabling DHCP snooping
Required
By default, DHCP snooping is disabled.

HP V1910 Specifications

General

Switching Capacity	56 Gbps
Forwarding Rate	41.7 Mpps
Manageable	Yes
Form Factor	Rack-mountable
Features	VLAN, QoS, Link Aggregation
Operating Temperature	0°C to 45°C
Operating Humidity	10% to 90% (non-condensing)
Ports	24 x 10/100/1000 + 4 x SFP