103
Verifying the configuration
# Verify that the port roles and port states in the spanning tree status are as expected. (Details not
shown.)
LLDP configuration example
Network requirements
As shown in
, configure LLDP on Switch A and Switch B to meet the following
requirements:
•
Switch A can discover Switch B and obtain system and configuration information from Switch B.
•
Switch B cannot discover Switch A.
Figure 23 Network diagram
Configuration procedure
1.
Configure LLDP on switch A:
a.
From the navigation tree, select
Network
>
Links
>
LLDP
.
b.
Enable LLDP globally.
c.
Access the interface status page, and enable LLDP on GigabitEthernet 1/0/1.
d.
Access the interface configuration page of advanced settings to perform the following tasks:
−
Enable the nearest bridge agent function on GigabitEthernet 1/0/1.
−
Configure the interface to only receive LLDP frames.
Then, Switch A can discover neighbors.
2.
Configure LLDP on Switch B:
a.
From the navigation tree, select
Network
>
Links
>
LLDP
.
b.
Enable LLDP globally on Switch B.
c.
Access the interface status page, and enable LLDP on GigabitEthernet 1/0/1.
d.
Access interface configuration page of advanced settings to perform the following tasks:
−
Enable the nearest bridge agent function on GigabitEthernet 1/0/1.
−
Configure the interface to only transmit LLDP frames.
Then, Switch B cannot discover neighbors.
Verifying the configuration
1.
Verify that you can see information about Switch B on the LLDP neighbor information page of
Switch A. (Details not shown.)
2.
Verify that the LLDP neighbor information page of Switch B does not contain an entry for Switch
A. (Details not shown.)
DHCP snooping configuration example
Network requirements
As shown in
, configure DHCP snooping on Switch B to meet the following requirements:
•
Allow only the interface that connects to the authorized DHCP server, GigabitEthernet 1/0/1 on
Switch B, can forward packets from the DHCP server.