
Industrial Managed
Ethernet Switch
User Manual
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Figure 2.164 Example of LLDP Neighbors Webpage
Table 2.60 Descriptions of LLDP Neighbors Webpage
Label
Description
Port
Indicates particular port number of the switch
.
Chassis ID
Indicates the identity of the neighbor of this particular port
.
Port ID
Indicates the port number of this neighbor
.
Port Description
Shows a textual description of the neighbor port
.
Device Name
Indicates the device name/
hostname of the neighbor
.
Device Description
Shows a more detailed description of the neighbor
’s device
.
Management
Address
Indicates neighbor
’s management IP address
.
2.17 UDLD
The Uni Directional Link Detection (UDLD) protocol is a protocol that can be used to prevent Layer-2 switching
loops in the network. The network loop problem usually occurs in Spanning Tree network topology (miswiring or
malfunction of the network interface). UDLD is a data link layer (Layer-2) protocol that keeps track of physical layer
configuration (fiber or copper). It helps detect switching loops and one-way connections. UDLD protocol requires
that two neighboring switches UDLD packets to detect the unidirectional link. UDLD packets are transmitted
periodically (hello interval) to its neighbor switches on LAN ports that has UDLD protocol enabled. If the UDLD
packets are not echoed back within a specific time, the port will be shut down and flagged as unidirectional link.
ATOP
’s EH75XX supports this protocol: the user can configure it under the UDLD menu as shown in Figure 2.165.
Under the
UDLD
menu, there are three submenus:
Setting
,
Port-info
, and
Reset
.
Figure 2.165 UDLD Dropdown Menu