Tripp Lite B093-004-2E4U-V Owner's Manual

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7. Alerts, Auto-Response and Logging

7.2.8 Link Layer Discovery Protocol (LLDP)

The Link Layer Discovery Protocol (LLDP) is a protocol that allows system administrators to glean information about devices

physically connected to managed switches.

Using LLDP

The LLDP service is enabled through the System > Services page. When the service is enabled, the lldpd daemon is loaded

and running. The Service Access tab controls which network interfaces are monitored by the lldpd daemon.

When LLDP is granted access to an interface, it will use that interface, even if the interface has been disabled via System >

IP.

LLDP neighbors are visible through the Status > LLDP Neighbors page. This page shows neighbors are recognized and

indicates the information the console manager is sending.

Note: Although the LLDP service can be granted access to non-Ethernet interfaces (for example, G3, G4 and PSTN dial-up interfaces), it

currently ignores non-Ethernet interfaces.

Customising LLDP

The lldpcli shell client interacts with and conﬁgures the running LLDP service.

Persistent custom conﬁguration changes can be added to the system through conﬁguration ﬁles placed in /etc/conﬁg/lldpd.d/.

Custom conﬁguration ﬁles — which must have ﬁlenames ending with .conf — will be read and executed by lldpcli when the

LLDP service starts.

Note: The /etc/ directory is read-only on Tripp Lite hardware. Most default conﬁguration ﬁles otherwise stored in /etc/ are, on Tripp Lite

hardware, in /etc/conﬁg/, which is writeable.

The default lldpd conﬁguration ﬁle — lldpd.conf — is stored in /etc/conﬁg/ on Tripp Lite hardware. However, it is not safe as a store of

custom conﬁguration details. There are circumstances in which this ﬁle is regenerated automatically, in which case all customizations will be

lost.

The etc/conﬁg/lldpd.d/ directory, which is also writable and created on ﬁrst boot, is safe to write to. Any Custom LLDP conﬁgurations must be

stored as *.conf ﬁles in this directory.

Security

When enabled, LLDP frames issued by a Tripp Lite Console Manager will reveal sensitive information, such as hostname and

ﬁrmware version.

However, LLDP frames are not passed through by 802.3ab compliant switches, and Tripp Lite Console Managers have the

LLDP service disabled by default.

Documentation

Both lldpd and lldpcli have standard manual pages. However, due to space constraints, these manual pages are not shipped

with Tripp Lite hardware.

Both manual pages are available on the lldpd project web-site however:

man lldpd.

man lldpcli.

Note: Tripp Lite uses lldpd 0.9.2.

7.2.9 Cellular Data

This check monitors the inbound and outbound aggregate data trafﬁc through the cellular modem as an auto-response trigger

event.

• Click on Cellular Data as the Check Condition.

Note: Before conﬁguring cellular data checks in auto-response, the internal cellular modem must be conﬁgured and detected by the

console server.

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Tripp Lite B093-004-2E4U-V 4-Port Console Server with 4G LTE Cellular Gateway, Dual GbE NIC, 4Gb Flash and Dual SIM