Chapter 6:
Alerts, Auto-Response & Logging
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the lldpd daemon. LLDPd is also configured by default to broadcast CDP packets, and monitor both LLDP
and CDP neighbours.
When LLDP is granted access to an interface, it uses 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 heard,
and also indicates the information that the console manager is sending.
NOTE
LLDP service can be granted access to non-ethernet interfaces (for example, G3, G4 and PSTN
dial-up interfaces), but 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 — is
read and executed by lldpcli when the LLDP service starts.
NOTE
On Opengear hardware:
•
The /etc/ directory is read-only. Most default configuration files otherwise stored in /etc/ are in
/etc/config/, which is writeable.
•
The default lldpd configuration file — lldpd.conf — is stored in /etc/config/. It is not a safe location
to store custom configuration details. There are circumstances in which this file is regenerated
automatically, in which customizations will be lost.
•
The etc/config/lldpd.d/ directory, which is writable and is 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 an Opengear Console Manager reveals sensitive information such
as hostname and firmware version.
LLDP frames are not passed through by 802.3ab compliant switches, and Opengear Console Managers
have the LLDP service disabled by default.
Documentation
Both lldpd and lldpcli have standard man pages but, because of space concerns, these man pages are not
shipped with Opengear hardware.
Both man pages are available on the lldpd project web-site:
man lldpd.
man lldpcli.
6.2.9
Cellular Data
Before configuring cellular data checks in Auto-Response the internal cellular modem must be configured
and detected by the console server.
This check monitors the aggregate data traffic inbound and outbound through the cellular modem as an
Auto-Response trigger event.
Click on
Cellular Data
as the
Check Condition
