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

Loading ...

4. Serial Port, Host, Device and User Conﬁguration

4.1.8 USB Consoles

B093, B097, and B098 model console servers running ﬁrmware 3.16.5 or later support USB console connections to devices

from a wide range of vendors, including Cisco, HP, Dell and Brocade. All the USB ports on these console servers can also

function as plain RS-232 serial ports when a USB-to-serial adapter is connected.

These USB ports are available as regular port manager ports and are presented numerically in the web UI after all RJ45 serial

ports.

The RJ45 serial ports are presented in Serial & Network > Serial Port.

The common settings (baud rate, etc.) are used when conﬁguring the ports. Some operations (e.g., sending serial breaks) may

not work, depending on the implementation of the underlying USB serial chip.

4.1.9 Link Layer Discovery Protocol (LLDP)

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

physically connected to managed switches. It is available for use on B093-Series devices.

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 through

System > IP.

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

the console manager is sending information.

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.

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.

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 saved in /etc/conﬁg/ on Tripp Lite hardware. It is not safe to save 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.

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

ﬁrmware version.

LLDP frames are not passed through by 802.3ab compliant switches. Tripp Lite Console Managers have the LLDP service

disabled by default.

Both lldpd and lldpcli have standard manual pages but because of space concerns, these pages are not shipped with

Tripp Lite hardware. However, both manual pages are available on the lldpd project: man lldpd can be found at

https:// vincentbernat.github.io/lldpd/usage.html#lldpd8; and man lldpcli can be found at

https:// vincentbernat.github.io/lldpd/usage.html#lldpcli8.

Note: Tripp Lite uses lldpd 0.9.2.

Loading ...

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