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lldpd

BSD mandoc

NAME

lldpd - LLDP daemon

SYNOPSIS

[-dxcseikl ] [-S description ] [-X socket ] [-m management ] [-M class ] [-H hide ]

DESCRIPTION

is a daemon able to receive and send LLDP frames. The Link Layer Discovery Protocol is a vendor-neutral Layer 2 protocol that allows a network device to advertise its identity and capabilities on the local network.

also implements an SNMP subagent using AgentX protocol to interface to a regular SNMP agent like Net-SNMP. To enable this subagent, you need something like that in your snmpd.conf5:

 master agentx
 

This daemon implements both reception and sending. It will collect various information to send LLDP frames to all Ethernet interfaces, including management address, speed and VLAN names.

The options are as follows:

-d

Do not daemonize. If this option is specified, will run in the foreground and log to stderr This option can be specified many times to increase verbosity.

-k

Disable advertising of kernel release, version and machine. Kernel name (ie: Linux) will still be shared, and Inventory software version will be set to 'Unknown'.

-S description

Override system description with the provided description. The default description is the kernel name, the node name, the kernel version, the build date and the architecture (except if you use the -k flag described above).

-x

Enable SNMP subagent. With this option, will enable an SNMP subagent using AgentX protocol. This allows to get information about local system and remote systems through SNMP.

-X socket

Enable SNMP subagent using the specified socket. will enable an SNMP subagent using AgentX protocol for the given socket. This option implies the previous one. The default socket is usally /var/agentx/master You can specify a socket like tcp:127.0.0.1:705 for example. Since the process that will open this socket is enclosed in a chroot, you need to specify an IP address (not a hostname) when using a TCP or UDP socket.

-c

Enable the support of CDP protocol to deal with Cisco routers that do not speak LLDP. If repeated, CDPv1 packets will be sent even when there is no CDP peer detected.

-f

Enable the support of FDP protocol to deal with Foundry routers that do not speak LLDP. If repeated, FDP packets will be sent even when there is no FDP peer detected.

-s

Enable the support of SONMP protocol to deal with Nortel routers and switches that do not speak LLDP. If repeated, SONMP packets will be sent even when there is no SONMP peer detected.

-e

Enable the support of EDP protocol to deal with Extreme routers and switches that do not speak LLDP. If repeated, EDP packets will be sent even when there is no EDP peer detected.

-l

Force to send LLDP packets even when there is no LLDP peer detected but there is a peer speaking another protocol detected. By default, LLDP packets are sent when there is a peer speaking LLDP detected or when there is no peer at all.

-m management

Specify the management address of this system. only sends one management address. It will use the first one that it finds or the one that you specify with this option. This option can use wildcards.

-M class

Enable emission of LLDP-MED frame. The class should be one of the following value:

1

Generic Endpoint (Class I)

2

Media Endpoint (Class II)

3

Communication Device Endpoints (Class III)

4

Network Connectivity Device

-i

Disable LLDP-MED inventory TLV transmission. will still receive (and publish using SNMP if enabled) those LLDP-MED TLV but will not send them. Use this option if you don't want to transmit sensible information like serial numbers.

-H hide

In a heterogeneous network, you may see several different hosts on the same port, even if there is only one physically plugged to this port. For example, if you have a Nortel switch running LLDP which is plugged to a Cisco switch running CDP and your host is plugged to the Cisco switch, you will see the Nortel switch as well because LLDP frames are forwarded by the Cisco switch. This may not be what you want. The -H hide parameter will allow you to tell to discard some frames that it receives and to avoid to send some other frames. The rationale behind the possible modes is that we should guess which protocol the equipment we are linked with is speaking. Moreover, it can speak several protocols. The main idea used is that if we receive on one port one CDP frame and three LLDP frames, we assume that the equipment is speaking CDP and that LLDP frames are just flooded through this equipment. The possible values are:

0

Do not be smart, do not filter any frame

1

For each port, get the protocol with less neighbors and use only this protocol for reception and sending; in case of a tie, LLDP protocol wins. This is the default mode.

2

For each port, get the protocol with less neighbors and use only this protocol for reception; in case of a tie, LLDP protocol wins. No frame is filtered when sending.

3

For each port, get the protocol with less neighbors and use only this protocol for sending; in case of a tie, LLDP protocol wins. No frame is filtered on reception.

4

Same as 1 but in case of a tie, both protocols win.

5

Same as 2 but in case of a tie, both protocols win.

6

Same as 3 but in case of a tie, both protocols win.

7

Same as 1 but only one neighbor is kept.

8

Same as 2 but only one neighbor is kept.

9

Same as 3 but only one neighbor is kept.

FILES

/var/run/lldpd.socket

Unix-domain socket used for communication with lldpctl(8).

SEE ALSO

lldpctl(8), snmpd(8)

HISTORY

The program is inspired from a preliminary work of Reyk Floeter.

AUTHORS

An -nosplit The program was written by An Pierre-Yves Ritschard Aq pyr@openbsd.org , and An Vincent Bernat Aq bernat@luffy.cx .