LLDP

LLDP (Link Layer Discovery Protocol) is a link-layer protocol defined by IEEE 802.1AB. Directly connected neighbors use it to exchange information about network devices. Peresvet ST emulates an LLDP agent that periodically transmits LLDP frames (LLDPDUs) to the standard multicast MAC address 01:80:c2:00:00:0e. This lets the DUT discover the emulated device, its identifiers, and its capabilities.

Basic LLDP Settings

Field	Description	Default
Enable LLDP	Enable or disable LLDP	Off
Chassis ID subtype	Chassis identification method: MAC address, Network address, Interface name, or Locally assigned	MAC address
Chassis ID	Chassis identifier. For MAC address, the interface MAC address; for Locally assigned, an arbitrary string	Interface MAC address
Port ID subtype	Port identification method: MAC address, Interface name, or Locally assigned	MAC address
Port ID	Port identifier. For MAC address, the interface MAC address; for Interface name, the interface name	Interface MAC address
System Name	System name sent in the System Name TLV	—
System Description	System description sent in the System Description TLV	—
Port Description	Port description sent in the Port Description TLV	—

LLDP Timers

Field	Description	Default
TX Interval (s)	Interval between LLDP frames, in seconds	30
TX Hold Multiplier	Multiplier that defines the LLDP frame TTL: TTL = TX Interval × TX Hold Multiplier	4
TTL (s)	Lifetime of LLDP information at the receiver, calculated automatically from TX Interval and TX Hold Multiplier. The neighbor becomes unavailable when the TTL expires	120

System Capabilities

This section specifies the capabilities advertised by the emulated device in the System Capabilities TLV.

Field	Description	Default
Supported Capabilities	Supported device capabilities: Other, Repeater, Bridge, WLAN Access Point, Router, Telephone, DOCSIS Cable Device, Station Only	Router
Enabled Capabilities	Active device capabilities, which must be a subset of supported capabilities	Router

Management Address

Configures the management address advertised in the Management Address TLV. This lets the DUT learn the IP address used to manage the emulated neighbor.

Field	Description	Default
Management Address	Management IP address, for example 10.10.10.2	Interface IP address
Address Subtype	Management address type: IPv4 or IPv6	IPv4
Interface Subtype	Interface type: ifIndex or System port number	ifIndex
Interface Number	Numeric interface identifier	0