# discovery-settings > RouterOS settings reference for /ip/neighbor/discovery-settings. ----------- ## ip/neighbor/discovery-settings **Type:** Settings Directory Interface list whose members the discovery protocol will run on. Default: static. Frequency at which neighbor discovery packets are transmitted. Also adjusts the TTL TLV value for CDP and LLDP packets using the formula: (discover-interval * 4) + 1. Range: 5s..9h6m8s. Default: 30s. Whether to advertise the LLDP-MED Media Capabilities TLV. Must be enabled when lldp-med-net-policy-vlan is used. Default: yes. Advertised VLAN ID for LLDP-MED Network Policy TLV. Allows assigning a VLAN ID for LLDP-MED-capable devices such as VoIP phones. The TLV is only added to interfaces where LLDP-MED-capable devices are discovered and lldp-med is enabled. Other TLV values (Application Type, VLAN Type, L2 Priority, DSCP Priority) are predefined. CDP should be excluded using the protocol setting to avoid LLDP-MED misconfiguration. Default: disabled. Whether to send MAC/PHY Configuration/Status TLV in LLDP, indicating interface capabilities, duplex status, bit rate, and auto-negotiation. Only applies to Ethernet interfaces. Automatically included when sending LLDP-MED. Default: no. Whether to send Maximum Frame Size TLV in LLDP, indicating the maximum frame size capability of the interface in bytes (l2mtu + 18). Only applies to Ethernet interfaces. Default: no. Whether to send IEEE 802.1 Organizationally Specific TLVs in LLDP related to VLANs. When enabled, three TLVs are advertised: Port VLAN ID (bridge port pvid), Port And Protocol VLAN ID (not supported), and VLAN Name (up to 10 active VLANs from the bridge VLAN table). Relevant to interfaces on a vlan-filtering bridge. Default: no. Whether to transmit the IEEE 802.3 Organizationally Specific Power Via MDI TLV in LLDP messages. Replaces the PoE-out port poe-lldp-enabled setting. Relevant only for Ethernet interfaces with PoE-Out support. Default: yes. Whether to transmit PoE input power TLVs in LLDP messages. Whether to send Data Center Bridging Capabilities Exchange Protocol (DCBX) TLVs, communicating switch QoS settings and capabilities with neighboring devices using LLDP. Only applies to devices with a Marvell Prestera switch (e.g. CRS3xx). Includes ETS Configuration, Priority Assignment, Bandwidth Allocation, and TSA tables. Default: no. List of discovery protocols to use. Default: cdp,lldp,mndp. Neighbor discovery packet sending and receiving mode. Default: tx-and-rx. Whether to send a neighbor discovery packet with TTL=0 before a graceful reboot, shutdown, or upgrade. Not sent in case of power loss or kernel panic. On the receiving side, a TTL=0 packet immediately removes the corresponding neighbor entry. Default: no. Whether to create dynamic DNS entries for discovered neighbors, using their identity as the domain name. Suffix added to dynamic DNS entries created for each neighbor.