Discovery Protocols

Cisco Discovery Protocol (CDP)

NOTE

• SNAP をサポートするメディアで動く（イーサ、FR、ATM、PPP、HDLCなど）
• マルチキャスト　01:00:0c:cc:cc:cc

Switch(config)#cdp ?
  advertise-v2     CDP sends version-2 advertisements
  filter-tlv-list  Apply tlv-list globally
  holdtime         Specify the holdtime (in sec) to be sent in packets
  run              Enable CDP
  timer            Specify the rate at which CDP packets are sent (in sec)
  tlv              Enable exchange of specific tlv information
  tlv-list         Configure tlv-list

Switch(config)#
Switch(config)#interface gigabitEthernet 0/0
Switch(config-if)#
Switch(config-if)#cdp ?
  enable           Enable CDP on interface
  filter-tlv-list  Apply tlv list filter on interface
  tlv              Enable exchange of specific tlv information

Link Layer Discovery Protocol (LLDP)

NOTE

Switch(config)#lldp ?
  holdtime    Specify the holdtime (in sec) to be sent in packets
  reinit      Delay (in sec) for LLDP initialization on any interface
  run         Enable LLDP
  timer       Specify the rate at which LLDP packets are sent (in sec)
  tlv-select  Selection of LLDP TLVs to send

Switch(config-if)#lldp ?
  med-tlv-select  Selection of LLDP MED TLVs to send
  receive         Enable LLDP reception on interface
  tlv-select      Selection of LLDP TLVs to send
  transmit        Enable LLDP transmission on interface

必須

• 機器の識別情報　chassis ID
• ポートの識別情報　Port ID
• 情報の有効期間　Time To Live

マルチキャストアドレス 01:80:c2:00:00:0e

LLDP-MED (LLDP for Media Endpoint Device)

• IP-phone とSWのような組み合わせで使うLLDP拡張
• L2、L3のQoS情報、PoE、インベントリ情報

REFERENCE

• Configuring CDP
• Configuring LLDP, LLDP-MED, and Wired Location Service