CDP LLDP

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http://youtube.com/watch?v=T9RRhlZODm4

Configure and verify Layer 2 protocols • CDP: • Cisco Discovery Protocol • CDP is a layer two discovery protocol • CDP is Cisco Proprietary protocol • CDP use TLVs (Type, Length, Value) to send and receive information to their directly connected neighbors. • CDP message contains information about Device ID, IP address, port ID, VLAN and hardware platform. • CDPv2 allows switch ports configured with a voice vlan. • CDP announcements are send to the multicast destination address • 01-00-0c-cc-cc-cc on each interface • CDP is enable by default • CDP advertisements are sent every 60 sec • CDP hold time advertised is 180 seconds • Globally enable CDP • SW(config)#cdp run • Globally disable CDP • SW(config)#no cdp run • Enable CDP on an interface • SW(config-if)#cdp enable • Enable CDP version 2 • SW(config)# cdp advertise-v2 • SW# show cdp neighbors • SW# show cdp entry * • SW# show cdp traffic • SW# show cdp • SW# show cdp interface • SW(config)#cdp timer time_ in_ second • SW(config)#cdp holdtime time_ in_ second • LLDP: • Link Layer Discovery Protocol • LLDP is a layer two discovery protocol • LLDP is a standard protocol • LLDP use TLVs Type, Length, Value to send and receive information to their directly connected neighbors. • CDP message contains information about port, system name, system capabilities, management address. • LLDP allows switch ports configured with a voice vlan. • LLDP announcements are send to the multicast destination address • 01-80-C2-00-00-0e on each interface • LLDP is disabled by default • LLDP advertisements are sent every 30 sec • LLDP hold time advertised is 120 seconds • Globally enable LLDP • SW(config)#lldp run • Globally disable LLDP • SW(config)#no lldp run • Enable LLDP on an interface • SW(config-if) #lldp transmit • SW(config-if)#lldp receive • SW# show lldp neighbors • SW# show lldp entry * • SW# show lldp traffic • SW# show lldp • SW# show lldp interface • SW(config)#lldp timer time_ in_ second • SW(config)#lldp holdtime time_ in_ second

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