I enabled CDP on a **trunk** port of a cat6509, I also enabled the other end (cisco 3750) with cdp enable on all the interfaces,
sh cdp n on both are still empty? why? I waited good 10 min. still nothing.
3750 output
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3750#sh cdp traffic CDP counters : Total packets output: 494, Input: 0 Hdr syntax: 0, Chksum error: 0, Encaps failed: 0 No memory: 0, Invalid packet: 0, Fragmented: 0 CDP version 1 advertisements output: 0, Input: 0 CDP version 2 advertisements output: 494, Input: 0
3750#sh cdp n Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone
Device ID Local Intrfce Holdtme Capability Platform Port
6509 output
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6509#sh cdp n Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone
Device ID Local Intrfce Holdtme Capability Platform Port ID
6509#sh cdp in cat6509#sh cdp interface gig2/1 GigabitEthernet2/1 is up, line protocol is up Encapsulation ARPA Sending CDP packets every 60 seconds Holdtime is 180 seconds
6509#