I'm facing a problem, and i've also tried to workaround but not sucessfully. I've got a polycom phone on the swich. When I connect a laptop on that port, the mac address is learned by the switch and keep the mac address even if I disconnect the ethernet cable from that port and if I try to connect the same laptop on other port on the same switch I've got errdisable error in the last connected port.
Although I was figuring out what's wrong and seems that the mac address is kept for some reason in the first port. Sw02#show mac address-table interface f0/19 Mac Address Table - Vlan Mac Address Type Ports - - - - 60 3c07.5417.9069 STATIC Fa0/.f21e.afa7 STATIC Fa0/19 this is a 2960, Version 12.2(44r)SE4 with a Polycom SoundPoint IP 330 connected on vlan 80 I was searching to clear the mac address table on that interface but the IOS version didn't give me the static option sw02#clear mac address-table? Dynamic dynamic entry type move move keyword notification Clear MAC notification Global Counters As there's no dynamic entries on that interface the mac addresses remain on the f0/19 interface. I've tried with other switches and with other laptops and is the same errdisable status. Sw02#show run int f0/19 interface FastEthernet0/19 description VoIP switchport access vlan 60 switchport mode access switchport nonegotiate switchport voice vlan 80 switchport port-security maximum 5 switchport port-security no snmp trap link-status ip dhcp snooping limit rate 100 end any thought?
That command worked fine. Tks Although as soon as I connect the laptop behind a VoIP phone with port-security enabled, the MAC Address of the laptop is kept in the interface mac address table even if I disconnect the laptop from the port, even if I wait 10minutes, 1 hour, 1 day. So I was unable to reconnect the laptop on the same switch because the switch already learned the mac address in the first port.
It's only working when I manually clear the mac address from the port, but I guess the switch should learn and forget the connected mac addresses dynamically. I can't understand why this is happening. The mac addresses are not manually configured. Yes, that's my point. When I disconnect the ethernet cable the mac addresses are not flushed from the mac table.
Although I don't understand why the mac addresses are kept in the interface, if I force the interface aging time to 1 min, the problem don't occur anymore. I was reviewing the switch config and I've got ports with aging time 0 (that learn and flush the mac addresses dynamically) and I've got ports with aging time 1 (that learn and flush the mac addresses at the end of 60 seconds) The problem is solved although I need to investigate this issue in other switch models and with other voip phones. Tks Jon and Julio.
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