i have a strange behavior in my switch environment..
i have a 3750x switch stack which is the core switch in my network
there are some 2960s client switches with port-channel connected to that core switch
the core switch have different vlan interfaces. vlan1 for workstations and servers, vlan506 for management.
the client switches only have an management vlan interface (id506) - the native vlan1 is shutdown.
as i say, servers and workstations are located in vlan1. when i connect from a workstation, which have an ip address from vlan1, to the client switch and take an configuration backup using tftp on that workstation, the client switch insert an arp entry for this workstation - located in vlan1 - where the client switch dosent have an ip address..
when i troubleshoot this problem, i first see the mac address from the core switch vlan 506 interface and the ip address from the client in the arp table.
after few minutes the switch change the mac address to the real mac of the client..
this is strange because of arp.. the switch should not have arp entries from a layer3 interface in which he dosent have an ip adress.. am i right??
thank you in advance for your help, best regards and stay happy!