I had problem with port security I configured port security for interface has 2 devices connected (ipphone+ pc) , Ip phone is working fine but pc is restricted and couldn't get an IP address   this is my configuration for the port : interface GigabitEthernet1/0/3  switchport access vlan 234  switchport mode access  switchport voice vlan 245  switchport port-security maximum 4  switchport port-security  switchport port-security violation restrict  switchport port-security mac-address sticky  switchport port-security mac-address sticky 0024.1d7e.5931  switchport port-security mac-address sticky 6899.cd84.e97a vlan voice   ----------------------------------------- sh port-security int g1/0/3 Port Security              : Enabled Port Status                : Secure-up Violation Mode             : Restrict Aging Time                 : 0 mins Aging Type                 : Absolute SecureStatic Address Aging : Disabled Maximum MAC Addresses      : 4 Total MAC Addresses        : 2 Configured MAC Addresses   : 0 Sticky MAC Addresses       : 2 Last Source Address:Vlan   : 0024.1d7e.5931:234 Security Violation Count   : 0 ... View more

I had 2 macs ( ipphone+pc) connected on same interface on cisco switch both configured as sticky and maximum 2 as below:   int g1/0/3 switchport port-security switchport port-security max 2 switchport port-security violation restrict  switchport port-security mac-address sticky   the issue is Ip-phone works fine but pc couldn't get ip address related to violation  , could anyone recommend troubleshooting commands to solve this ??   ... View more