The Dell would receive the frame from port g1, and see the destination MAC on two different VLANs port g1 has permissions to send to both VLANs. device on General Mode port g1 sends an untagged frame to 00-00-0c-07-ac-01.interface range g(5-6) mode General, pvid 500, add vlan 100,500 untagged.interface range g(3-4) mode General, pvid 300, add vlan 100,300 untagged.interface g1, mode General, pvid 100, add vlan 300,500 untagged.If a General Mode port receives an untagged frame, and the destination MAC exists on two different vlans, then I think that the switch would not know where to send the frame: Is it safe to use the same MAC on different VLANs if there are no General Mode ports? Or is it OK even if there are General Mode ports, provided that the overlapping MACs don't exist on VLANs which have been 'added' to any general mode ports? This is with all ports as Access Mode or Trunk Mode.

I have seen cases where there were different customers using the same MAC address, on different VLANs this was visible in 'show mac address-table' on a single PowerConnect 5324, and it seemed to be working fine. I help in a colocation facility, and many colocation customers use pairs of routers or firewalls, which have HSRP, VRRP or NSRP high-availability MAC addresses, like 00-00-0c-07-ac-01 (Cisco HSRP) or 00-00-5e-00-01-01 (VRRP) or 0010.dbff.80f0 (Juniper NSRP). If the same destination MAC lived on two VLANs, the switch would not know where to send the frame.ДЄt the same time, it is difficult for me to prevent the occurrance of the same MAC on different VLANs. If group number is 5 so 05 will be placed instead of xx as 05 is the Hexa. switch checks if ingress port has permission to transmit to destination VLAN HSRP has a MA C address 00-00-0c-07-ac-xx, 00-00-0c represents Cisco, 07ac represents HSRP and xx represents group number.switch checks which VLAN contains the destination MAC.This is necessary to support General Mode ports: That is, each MAC address can only live on one VLAN at a time on a switch. 07-15-201905:29 PM hi afo99, As you know that HSRP uses this virtual MAC address,, where xy is the HSRP group number in hexadecimal. I have been told by Dell Support that the PowerConnects have a 'single instance MAC forwarding table'.

Hsrp cisco mac address 07ac