Some MAC unable to Communicate

[1028]

hi,
i have some question related MAC address. i'm working networking device maufacturing company, and developed a L2 switch. but, our L2 switch seems unable to communicate its Gateway with certain MAC addresses; we connected our L2 switch to L3 switch (this is commertial product from a well-known company) on its uplink, and PC to one of downlink ports of our L2 switch. for MAC address of our L2 switch, we use the first 3 octet from the IEEE assigned OUI, and for the last 3 octet, we assigned arbitrarily. And, with some MAC address, the PC can get the Internet access. But, with some other MAC, the PC cannot get access to the Internet. Anyone, can anyone guess what might cause this type of problem? thank you.

 

[opediggitty]

What are you changing the MAC address on exactly, the PC or the switch and how?

 

[1028]

i changed the switch's MAC; we made our switch so that we can configure the MAC on its CLI prompt; it might be sound odd, but at this development stage, we need to do this way. thank you.

 

[opediggitty]

In that case I would need to know if you are changing the MAC of the entire switch or which port of the switch you were trying to change. Each port is assigned a different MAC.

 

[jimbopalmer]

on a layer 2 switch only the management port should need a MAC address, right?

I tried to remain child-like, all I acheived was childish.

 

[1028]

the switch is using only one MAC for the entire ports. and, the switch has its IP assigned.

 

[opediggitty]

Most of the high end switches that I have worked with like Cisco or 3Com have a MAC assigned to each port which allows each to port to have its own collision domain with the client unless of course you are full duplex which is most likely the case.

 

[1028]

is the reason why each port has its own MAC assigned that each port can be assigned its own IP address? so, if the switch can have only one IP address configured, should i still need each MAC for each port? if so, why?