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What's my MAC addresses for my ethernet cards in my Solaris box

jjc_mn
jjc_mn asked
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Last Modified: 2013-12-27
When I type ifconfig -a I get the same ether address for both ethernet cards in the machine. I thought MAC address were unique? The cards are different, I have a  ce and  eri . Both show an ether of:

 ether 0:3:ba:45:b:d4

How would I get the MAC address for each card? Is there another way?
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Looks like you are right but I am a little confuse how it all works. For instance doesn't a DHCP request come from a unique MAC address in a subnet. If the MAC address isn't unique how would the DHCP know which ethernet card to hand the IP to? In my case I use static IP's so I can't tell how it would impact.

Come to think of it, is this one MAC for all Ethernet cards the reason I always see:


traceroute: Warning: Multiple interfaces found; using xx.xx.xx.xx @beg1

message when I do a traceroute on a box with two Ethernet cards?
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@jjc_mn:

I'm not sure why Sun does this, but it can cause trouble for a few network related things such as DHCP.

E.g. if you connect several unbonded interfaces to the same switch in the same VLAN/subnet. This can confuse the switch and reduce it's efficiency. Probably same thing for your traceroute.

So as a general rule, if you use multiple interfaces on a Sun, change the setting to unique MAC addresses.



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