How to assign unique MAC addresses to sub-interfaces












0














I'm in a corporate environment with a DHCP server with static assignments for my server. I have one physical nic with several sub-interfaces. I statically assign different MAC addresses for each sub-interface to get another IP address from the DHCP server. For some reason, my server is not taking the static MAC addresses. You'll notice that ifconfig shows each interface with the same MAC.



How do I assign unique MAC addresses to my sub-interfaces?



$ cat interfaces



auto lo 
iface lo inet loopback

auto eth0:1
iface eth0:1 inet dhcp
hwaddress ether 00:0c:29:31:24:fa
hostname gwrt-test
client gwrt-test

auto eth0:2
iface eth0:2 inet dhcp
hwaddress ether 00:0c:29:31:25:fa
hostname gwrt-test2
client gwrt-test2

$ ifconfig

eth0 Link encap:Ethernet HWaddr 00:0c:29:31:25:fa
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:329737 errors:0 dropped:0 overruns:0 frame:0
TX packets:121645 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:69228791 (69.2 MB) TX bytes:63531749 (63.5 MB)
Interrupt:16

eth0:1 Link encap:Ethernet HWaddr 00:0c:29:31:25:fa <- should be 24:fa
inet addr:10.203.102.29 Bcast:10.203.102.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:16

eth0:2 Link encap:Ethernet HWaddr 00:0c:29:31:25:fa
inet addr:10.203.102.32 Bcast:10.203.102.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:16









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  • If you're thinking of going to the trouble of setting the MAC address explicitly for each interface, and as you say the addresses handed out by the dhcp server are static and reserved for use by your server, why not just configure them statically instead of using dhcp?
    – roadmr
    Nov 4 '13 at 18:29










  • Company politics. The server is for development and sitting on my desk... but yes, static would be ideal.
    – Jason Tooke
    Nov 4 '13 at 19:35
















0














I'm in a corporate environment with a DHCP server with static assignments for my server. I have one physical nic with several sub-interfaces. I statically assign different MAC addresses for each sub-interface to get another IP address from the DHCP server. For some reason, my server is not taking the static MAC addresses. You'll notice that ifconfig shows each interface with the same MAC.



How do I assign unique MAC addresses to my sub-interfaces?



$ cat interfaces



auto lo 
iface lo inet loopback

auto eth0:1
iface eth0:1 inet dhcp
hwaddress ether 00:0c:29:31:24:fa
hostname gwrt-test
client gwrt-test

auto eth0:2
iface eth0:2 inet dhcp
hwaddress ether 00:0c:29:31:25:fa
hostname gwrt-test2
client gwrt-test2

$ ifconfig

eth0 Link encap:Ethernet HWaddr 00:0c:29:31:25:fa
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:329737 errors:0 dropped:0 overruns:0 frame:0
TX packets:121645 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:69228791 (69.2 MB) TX bytes:63531749 (63.5 MB)
Interrupt:16

eth0:1 Link encap:Ethernet HWaddr 00:0c:29:31:25:fa <- should be 24:fa
inet addr:10.203.102.29 Bcast:10.203.102.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:16

eth0:2 Link encap:Ethernet HWaddr 00:0c:29:31:25:fa
inet addr:10.203.102.32 Bcast:10.203.102.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:16









share|improve this question
























  • If you're thinking of going to the trouble of setting the MAC address explicitly for each interface, and as you say the addresses handed out by the dhcp server are static and reserved for use by your server, why not just configure them statically instead of using dhcp?
    – roadmr
    Nov 4 '13 at 18:29










  • Company politics. The server is for development and sitting on my desk... but yes, static would be ideal.
    – Jason Tooke
    Nov 4 '13 at 19:35














0












0








0







I'm in a corporate environment with a DHCP server with static assignments for my server. I have one physical nic with several sub-interfaces. I statically assign different MAC addresses for each sub-interface to get another IP address from the DHCP server. For some reason, my server is not taking the static MAC addresses. You'll notice that ifconfig shows each interface with the same MAC.



How do I assign unique MAC addresses to my sub-interfaces?



$ cat interfaces



auto lo 
iface lo inet loopback

auto eth0:1
iface eth0:1 inet dhcp
hwaddress ether 00:0c:29:31:24:fa
hostname gwrt-test
client gwrt-test

auto eth0:2
iface eth0:2 inet dhcp
hwaddress ether 00:0c:29:31:25:fa
hostname gwrt-test2
client gwrt-test2

$ ifconfig

eth0 Link encap:Ethernet HWaddr 00:0c:29:31:25:fa
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:329737 errors:0 dropped:0 overruns:0 frame:0
TX packets:121645 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:69228791 (69.2 MB) TX bytes:63531749 (63.5 MB)
Interrupt:16

eth0:1 Link encap:Ethernet HWaddr 00:0c:29:31:25:fa <- should be 24:fa
inet addr:10.203.102.29 Bcast:10.203.102.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:16

eth0:2 Link encap:Ethernet HWaddr 00:0c:29:31:25:fa
inet addr:10.203.102.32 Bcast:10.203.102.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:16









share|improve this question















I'm in a corporate environment with a DHCP server with static assignments for my server. I have one physical nic with several sub-interfaces. I statically assign different MAC addresses for each sub-interface to get another IP address from the DHCP server. For some reason, my server is not taking the static MAC addresses. You'll notice that ifconfig shows each interface with the same MAC.



How do I assign unique MAC addresses to my sub-interfaces?



$ cat interfaces



auto lo 
iface lo inet loopback

auto eth0:1
iface eth0:1 inet dhcp
hwaddress ether 00:0c:29:31:24:fa
hostname gwrt-test
client gwrt-test

auto eth0:2
iface eth0:2 inet dhcp
hwaddress ether 00:0c:29:31:25:fa
hostname gwrt-test2
client gwrt-test2

$ ifconfig

eth0 Link encap:Ethernet HWaddr 00:0c:29:31:25:fa
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:329737 errors:0 dropped:0 overruns:0 frame:0
TX packets:121645 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:69228791 (69.2 MB) TX bytes:63531749 (63.5 MB)
Interrupt:16

eth0:1 Link encap:Ethernet HWaddr 00:0c:29:31:25:fa <- should be 24:fa
inet addr:10.203.102.29 Bcast:10.203.102.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:16

eth0:2 Link encap:Ethernet HWaddr 00:0c:29:31:25:fa
inet addr:10.203.102.32 Bcast:10.203.102.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:16






networking server ethernet dhcp






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edited Nov 4 '13 at 18:20









Web-E

17.6k104489




17.6k104489










asked Nov 4 '13 at 18:17









Jason Tooke

112




112












  • If you're thinking of going to the trouble of setting the MAC address explicitly for each interface, and as you say the addresses handed out by the dhcp server are static and reserved for use by your server, why not just configure them statically instead of using dhcp?
    – roadmr
    Nov 4 '13 at 18:29










  • Company politics. The server is for development and sitting on my desk... but yes, static would be ideal.
    – Jason Tooke
    Nov 4 '13 at 19:35


















  • If you're thinking of going to the trouble of setting the MAC address explicitly for each interface, and as you say the addresses handed out by the dhcp server are static and reserved for use by your server, why not just configure them statically instead of using dhcp?
    – roadmr
    Nov 4 '13 at 18:29










  • Company politics. The server is for development and sitting on my desk... but yes, static would be ideal.
    – Jason Tooke
    Nov 4 '13 at 19:35
















If you're thinking of going to the trouble of setting the MAC address explicitly for each interface, and as you say the addresses handed out by the dhcp server are static and reserved for use by your server, why not just configure them statically instead of using dhcp?
– roadmr
Nov 4 '13 at 18:29




If you're thinking of going to the trouble of setting the MAC address explicitly for each interface, and as you say the addresses handed out by the dhcp server are static and reserved for use by your server, why not just configure them statically instead of using dhcp?
– roadmr
Nov 4 '13 at 18:29












Company politics. The server is for development and sitting on my desk... but yes, static would be ideal.
– Jason Tooke
Nov 4 '13 at 19:35




Company politics. The server is for development and sitting on my desk... but yes, static would be ideal.
– Jason Tooke
Nov 4 '13 at 19:35










3 Answers
3






active

oldest

votes


















0














You can install macchanger Install macchanger



Then execute like following,



sudo macchanger --mac 00:11:22:33:44:55 <interface_name>



More details






share|improve this answer





























    0














    Multimac can do this. (http://www.primianotucci.com/os/multimac)
    Alternatively you can use "ip link" to add veth interfaces.



    In both methods you must then bridge veth0 to eth0 using brctl (bridge-utils).



    Each interface (tapX for multimac or vethX for veth) can then have custom mac addresses
    (ifconfig hw ether xx:xx:xx:xx:xx:xx, interface should be down.)






    share|improve this answer





























      0














      You can use following commands on linux machines.



                ifconfig eth1.2 down 
      ifconfig eth1.2 hw ether 00:00:00:02:03:04
      ifconfig eth1.2 up





      share|improve this answer





















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        3 Answers
        3






        active

        oldest

        votes








        3 Answers
        3






        active

        oldest

        votes









        active

        oldest

        votes






        active

        oldest

        votes









        0














        You can install macchanger Install macchanger



        Then execute like following,



        sudo macchanger --mac 00:11:22:33:44:55 <interface_name>



        More details






        share|improve this answer


























          0














          You can install macchanger Install macchanger



          Then execute like following,



          sudo macchanger --mac 00:11:22:33:44:55 <interface_name>



          More details






          share|improve this answer
























            0












            0








            0






            You can install macchanger Install macchanger



            Then execute like following,



            sudo macchanger --mac 00:11:22:33:44:55 <interface_name>



            More details






            share|improve this answer












            You can install macchanger Install macchanger



            Then execute like following,



            sudo macchanger --mac 00:11:22:33:44:55 <interface_name>



            More details







            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered Nov 4 '13 at 18:23









            Web-E

            17.6k104489




            17.6k104489

























                0














                Multimac can do this. (http://www.primianotucci.com/os/multimac)
                Alternatively you can use "ip link" to add veth interfaces.



                In both methods you must then bridge veth0 to eth0 using brctl (bridge-utils).



                Each interface (tapX for multimac or vethX for veth) can then have custom mac addresses
                (ifconfig hw ether xx:xx:xx:xx:xx:xx, interface should be down.)






                share|improve this answer


























                  0














                  Multimac can do this. (http://www.primianotucci.com/os/multimac)
                  Alternatively you can use "ip link" to add veth interfaces.



                  In both methods you must then bridge veth0 to eth0 using brctl (bridge-utils).



                  Each interface (tapX for multimac or vethX for veth) can then have custom mac addresses
                  (ifconfig hw ether xx:xx:xx:xx:xx:xx, interface should be down.)






                  share|improve this answer
























                    0












                    0








                    0






                    Multimac can do this. (http://www.primianotucci.com/os/multimac)
                    Alternatively you can use "ip link" to add veth interfaces.



                    In both methods you must then bridge veth0 to eth0 using brctl (bridge-utils).



                    Each interface (tapX for multimac or vethX for veth) can then have custom mac addresses
                    (ifconfig hw ether xx:xx:xx:xx:xx:xx, interface should be down.)






                    share|improve this answer












                    Multimac can do this. (http://www.primianotucci.com/os/multimac)
                    Alternatively you can use "ip link" to add veth interfaces.



                    In both methods you must then bridge veth0 to eth0 using brctl (bridge-utils).



                    Each interface (tapX for multimac or vethX for veth) can then have custom mac addresses
                    (ifconfig hw ether xx:xx:xx:xx:xx:xx, interface should be down.)







                    share|improve this answer












                    share|improve this answer



                    share|improve this answer










                    answered May 6 '14 at 16:24









                    olivervbk

                    1112




                    1112























                        0














                        You can use following commands on linux machines.



                                  ifconfig eth1.2 down 
                        ifconfig eth1.2 hw ether 00:00:00:02:03:04
                        ifconfig eth1.2 up





                        share|improve this answer


























                          0














                          You can use following commands on linux machines.



                                    ifconfig eth1.2 down 
                          ifconfig eth1.2 hw ether 00:00:00:02:03:04
                          ifconfig eth1.2 up





                          share|improve this answer
























                            0












                            0








                            0






                            You can use following commands on linux machines.



                                      ifconfig eth1.2 down 
                            ifconfig eth1.2 hw ether 00:00:00:02:03:04
                            ifconfig eth1.2 up





                            share|improve this answer












                            You can use following commands on linux machines.



                                      ifconfig eth1.2 down 
                            ifconfig eth1.2 hw ether 00:00:00:02:03:04
                            ifconfig eth1.2 up






                            share|improve this answer












                            share|improve this answer



                            share|improve this answer










                            answered Jun 1 at 7:54









                            Nagesh HS

                            63




                            63






























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