ipv6 eui-64 address

EdTheLadEdTheLad ■■■■□□□□□□ Posts: 2,112Member ■■■■□□□□□□
How do i find my routers Mac address.
When i use the ipv6 address xicon_mad.gificon_mad.gificon_mad.gif::/64 eui-64 command the router generates the
eui-64 address from the routers mac address.I've been searching but i cant find where
the mac is specified.A basic question but its wrecking my head.
Networking, sometimes i love it, mostly i hate it.Its all about the $$$$

Comments

  • PCHoldmannPCHoldmann Posts: 450Member
    "Show interfaces" will show the MAC addresses on all ethernet interfaces. "sh ipv6 interface brief" shows the assigned EUI-64 addresses
    There's no place like ^$
    Visit me at Route, Switch, Blog
  • WebmasterWebmaster Admin Posts: 10,292Admin Admin
    I think he mean the base mac address of the router itself.

    What you need Ed, is a cookie.


    Run cookie in rommon, skip the first 4 characters, then the next 12 is the base mac address of the router itself burned into the mainboard at manufacturing.


    rommon 1 > cookie

    cookie:
    01 01 00 04 c1 29 9c 40 43 20 00 ff 00 91 00 20
    00 00 00 00 00 00 00 00 4a 41 44 04 51 30 4a 31
    31 02 03 00 00 00 00 00 00 ff ff ff 60 06 49 0b
    17 0d ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    rommon 2 >
  • EdTheLadEdTheLad ■■■■□□□□□□ Posts: 2,112Member ■■■■□□□□□□
    Thats great, thanks a million Johan!
    Networking, sometimes i love it, mostly i hate it.Its all about the $$$$
  • EdTheLadEdTheLad ■■■■□□□□□□ Posts: 2,112Member ■■■■□□□□□□
    PCHoldmann wrote:
    "Show interfaces" will show the MAC addresses on all interfaces ethernet interfaces. "sh ipv6 interface brief" shows the assigned EUI-64 addresses

    "show interfaces" i wish icon_lol.gif
    On my first read i was thinking the mac was taken from the actual interface, but i was wondering what happens with regard to the serial.After close inspection i realized the same interface-id is used for all interfaces which is created using the routers base mac address.
    Networking, sometimes i love it, mostly i hate it.Its all about the $$$$
  • WebmasterWebmaster Admin Posts: 10,292Admin Admin
    You're most welcome Ed :D
  • PCHoldmannPCHoldmann Posts: 450Member
    Ok, so I answered the wrong question... icon_redface.gif

    Depending on the platform, this info may also be available the the show cXXXX (i.e. show c3600 on a 3600), show diag (3800), show catalyst6000 (6500), etc. I have noticed inconsistant output on these (show c1700 doesn't have it), results may vary.
    There's no place like ^$
    Visit me at Route, Switch, Blog
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