How to determine the mac address of an ATM interface

[ashley_dew]

Hi All,

I have a router with an SHDSL controller. I am doing some troubleshooting and there seems to be an ip address conflict on the layer  2 shdsl network.

I am trying to figure the mac address of my atm sub interface. An ip address is set on the controller.

interface ATM0/0/0.1 point-to-point

Does  someone know the command for finding it?

sh arp does not show the interface itself.

Can you please help.

[Jon Marshall]

Can you try -

"sh atm addresses"

Jon

[ashley_dew]

Invalid command

#sh atm ?
  arp-server          ATM ARP Server Table
  bundle              ATM bundle information
  class-links         ATM vc-class links
  ilmi-configuration  Display Top level ILMI
  ilmi-status         Display ATM Interface ILMI information
  interface           Interfaces and ATM information
  map                 ATM static mapping
  pvc                 ATM PVC information
  route               ATM route
  traffic             ATM statistics
  vc                  ATM VC information
  vp                  ATM VP information
 

The command is not available :(

[Jon Marshall]

ATM doesn't use mac addresses at L2 ie. it used VPI/VCI pairs.

However some Cisco devices do derive ATM addresses from mac addresses so I thought this may be the issue.

What if you do "sh atm interface <interface>"

Jon

[ashley_dew]

sh atm interface atm 0/0/0
Interface ATM0/0/0:
AAL enabled:  AAL5  , Maximum VCs: 23, Current VCCs: 3

VCIs per VPI: 256,
Max. Datagram Size: 4528
PLIM Type: GSHDSL - 512Kbps, Framing is Unknown,, TX clocking: LINE
2983405 input, 6491775 output, 96081793 IN fast, 112759109 OUT fast
 Avail bw = 512
Config. is ACTIVE

Unfortunately, no.

Is there a way I could force a mac address manually on the atm interface?

[Jon Marshall]

Don't know is the short answer.

What device are you using ?

Jon

[ashley_dew]

Can't find either.

It is a Cisco Router 2801 running 12.4.