06-03-2013 07:25 AM - edited 03-07-2019 01:41 PM
We currently have Cisco WS-X6708-10GE blade installed in our Cisco 7606-S switch. Each of the ports have a X2-10GB-SR tranciever. When I look at the port with the "sh int tengig xx" command I see the following:
!
TenGigabitEthernet 4/1 is up, line protocol is up (connected)
Hardware is c7600 10Gb 802.3, address is 001c.b0ca.75c0
!
TenGigabitEthernet 4/2 is up, line protocol is up (connected)
Hardware is c7600 10Gb 802.3, address is 001c..b0ca.75c0
!
TenGigabitEthernet 4/3 is up, line protocol is up (connected)
Hardware is c7600 10Gb 802.3, address is 001a.6c9e.e1fa
!
TenGigabitEthernet 4/4 is up, line protocol is up (connected)
Hardware is c7600 10Gb 802.3, address is 001a.5c9e.e1fb
!
TenGigabitEthernet 4/5 is up, line protocol is up (connected)
Hardware is c7600 10Gb 802.3, address is 001a.5c9e.e1fc
!
TenGigabitEthernet 4/5 is up, line protocol is up (connected)
Hardware is c7600 10Gb 802.3, address is 001a.5c9e.e1fd
!
TenGigabitEthernet 4/6 is up, line protocol is up (connected)
Hardware is c7600 10Gb 802.3, address is 001c.b0ca.75c0
!
TenGigabitEthernet 4/6 is up, line protocol is up (connected)
Hardware is c7600 10Gb 802.3, address is 001c.b0ca.75c0
!
Why does do the following ports show the same hardware address - 001c.b0ca.75c0?
TenGigabitEthernet 4/1
TenGigabitEthernet 4/2
TenGigabitEthernet 4/6
TenGigabitEthernet 4/7
Can this be changed?
06-03-2013 05:13 PM
You can't change the MAC address as they are burnt-in-address (BIA). It's the standard.
06-04-2013 07:17 AM
ok, but why do several of the ports have the same MAC?
06-04-2013 11:22 PM
Ports with the same MAC addresses, are they in an etherchannel?
06-05-2013 05:54 AM
No. The ports do have sub-interfaces.
!
!
interface TenGigabitEthernet4/7
description ATT 1
bandwidth 10000000
no ip address
!
interface TenGigabitEthernet4/7.2009
description "ATT ASE - Cart - Pri"
encapsulation dot1Q 2009
ip address 10.0.17.25 255.255.255.248
!
interface TenGigabitEthernet4/8
description ATT 2
bandwidth 10000000
no ip address
!
interface TenGigabitEthernet4/8.2010
description "ATT ASE - Cart - Bkup"
encapsulation dot1Q 2010
ip address 10.0.18.25 255.255.255.248
delay 10
!
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