Specifying The Interface Address On A Spa; Modifying The Mac Address On An Interface; Verifying A Mac Address - Cisco ASR 1000 Configuration Manual

Configuration Tasks

Specifying the Interface Address on a SPA

SPA interface ports begin numbering with "0" from left to right. Single-port SPAs use only the port
number 0. To configure or monitor SPA interfaces, you need to specify the physical location of the SIP,
SPA, and interface in the CLI. The interface address format is slot/subslot/port, where:
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The following example shows how to specify the first interface (0) on a SPA installed in the first subslot
of a SIP (0) installed in chassis slot 0:
Router(config)# interface GigabitEthernet 0/0/0
interface GigabitEthernet0/0/0
no ip address
shutdown
negotiation auto
no cdp enable

Modifying the MAC Address on an Interface

The Gigabit Ethernet SPAs use a default MAC address for each port that is derived from the base address
that is stored in the electrically erasable programmable read-only memory (EEPROM) on the backplane
of the Cisco ASR 1000 Series Routers.
To modify the default MAC address of an interface to some user-defined address, use the following
command in interface configuration mode:
Command
Router(config-if)# mac-address
ieee-address
To return to the default MAC address on the interface, use the no form of the command.

Verifying a MAC Address

To verify the MAC address of an interface, use the show interfaces gigabitethernet privileged EXEC
command and observe the value shown in the "address is" field.
The following example shows that the MAC address is 000a.f330.2e40 for interface 1 on the SPA
installed in subslot 0 of the SIP installed in slot 2 of the Cisco ASR 1000 Series Router:
Router# show interfaces gigabitethernet 2/0/1
GigabitEthernet2/0/1 is up, line protocol is up
Hardware is SPA-1X10GE-L-V2, address is 000a.f330.2e40 (bia 000a.f330.2e40)
Internet address is 2.2.2.1/24
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide
10-4
slot—Specifies the chassis slot number in the Cisco ASR 1000 Series Aggregation Services Routers
where the SIP is installed.
subslot—Specifies the slot of the SIP where the SPA is installed.
port—Specifies the number of the individual interface port on a SPA.
Chapter 10
Purpose
Modifies the default MAC address of an interface to
some user-defined address, where:
ieee-address—Specifies the 48-bit Institute of
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Electrical and Electronics Engineers (IEEE) MAC
address written as a dotted triple of four-digit
hexadecimal numbers (xxxx.yyyy.zzzz).
Configuring the Ethernet SPAs
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