
•
port
—
Specifies the number of the individual interface port on a SPA.
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:
Purpose
Command
Modifies the default MAC address of an interface to
some user-defined address, where:
•
ieee-address
—
Specifies the 48-bit Institute of
Electrical and Electronics Engineers (IEEE)
MAC address written as a dotted triple of
four-digit hexadecimal numbers (
xxxx.yyyy.zzzz
).
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 Routers:
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,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not supported
Full-duplex, 1000Mb/s, link type is force-up, media type is SX
output flow-control is on, input flow-control is on
(Additional output removed for readability)
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS
XE Everest 16.5
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Configuring the Ethernet SPAs
Modifying the MAC Address on an Interface