Cisco GSR12/60 - 12012 Router -AnyLAN, SONET/SDH Installation And Configuration Manual page 176

Configuring the Cisco 12012
Use the following procedure to configure the interfaces installed in your Cisco 12012:
Step 1
Step 2
4-16 Cisco 12012 Gigabit Switch Router Installation and Configuration Guide
The IEEE 802.3u interface, located on the RP, allows connections to Ethernet
networks. In the following example, the system is being configured for the
Ethernet interface using IP. (Note that the Ethernet interface does not support
external routing functions.) Respond as appropriate for your needs, using your
own address and subnet mask for the setup prompts.
Configuring interface Ethernet0:
Is this interface in use?: yes
Configure IP on this interface?: yes
IP address for this interface: 3.3.1.1
Number of bits in subnet field: 8
Class A network is 3.0.0.0, 8 subnet bits; mask is 255.255.0.0
Configure CLNS on this interface?: yes
The Packet-Over-SONET (POS) interfaces allow connections to external
OC-3/STM-1 or OC-12/STM-4 networks. In the following example, the system
is being configured for a POS interface using IP. Respond as appropriate for your
needs, using your own address and subnet mask for the setup prompts. (Also
refer to Step 3, which shows this same interface being configured for IP
unnumbered; use whichever step is most appropriate for your needs.)
Configuring interface POS4/0:
Is this interface in use?: yes
Configure IP on this interface?: yes
Configure IP unnumbered on this interface?: no
IP address for this interface: 2.1.1.1
Number of bits in subnet field: 0
Class A network is 2.0.0.0, 0 subnet bits; mask is 255.0.0.0
Configure CLNS on this interface?: yes
For POS interfaces the cyclic redundancy check (CRC) default is 32-bits.
Note
For more complete POS interface configuration information, refer to the
configuration notes Quad OC-3c/STM-1c Packet-Over-SONET Line Card
Installation and Configuration (Document Number 78-4333-xx) and