System information

Configuring Interfaces and TCP/IP Features
5-3
Table 5-1 describes each BSR interface and corresponding module:
Table 5-1 BSR Interface and Module Descriptions
CLI Interface BSR Module Interface Description
ethernet Supervisory Resource
Module (SRM) located
in slot 7.
Ethernet interface 0 is a 10 Mbps
management interface that does not
support the negotiation feature and is
associated with its corresponding port on
the SRM I/O module.
Ethernet interface 1 and 2 are typically
used to support an external T1/E1 BITS
clock and are associated with their
corresponding ports on the SRM I/O
module.
10/100 Ethernet
Module
Provides 8 10/100 Mbps Ethernet ports.
cable DOCSIS 1:4 Resource
Module
CMTS that provides 1 downstream
channel and 4 upstream channels.
gigaether Gigabit Ethernet
Resource Module
Provides one 1000 Mbps optical Ethernet
interface.
pos OC3/OC12 POS
Module
Provides two high speed OC3/OC12
SONET interfaces.
loopback N/A Loopback interfaces are used to act as
inbound logical interfaces when physical
interfaces go down. Up to 16 loopback
interfaces can be configured on the BSR.
Refer to “Configuring a Loopback
Interface” on page 5-8 for more
information.
tunnel N/A A tunnel interface is a logical interface
used to make point-to-point links between
two devices. Refer to “Configuring
Tunnels on an Interface” on page 5-10 for
more information.
unnumbered
interface
N/A Used in point-to-point connections when
an IP address is not required. This
interface is only available on the POS
module. Refer to “Configuring an
Unnumbered Interface” on page 5-13 for
more information.