Nortel Networks 8000 - Manual (Page 69)

4 POS and CPOS interface configuration
Nortel Secure Router 8000 Series
Configuration -WAN Access
Interface
Card Link Layer Protocol MP Binding
RTP1CPE1 PPP and HDLC Supports each MP binding supports a maximum of
12 channels, and the maximum number of bindings
is 32.
RTP1CPT1 PPP and HDLC Supports each MP binding supports a maximum of
12 channels, and the maximum number of bindings
is 32.
Table 4-2 shows the working mode of the E1/T1 channels channelized by the CPOS interface
cards on the SR8000.
Table 4-2 Working mode of the E1/T1 channels supported by the SR8000
Channel Non-frame Format Frame Format
Unchannelized Mode Channelized Mode
E1 Serial interface whose
rate is 2.048Mbit/s
Not supports. Except timeslot 0, the 31
timeslots can be bound as
the serial interface of
Nx64Kbit/s.
T1 Serial interface whose
rate is 1.544Mbit/s
Not supports. The 24 timeslots can be
bound as the serial
interface of Nx64Kbit/s or
Mx56Kbit/s.
Characteristics of STM-1 CPOS interface
The physical port of the STM-1 CPOS interface is not a service port but a controller.
E1/T1/channels are synchronous serial interfaces that you configure in the serial interface
view. The indexing method of the interface number is four-dimension index: slot number/card
number/port number/channel number.
The STM-1 CPOS interface has the following characteristics:
• Support for MPLS
The STM-1 CPOS interface of the SR8000 supports MPLS packet forwarding between
different channels as well as between channels and other service boards. For packets marked
with MPLS, the uplink supports label pop-up operation; the downlink supports label
exchanging and label adding and supports mapping between LSP token and channel number.
• Support for QoS
The STM-1 CPOS interface supports to configure traffic classification policy on each channel
and MP group, supports to limit the output bandwidth of each channel and MP group by
configuring traffic queues, supports to perform outgoing traffic queue scheduling
configuration on each channel and MP group, and supports the destination port to redirect the
packets of the channel and MP group.
4-8 Nortel Networks Inc. Issue 5.3 (30 March 2009)