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Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2
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Chapter 2 Card Reference
CE-100T-8 Card
The SPE from each POS mapper (up to VC4) carrying encapsulated Ethernet frames are passed onto the
multiplexer/demultiplexer (mux/demux) next, where the VC4 frames from both POS mappers are
multiplexed to form an VC4-4 frame for transport over the SDH network by means of the Bridging
Transmission Convergence (BTC-48) application-specific integrated circuit (ASIC).
Note Although the VC4 frames are multiplexed into an VC4-4 frame, the frame carries at most an VC4-2c
payload, leaving half of the VC4-4 bandwidth free.
In the egress direction (SDH-to-Ethernet), the mux/demux extracts the first and second VC4 SPEs from
the VC4-4 frame it receives from the BTC-48 before sending them to the POS mappers. The VC4 SDH
SPE carrying GFP or PPP/HDLC encapsulated Ethernet frames are then extracted and buffered in the
external memory of the POS mappers. This memory is used for providing alignment and differential
delay compensation for the received low/high order virtual concatenated payloads. When alignment and
delay compensation are complete, the Ethernet frames are decapsulated with one of the framing
protocols (GFP or PPP/HDLC). Decapsulated Ethernet frames are then passed onto the packet processor
for QoS queuing and traffic scheduling. The network processor switches the frame to one of the
corresponding PHY channels and then onto the Ethernet port for transmission to the external clients.
With regard to QoS, the VLAN class-of-service (CoS) threshold (value 0 to 7, default 7) and the IP
type-of-service (ToS) threshold (value 0 to 255, default 255) on incoming Ethernet packets are both
available for priority queuing. These thresholds are provisionable through CTC, TL1, and Cisco
Transport Manager (CTM). CoS takes precedence over ToS unless the CoS threshold is set to the default
of 7. This threshold value does not prioritize any packets based on CoS, so ToS is used. The value
configured is a threshold and any value greater than that value is set as a priority. For example, if a CoS
of 5 is set as the threshold, only CoS values of 6 and 7 would be set to priority.
2.3.1 CE-100T-8 Card-Level Indicators
The CE-100T-8 card faceplate has two card-level LED indicators, described in Table 2 -4.
2.3.2 CE-100T-8 Port-Level Indicators
The CE-100T-8 card has two LEDs embedded into each of the eight Ethernet-port RJ-45 connectors. The
LEDs are described in Tabl e 2-5 .
Table 2-4 CE-100T-8 Card-Level Indicators
Card-Level LEDs Description
SF LED (Red) The red FAIL LED indicates that the card processor is not ready or that a
catastrophic software failure occurred on the CE-100T-8 card. As part of the
boot sequence, the FAIL LED blinks until the software deems the card
operational, then it turns off.
ACT LED (Green) The ACT LED provides the operational status of the CE-100T-8. When the
ACT LED is green, it indicates that the CE-100T-8 card is active and the
software is operational; otherwise, it is off.