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Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 8 Transponder and Muxponder Cards
8.11.1 Key Features
GE_XP card uses ethernet statistical multiplexing to aggregate GE traffic over the 10GE interface. In
order to demultiplex the stream an additional VLAN tag is added for each client port. This results in
reduction in traffic due to 10 ports in full line rate for the 10GE MXP mode. Additional tag is added on
client port on the GE to 10GE direction and is removed on the reverse direction. This tag consists of four
byte.
For 20GE MXP mode, full traffic cannot be sustained with all 20 ports connected to the trunk.
8.11.1 Key Features
The GE_XP and 10GE_XP cards have the following high-level features:
• GE MXP, TXP, and Layer 2 switch capability over the ONS 15454 DWDM platform.
• Interoperable with TXP_MR_10E and TXP_MR_10E_C cards. Also interoperable with
Cisco Catalyst 6500 and Cisco 7600 series GE and 10GE interfaces.
• Compatible with the ONS 15454 ANSI high-density shelf assembly, the ETSI ONS 15454 shelf
assembly, and the ETSI ONS 15454 high-density shelf assembly. Compatible with TCC2 and
TCC2P cards.
• Ports: The GE_XP has twenty GE client ports and two 10GE trunk ports. The 10GE_XP has two
10GE client ports and two 10GE trunk ports. The client GE signals are mapped into an ITU-T G.709
OTU2 signal using standard ITU-T G.709 multiplexing.
• FEC and E-FEC: ITU-T G.709 framing with standard Reed-Soloman (RS) (255,237) FEC.
Performance monitoring and ITU-T G.709 Optical Data Unit (ODU) synchronous and asynchronous
mapping. E-FEC with ITU-T G.709 ODU and 2.7 Gbps with greater than 8 dB coding gain.
• Broadcast drop-and-continue capability for VOD and broadcast video applications.
• Layer 2 switch mode provides VLAN translation, QinQ, ingress CoS egress QoS, Fast Ethernet
protection switching, and other Layer 2 Ethernet services.
• IEEE 802.3 frame format supported for 10GE interfaces. The minimum frame size is 64 bytes. The
maximum frame size is user-provisionable.
• MAC learning capability in Layer 2 switch mode.
• Configurable service provider VLANs (SVLANs) and customer VLANs (CVLANs).
• In Layer 2 switch mode, ports can be provisioned as network-to-network interfaces (NNIs) or
user-network interfaces (UNIs) to facilitate service provider to customer traffic management.
Table 8-33 GE_XP and 10GE_XP Card Modes
Card Mode Card Description
Layer 2
Ethernet
switch
GE_XP
10GE_XP
Provides capability to switch between any client port traffic and any trunk
port. Supported Ethernet protocols and services include QoS (Quality of
Service), CoS (Class of Service), QinQ, MAC learning, service provider
VLANs (SVLANs), and other Ethernet switch services.
10GE TXP 10GE_XP Provides a point-to-point application in which each 10 Gigabit Ethernet
client port is mapped to a 10 Gigabit Ethernet trunk port.
10GE MXP
20GE MXP
GE_XP Provides the ability to multiplex any combination of the card’s twenty GE
client ports to one or both of its 10GE trunk ports. The card can be
provisioned as a single MXP with twenty GE client ports or as two MXPs
with ten GE client ports and one trunk port.
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