Cisco ONS 15454 SDH Specifications Page 358

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9-12
Cisco ONS 15454 SDH Installation and Operations Guide, R3.3
May 2002
Chapter 9 Ethernet Operation
E Series Cards
Note Both 1000 Full and Auto mode set the E1000-2-G port to the 1000 Mbps and Full duplex operating
mode; however, flow control is disabled when 1000 Full is selected. Choosing Auto mode enables the
E1000-2-G card to auto-negotiate flow control. Flow control is a mechanism that prevents network
congestion by ensuring that transmitting devices do not overwhelm receiving devices with data. The
E1000-2-G port handshakes with the connected network device to determine if that device supports flow
control.
Step 4 Click the Enabled checkbox(s) to activate the corresponding Ethernet port(s).
Step 5 Click Apply.
Your Ethernet ports are now provisioned and ready to be configured for VLAN membership.
Step 6 Repeat this procedure for all other cards that will be in the VLAN.
9.2.5 E-Series Gigabit Interface Converters
Gigabit interface converters (GBICs) are hot-swappable input/output devices that plug into a Gigabit
Ethernet card to link the port with the fiber-optic network. The type of GBIC determines the maximum
distance that the Ethernet traffic will travel from the card to the next network device.
The E1000-2-G card supports SX and LX GBICs.
1000BaseSX operates on multi-mode fiber optic link spans of up to 550 m in length. 1000BaseLX
operates on single-mode fiber optic links of up to 10 km in length.
Table 9-4 shows the available GBICs.
For GBIC installation and cabling instructions, see the Install Gigabit Interface Converters section on
page 1-35.
Caution Use only GBICs certified for use in the ONS 15454 SDH E1000-2-G card, Cisco product numbers
15454-GBIC-SX and 15454-GBIC-LX.
Caution E1000-2-G cards lose traffic for approximately 30 seconds when an ONS 15454 SDH database is
restored. Traffic is lost during the period of spanning tree reconvergence. The CARLOSS alarm will
appear and clear during this period.
Table 9-4 Available GBICs
GBIC Span Length Product Number
Short wavelength (1000BaseSX) 550m 15454-GBIC-SX
Long wavelength/long haul (1000BaseLX) 5km 15454-GBIC-LX
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