9-4
Cisco ONS 15454 Installation and Operations Guide
November 2001
Chapter9 Ethernet Operation
Multicard and Single-Card EtherSwitch
Step 3 From the Port screen, choose the appropriate mode for each Ethernet port. Valid choices for the
E100T-12/E100T-G card are Auto, 10 Half, 10 Full, 100 Half, or 100 Full. Valid choices for the
E1000-2/E1000-2-G card are 1000 Full or Auto.
Both 1000 Full and Auto mode set the E1000-2 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
card to autonegotiate 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 port
handshakes with the connected network device to determine if t h at dev ice suppo rt s fl ow c on trol .
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 mem be rship.
Step 6 Repeat this procedure for all other cards that will be in the VLAN.
9.2 Multicard and Single-Card EtherSwitch
The ONS 15454 enables multicard and single-card EtherSwitch modes. At the Ethernet card view in
CTC, click the Provisioning > Card tabs to reveal the Card Mode option.

9.2.1 Multicard EtherSwitch

Multicard EtherSwitch provisions two or more Ethernet cards to act as a single layer 2 switch. It supports
one STS-6c shared packet ring, two STS-3c shared packet rings, or six STS-1 shared packet rings. The
bandwidth of the single switch formed by the Ethernet cards matches the bandwidth of the provisioned
Ethernet circuit up to STS-6c worth of bandwidth.
Figure9-3 A Multicard EtherSwitch configuration
ONS NodeONS Node
ONS Node
ONS Node
Router
Ethernet card #3
Router
Router
Router
Ethernet card #1
Ethernet card #4
Ethernet card #2
Shared packet ring
VLAN A
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