Specifications
9-2
Cisco ONS 15454 Installation and Operations Guide, R3.2
March 2002
Chapter 9 Ethernet Operation
G1000-4 Card
• High Availability (including hitless (< 50 ms) performance under software upgrades and all types of
SONET/SDH equipment protection switches)
• hitless re-provisioning
• support of Gigabit Ethernet traffic at full line rate
• full TL1-based provisioning capability. Refer to the Cisco ONS 15454 TL1 Command Guide for
G1000-4 TL1 provisioning commands.
The G1000-4 card allows an Ethernet private line service to be provisioned and managed very much like
a traditional SONET or SDH line. G1000-4 card applications include providing carrier-grade
Transparent LAN Services (TLS), 100 Mbps Ethernet private line services (when combined with an
external 100 Mb Ethernet switch with Gigabit uplinks), and high availability transport for applications
such as storage over MAN/WANs.
You can map the four ports on the G1000-4 independently to any combination of STS-1, STS-3c,
STS-6c, STS-9c, STS-12c, STS-24c, and STS-48c circuit sizes, provided the sum of the circuit sizes that
terminate on a card do not exceed STS-48c.
To support a gigabit Ethernet port at full line rate, an STS circuit with a capacity greater or equal to
1Gbps (bidirectional 2 Gbps) is needed. An STS-24c is the minimum circuit size that can support a
gigabit Ethernet port at full line rate.The G1000-4 supports a maximum of two ports at full line rate.
Ethernet cards may be placed in any of the 12 multipurpose card slots. In most configurations, at least
two of the 12 slots need to be reserved for optical trunk cards, such as the OC-192 card. The reserved
OC-N slots give the ONS 15454 a practical maximum of ten G1000-4 cards. The G1000-4 card requires
the XC10G card to operate. The G1000-4 card is not compatible with XC or XCVT cards. For more
information about the G1000-4 card specifications, see the Card Reference chapter in the Cisco ONS
15454 Troubleshooting and Maintenance Guide.
The G1000-4 transmits and monitors the SONET J1 Path Trace byte in the same manner as ONS 15454
DS-N cards. For more information, see the “Creating a Path Trace” section on page 6-12.
Note G-Series encapsulation is standard HDLC framing over SONET/SDH as described in RFC 1622 and
RFC 2615 with the PPP protocol field set to the value specified in RFC 1841.
9.1.1 G1000-4 Application
Figure 9-1 shows an example of a G1000-4 application. In this example, data traffic from the Gigabit
Ethernet port of a high-end router travels across the ONS 15454 point-to-point circuit to the Gigabit
Ethernet port of another high-end router.
Figure 9-1 Data traffic using a G1000-4 point-to-point circuit
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STS-N/VC-N
SONET/SDH
Pause Frames
Gig-E
ONS Node ONS Node
Pause Frames
Gig-E