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Chapter 9
Ethernet Operation
Whenever you drop two STS-3c multicard EtherSwitch circuits onto an Ethernet card and delete only
Caution
the first circuit, you should not provision STS-1 circuits to the card without first deleting the
remaining STS-3c circuit. If you attempt to create a STS-1 circuit after deleting the first STS-3c
circuit, the STS-1 circuit will not work and no alarms will indicate this condition. To avoid this
condition, delete the second STS-3c prior to creating the STS-1 circuit.
9.2.2 Single-Card EtherSwitch
Single-card EtherSwitch allows each Ethernet card to remain a single switching entity within the ONS
15454 shelf. This option allows a full STS-12c worth of bandwidth between two Ethernet circuit points.
Figure 9-4
Figure 9-4
Router
Router
Seven scenarios exist for provisioning single-card EtherSwitch bandwidth:
1.
2.
3.
4.
5.
6.
7.
Note
When configuring scenario 3, the STS 6c must be provisioned before either of the STS 3c circuits.
9.2.3 ONS 15454 and ONS 15327 EtherSwitch Circuit Combinations
The following table shows the Ethernet circuit combinations available in ONS 15454s and ONS 15327s
November 2001
illustrates a single-card EtherSwitch configuration.
A Single-card EtherSwitch configuration
Ethernet card #1
ONS Node
Ethernet card #3
STS 12c
STS 6c + STS 6c
STS 6c + STS 3c + STS 3c
STS 6c + 6 STS-1s
STS 3c + STS 3c +STS 3c +STS 3c
STS 3c +STS 3c + 6 STS-1s
12 STS-1s
Ethernet card #2
VLAN A
ONS Node
VLAN B
Ethernet card #4
Cisco ONS 15454 Installation and Operations Guide
Multicard and Single-Card EtherSwitch
Router
Router
9-5
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