Specifications

Cisco ONS 15327 Product Overview
Spanning Tree Protocol
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Cisco ONS 15327 Product Overview, R3.3
June 2002
path exists between any two network hosts. The single path eliminates possible
bridge loops. You can enable spanning tree at the Ethernet-port level with a simple
CTC procedure.
Single-card and Multicard EtherSwitch
The ONS 15327 supports single-card and multicard EtherSwitch.
When you provision single-card EtherSwitch, each Ethernet card is a single
switching entity within the ONS 15327. This option allows STS-12c of bandwidth
between two Ethernet circuit points. Single-card EtherSwitch supports one
STS-12c, one STS-6c, two STS-3c or six STS-1 circuits. Figure 24 shows a
single-card EtherSwitch.
Figure 24 Single-card EtherSwitch
When you provision multicard EtherSwitch, two or more Ethernet cards act as a
single layer 2 switch. Multicard EtherSwitch supports one STS-3c circuit or three
STS-1 circuits. The bandwidth of the single switch formed by the Ethernet cards
matches the bandwidth of the provisioned Ethernet circuit up to STS-3c
bandwidth.Figure 25 shows a multicard EtherSwitch.
ONS NodeONS Node
Router
Ethernet card 3
Router
Router
Router
Ethernet card 1
Ethernet card 4
Ethernet card 2
VLAN B
VLAN A
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