Cisco Cisco ONS 15454 SONET Multiservice Provisioning Platform (MSPP) Guía De Diseño
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When you place the E-Series card in port-mapped mode, you can realize the following benefits:
No Unicast packet loss due to Multicast or Broadcast traffic.
No Multicast limitations.
No Excessive Ethernet circuit downtime since, there is no STP or need for STP
reconvergence.
No limitation on the number of STP instances.
E-Series Circuit Configurations
Ethernet circuits can link ONS 15454 nodes through point-to-point, shared packet ring, or hub
and spoke configurations. Two nodes usually connect with a point-to-point configuration. More
than two nodes usually connect with a shared packet ring configuration or a hub and spoke
configuration. Ethernet manual cross-connects allow you to cross connect individual Ethernet
circuits to an STS channel on the ONS 15454 optical interface and also to bridge non-ONS
SONET network segments.
E-Series Point-to-Point Ethernet Circuits
The ONS 15454 can set up a point-to-point Ethernet circuit as Single-card EtherSwitch, Multi-
card EtherSwitch Group, or Port-mapped. Multi-card EtherSwitch Group mode limits bandwidth
to STS-6c of bandwidth between two Ethernet circuit points, but allows adding nodes and cards
and making a shared packet ring. Single-card EtherSwitch and port-mapped modes allows a
full STS-12c of bandwidth between two Ethernet circuit points. These circuit configurations are
illustrated in the following figures:
Figure 5-4: A Multi-card EtherSwitch Point-to-Point Circuit
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ONS 15454
#1
ONS 15454
#2
ONS 15454
#3
Workstation
Workstation
SONET
Ethernet
192.168.1.25
255.255.255.0
Slot 4/Port 1
VLAN Blue
192.168.1.50
255.255.255.0
Slot 15/Port 1
VLAN Blue
Workstation
Workstation
192.168.1.100
255.255.255.0
255.255.255.0
Slot 5/Port 1
VLAN Blue
192.168.1.75
255.255.255.0
Slot 17/Port 1
VLAN Blue
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