Cisco Cisco ONS 15454 SONET Multiservice Provisioning Platform (MSPP) Notas de publicación
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Release Notes for Cisco ONS 15454 Release 4.0.1
OL-4470-01
New Features and Functionality
The Linear Mapper is a software feature and does not require you to purchase additional hardware if you
have already deployed the E-Series cards. The Linear Mapper feature will become available to you in
the form of a “Port-mapped” mode after you activate Release 4.0 or higher on the ONS platform.
have already deployed the E-Series cards. The Linear Mapper feature will become available to you in
the form of a “Port-mapped” mode after you activate Release 4.0 or higher on the ONS platform.
The benefit of the Linear Mapper, which can also be referred to as Port-mapped mode, is that it allows
Ethernet traffic to be mapped directly onto the SONET/SDH circuit without passing through a layer 2
(L2) switching engine. Although the L2 switching capabilities of E-Series cards provide a much wider
range of functionality than a simple L1 Ethernet-to-SONET/SDH mapping scheme, there are several
characteristics unique to the E-Series card’s L2 switching engine that may present limitations in some
applications. Such limitations of the L2 switching engine on the E-Series card include:
Ethernet traffic to be mapped directly onto the SONET/SDH circuit without passing through a layer 2
(L2) switching engine. Although the L2 switching capabilities of E-Series cards provide a much wider
range of functionality than a simple L1 Ethernet-to-SONET/SDH mapping scheme, there are several
characteristics unique to the E-Series card’s L2 switching engine that may present limitations in some
applications. Such limitations of the L2 switching engine on the E-Series card include:
•
Broadcast and Multicast rate limitation: Unicast packet loss can occur when Broadcast or Multicast
traffic is present in the Ethernet circuit (for reference see Field Notice 13171).
traffic is present in the Ethernet circuit (for reference see Field Notice 13171).
•
Excessive Ethernet circuit down time when a protection switch, TCC switch, or XC switch occurs.
This is due to the fact that each circuit must wait for Spanning Tree Protocol (STP) reconvergence,
which can take several minutes.
This is due to the fact that each circuit must wait for Spanning Tree Protocol (STP) reconvergence,
which can take several minutes.
•
Each card is limited to eight Spanning Tree instances, limiting the number of VLANs that can be
provisioned from one card without implementing provisioning workarounds.
provisioned from one card without implementing provisioning workarounds.
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
Note
Whether port-mapped mode is beneficial to your network or not depends on the particular
application. Several applications may benefit more from the L2 features provided by Multi-card
EtherSwitch Group mode and/or Single-card EtherSwitch mode. Use the guidelines above in
combination with the user documentation to analyze your particular network and determine if
port-mapped mode will improve performance.
application. Several applications may benefit more from the L2 features provided by Multi-card
EtherSwitch Group mode and/or Single-card EtherSwitch mode. Use the guidelines above in
combination with the user documentation to analyze your particular network and determine if
port-mapped mode will improve performance.
Note
Cisco offers other Ethernet data cards for the ONS 15454 and ONS 15327. These include the L1
Ethernet-to-SONET/SDH G-Series card and the L2/L3 switching ML-Series card (ONS 15454 only).
When choosing a data solution, each card family should be considered to ensure that you have
achieved the most appropriate solution.
Ethernet-to-SONET/SDH G-Series card and the L2/L3 switching ML-Series card (ONS 15454 only).
When choosing a data solution, each card family should be considered to ensure that you have
achieved the most appropriate solution.
Graphical Display of Lockout
Release 4.0.x offers a new, detailed graphical display of lockout conditions on a span. Prior to Release
4.0.x, there is no clear indication when a span that is locked out has been manually switched. In previous
releases, these events are reported in the Conditions tab or as a non-reporting event in the alarm tab.
4.0.x, there is no clear indication when a span that is locked out has been manually switched. In previous
releases, these events are reported in the Conditions tab or as a non-reporting event in the alarm tab.
Graphical indications of a Lockout, Force, or Manual switch condition are displayed for the following
schemes:
schemes:
•
1 + 1 configuration
•
2 Fiber BLSR
•
4 Fiber BLSR