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Cisco Prime Network 4.0 User Guide
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Chapter 12 Monitoring Carrier Ethernet Services
Viewing Resilient Ethernet Protocol Properties (REP)
The following topics describe how to view STP properties related to:
• VLAN domain views and overlays—See Viewing STP Information in VLAN Domain Views and
VLAN Overlays, page 12-66.
• VLAN service link properties—See Viewing STP Properties for VLAN Service Links, page 12-67.
Viewing Resilient Ethernet Protocol Properties (REP)
Cisco Resilient Ethernet Protocol (REP) technology is implemented on Cisco Carrier Ethernet switches
and intelligent service edge routers. REP is a segment protocol, and a REP segment is a chain of ports
connected to each other and configured with the same segment identifier. Each end of a segment
terminates on an edge switch. The port where the segment terminates is called the edge port.
Cisco Prime Network discovers and displays REP Segments (identified by a REP segment identifier that
is locally configured on the network element) along with Global REP configuration details.
You can also view the REP port roles (open, alternate, and failed) in the Cisco Prime Network Vision
map. The REP port role is displayed as a tool-tip between the REP enabled trunk ports in the Ethernet
links. Using the Cisco Prime Network Vision map, you can identify if the segment is open or closed.
The map displays the forwarding direction (REP port roles) along the Physical links within VLAN
overlays. It also displays the forwarding direction along the VLAN links among the switching elements
within the VLAN logical domain topology.
REP implementation supports the following faults:
• A REP Port Role change to Failed service event will be generated when a REP port role is change
from Alternate or Open to Failed.
• A REP Port Role change to OK clearing service event will be generated when a REP port role is
change from Failed to Alternate or Open.
Correlation to these service events to physical layer events (for example Link down or Port down) is also
performed.
You can view REP properties in logical inventory.
Step 1 In Prime Network Vision, double-click the device configured for REP.
Table 12-7 MSTP Properties in Logical Inventory
Field Description
MST Force Version Force version used: MST, PVSTP, RSTP, STP, or Unknown.
MST Cfg ID Rev Level Revision level used by the selected device and negotiated with other
devices.
MST Cfg ID Name MSTP instance name.
MST Max Instances Maximum number of MSTP instances.
MST Cfg ID Fmt Sel Configuration format used by this device and negotiated with other
devices.
MST External Root Cost External root cost of the MSTP instance.