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Cisco Active Network Abstraction 3.6.6 MPLS User Guide
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Chapter 9 Using Cisco ANA PathTracer in MPLS Networks
Using Cisco ANA PathTracer for MPLS TE Tunnels
To view Layer 2 path information, choose the Layer 2 tab and choose Show All from the View menu.
The path information is displayed in the active tab.
Note Selecting a device or link on the map automatically highlights the related parameters in the table.
Layer 2 properties that may be displayed in the Layer 2 tab relating specifically to VPNs include:
• Outer Label—The details of the outer MPLS label.
• Inner Label—The details of the inner MPLS label.
• MAC Address—The MAC address.
• Tunnel ID—The tunnel identifier. The identifier and the router IP addresses of the two tunnel edges
identify the pseudowire tunnel.
• Tunnel Type—The tunnel type, 0=Unknown, 1= PWE3, and 2=TE.
• Tunnel Status—The operational state of the tunnel, either up or down.
• Tunnel Local VC Label—The MPLS label that is used by this router to identify or access the tunnel.
It is inserted in the MPLS label stack by the local router.
• Tunnel Peer VC Label—The MPLS label that is used by this router to identify or access the tunnel.
It is inserted in the MPLS label stack by the peer router.
• Tunnel Local Router IP—The IP address of this tunnel edge, which is used as the MPLS router ID.
• Tunnel Peer Router IP—The IP address of the peer tunnel edge, which is used as the MPLS router
ID.
• Distribution Protocol Type—The protocol used by MPLS to build the tunnel, for example, LDP or
TDP.
• Peer Oid—The tunnel ID and device name.
Using Cisco ANA PathTracer for MPLS TE Tunnels
Cisco ANA Path Tracer uses label switching information to trace the end-to-end path of a TE tunnel path
from one PE router to another.
Using MPLS TE technology, Cisco ANA PathTracer enables you to:
• View a path or list of devices.
• View the following information for each network element:
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The relevant parameters for each interface on all layers along the path.
–
The path for the defined MPLS TE-LSP across the network.
The Cisco ANA PathTracer multipath window is displayed showing the MPLS TE tunnel topology map.
From this window, you can open the Cisco ANA PathTracer single-path window with the appropriate
MPLS TE tunnel information displayed in the Layer 2 tab.
Note Cisco ANA PathTracer does not display or trace EXP bits for L3 VPNs that use PBTS.