Table Of Contents

Pseudo Wire Emulation Edge to Edge (PWE3)

Technology Description

PWE3

Inventory and Information Model Objects (IMOs)

PTP Layer 2 MPLS Tunnel Interface

Network Topology

Service Alarms

Pseudo Wire Emulation Edge to Edge (PWE3)

---

This chapter describes the level of support that Cisco ANA provides for PWE3, as follows:

•Technology Description

•Inventory and Information Model Objects (IMOs)

•Network Topology

•Service Alarms

Technology Description

PWE3

Pseudo Wire Emulation Edge-to-Edge (PWE3) provides methods for carrying networking services (such as ATM, Ethernet, TDM and SONET/SDH) over a Packet Switched Network (PSN) as outlined in RFC 3985. It is a point-to-point connection between pairs of Provider Edge (PE) routers, which emulates services like Ethernet over an underlying core MPLS network through encapsulation into a common MPLS format, thus allowing carriers to converge their services with an MPLS network.

Inventory and Information Model Objects (IMOs)

This section describes the following IMO:

•PTP Layer 2 MPLS Tunnel Interface (IPTPLayer2MplsTunnel)

PTP Layer 2 MPLS Tunnel Interface

The Network/Data Link layer PTP Layer 2 MPLS Tunnel Interface object is bound by its Containing Termination Points attribute to a Data Link Layer Interface object. It is accessed primarily by Label Switching Entity.

Table 15-1 PTP Layer 2 MPLS Tunnel Interface (IPTPLayer2MplsTunnel)

Attribute Name	Attribute Description	Scheme	Polling Interval
Local and Remote Router Addresses	Local and remote router IP addresses	IP Core	Configuration
Local and Remote Virtual Connection Labels	Local and remote virtual connection labels	IP Core	Configuration
Tunnel Identification	Tunnel identification	IP Core	Configuration
Tunnel Status	Tunnel status (Unknown, Up, Down)	IP Core	Configuration
Local and Remote Tunnel Interface	Local and remote tunnel interface object identifier	IP Core	Configuration
IANA Type	IANA type of the sublayer	N/A	N/A
Containing Termination Points	Underlying termination points (connection or physical)	IP Core	N/A
Contained Connection Termination Points	Bound Connection Termination Points (Tunnel Container)	IP Core	N/A

Network Topology

Cisco ANA discovers PWE3 Network layer topology by searching for matches between the Local and Remote Router IP Addresses in any one-hop-away remote side's PTP Layer 2 MPLS Tunnel Interface. In particular, it compares the Local and Remote Router IP Addresses and Tunnel Identifications.

Service Alarms

The following alarm is supported for this technology:

•Layer 2 Tunnel Down/Layer 2 Tunnel Up

For detailed information about alarms and correlation, see the Cisco Active Network Abstraction 3.6.5 User Guide.