IBM SC30-3681-08 Frame Relay Network Management, Management Status Reporting, Full Status Report

Using Frame Relay

Multicast can also be enabled or disabled for an individual SVC. Use the multicast

option on add switched-virtual-circuit.

Frame Relay Network Management

The supplier of the FR network backbone provides FR network management. It is

management's responsibility to provide FR end-stations (routers) with status and

con®guration information concerning PVCs available at the interface.

For PVCs, the FR protocol supports the ANSI T1.617 Annex D, ITU-T Q.933 Annex

A (also referred to as CCITT Q.933 Annex A), and the Interim Local Management

Interface (LMI) management entities. You can turn these entities on or off using the

enable and disable LMI con®guration commands. Speci®cally, FR LMI provides the

following information:

v Noti®cation of additional PVCs (orphans) and whether they are active or inactive,

or noti®cation of any PVC deletions.

v Noti®cation of the availability of a con®gured PVC. The availability of a PVC is

indirectly related to the successful participation of the PVC end-point in the

heartbeat polling process, which is detailed in ªLink Integrity Veri®cation Reportº

on page 396.

v Veri®cation of the integrity of the physical link between the end-station and

network by using a keep alive sequence number interchange.

Although the FR interface supports PVC network management, it is not necessary

for management to run on the FR backbone for the interface to operate over the FR

backbone. For example, you may want to disable management for back-to-back

con®gurations.

For SVCs, the FR protocol supports FRF 4 (Frame Relay Forum Implementation

Agreement 4). This includes an implementation of ANSI Q.922 and a subset of

ANSI Q.933. Q.922 provides veri®cation of the integrity of the physical link between

the router and the network. Q.933 provides the means for establishing and

disconnecting SVCs across the network. Q.922 and Q.933 are always enabled

when SVCs are used.

Management Status Reporting

Upon request, FR LMI provides two types of status reports, a full status report and

a link integrity veri®cation report. A full status report provides information about all

PVCs the interface knows about. A link integrity veri®cation report veri®es the

connection between a speci®c end station and a network switch. All status inquiries

and responses are sent over DLCI 0 for ANSI T1.617 Annex D and ITU-T Q.933

Annex A, or DLCI 1023 for interim LMI management.

Full Status Report

When the FR interface requires a full status report, the router's FR protocol sends a

status enquiry message to the FR network backbone requesting a full status report.

A status enquiry message is a request for the status of all PVCs on the interface.

Upon receiving this request, FR management must respond with a full status report

consisting of the link integrity veri®cation element and a PVC status information

element for each PVC. (See ªLink Integrity Veri®cation Reportº on page 396.)

Chapter 30. Using Frame Relay Interfaces 395