Removing Circuits; Operations, Administration, And Management Of Atm Interfaces; End-To-End And Segment Endpoints; Fault Management - Juniper JUNOSE SOFTWARE 11.0.X - LINK LAYER CONFIGURATION GUIDE 4-1-2010 Configuration Manual

removes entries that cannot be successfully refreshed after three successive failed
InARP requests.

Removing Circuits

If a circuit is removed, it is also removed from the ARP table, but not from the static
map. If the circuit is reconfigured, a new ARP table entry is generated from the
existing map entry. If the circuit uses InARP, the ARP table entry is immediately
removed on removal of the circuit.
If a subinterface is removed, all associated circuits and their associated ARP table
entries are removed.

Operations, Administration, and Management of ATM Interfaces

ATM interfaces support the OAM standards of the ITU, per recommendation I.610.
OAM provides VC/VP integrity and fault and performance management. The E Series
router supports F4 and F5 ATM OAM fault management, loopback, and continuity
check (CC) cells. These cells perform fault detection and notification, loopback testing,
and link integrity.
ATM uses F4 and F5 cell flows as follows:
ATM interfaces always generate and validate CRC-10 checksums on OAM cells.
For information about configuring OAM on the router, see the following sections:

End-to-End and Segment Endpoints

An ATM connection consists of a group of points. This OAM implementation provides
management for the following points:

Fault Management

ATM uses two types of fault management cells to convey defect information to the
endpoints of a VP/VC:
F4 Used in VPs
F5 Used in VCs
"Configuring OAM" on page 33
"Configuring F5 OAM for Data PVCs" on page 51
Connection endpoint The end of a VC/VP connection where the ATM cells are
terminated
Segment endpoint The end of a connection segment
Alarm indication signal (AIS) cells, which are used to indicate a fault to the
downstream endpoint. AIS cells contain defect type and defect location fields,
Operations, Administration, and Management of ATM Interfaces
Chapter 1: Configuring ATM
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