Juniper ACX1000 Configuration Manual page 244

ACX Series Universal Access Router Configuration Guide
186
F4 alarm indication signal (AIS) (end-to-end)
F4 remote defect indication (RDI) (end-to-end)
F4 loopback (end-to-end)
F5 loopback
F5 AIS
F5 RDI
ATM OAM is supported on ACX1000, ACX2000, and ACX2200 routers, and on Channelized
E1/T1 Circuit Emulation MICs on ACX4000 routers.
The following methods of processing OAM cells that traverse through pseudowires with
circuit cross-connect (CCC) encapsulation are supported:
Virtual path (VP) pseudowires (CCC encapsulation)—In the case of ATM VP
pseudowires (all virtual circuits in a VP are transported over a single N-to-one mode
pseudowire), all F4 and F5 OAM cells are forwarded through the pseudowire.
Port pseudowires (CCC encapsulation)—Similar to VP pseudowires, with port
pseudowires, all F4 and F5 OAM cells are forwarded through the pseudowire.
Virtual circuit (VC) pseudowires (CCC encapsulation)—In the case of VC pseudowires,
F5 OAM cells are forwarded through the pseudowire, while F4 OAM cells are terminated
at the Routing Engine.
For ATM pseudowires, the F4 flow cell is used to manage the VP level. On ACX Series
routers with ATM pseudowires (CCC encapsulation), you can configure OAM F4 cell
flows to identify and report virtual path connection (VPC) defects and failures. Junos OS
supports three types of OAM F4 cells in end-to-end F4 flows:
Virtual path AIS
Virtual path RDI
Virtual path loopback
For OAM F4 and F5 cells, IP termination is not supported. Also, Junos OS does not support
segment F4 flows, VPC continuity check, or VP performance management functions.
The maximum number of ATM VCs that you can configure on ACX Series routers is 1000.
ACX Series routers do not support the transmission and reception of OAM F5 loopback
cells. Therefore, for ATM1 and ATM2 IQ interfaces with an ATM encapsulation, you cannot
configure the OAM F5 loopback cell period on virtual circuits on ACX Series routers.
For OAM F4 cells, on each VP, you can configure an interval during which to transmit
loopback cells by including the
atm-options vpi vpi-identifier]
include the statement at the
oam-liveness
vpi vpi-identifier] hierarchy level.
For interfaces that are configured for ATM cell-relay promiscuous virtual path identifier
(VPI) mode, the show interfaces command output does not display the OAM F4 cell
oam-period statement at the
hierarchy level. To modify OAM liveness values on a VP,
[edit interfaces interface-name atm-options
Copyright © 2017, Juniper Networks, Inc.
[edit interfaces interface-name