Oam Support - Avaya P550R User Manual

Chapter 1

OAM Support

1-8
Avaya P550R/P580/P880/P882 Multiservice Switch ATM Uplink Module User Guide, Version 2.0
By statically assigning the LECs of the same ELAN on
different ATM Uplink modules to the same VLAN, per-VLAN
spanning tree provides failover. The forwarding port is the
port with the lowest port ID.
* Note:
• Hunt Groups are not supported.
• If you configure your network with Failover, you
must be using per-VLAN Spanning Tree. Failure to do
so will result in broadcast storms which will take
down your network.
PNNI/UNI
You can configure both PNNI and UNI. However, you cannot
configure both on the same module. PNNI and UNI must be
configured on different modules and you can configure
either on multiple modules.
More ATM Traffic
Each module can support up to 128 virtual switch ports,
therefore, you can direct more ATM traffic through your
Avaya P550/P580/P880/P882 switch.
* Note: For PNNI, you cannot load share between
different modules, but you can load share
between different ports on the same module.
* Note: In RFC1483 mode, you can load share between
two physical ports on the same ATM Uplink
module.
The ATM Uplink module supports F5 (Virtual Circuit)
Administration, and Maintenance (
once per second down the default PVC in an ATM Link. These cells
are used to check the integrity of a circuit (end-to-end). The device
at the other end of the circuit should loop back these cells. Should
an OAM cell not return, the ATM Uplink module detects a circuit
failure and will fail over to the configured FailOver Link.
OAM support is valid only on RFC1483 VSPs (not LAN Emulation
Clients (LECs)).
Operation
OAM) cells. These cells are sent