For a 155 Mbits LAN port, 2 formats are supported:
sonet-sts-3c and sdh-stm-1. It can only be
modified if the port atm access is UNI or NNI.
For the other ports, the frame format cannot be
modified and is always returned as none.
The frame format can be changed only when the port
is disabled.
Sources for this description
MIBdepot
Parsed from atmmib21.mib.txt · ibm · ATM-SWITCHING-NODE-MIB
Source file: Download atmmib21.mib.txt
Source file: Download 65mibv412.mib.txt