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SYS-LINK (System Links)
Issue 1 June 2005 2175
SYS-LINK (System Links)
S8700 | 8710 / S8500
System links are packet links that originate at the Packet Interface board and traverse various
hardware components to specific endpoints. The hardware components involved on the forward
and reverse routes can be different, depending upon the configuration and switch
administration. Various types of links are defined by their endpoints:
Recording System Link Events
The system-links MO records every error encountered on the links. Most of these events are not
extraordinary unless they occur with an alarming frequency. The events are logged as they
occur, leaving a “trail” to help analyze abnormal behavior exhibited by the endpoints attached to
the links or the links themselves.
When a link goes down, an alarm is raised immediately. For EAL, INL, BFDL, and PACL link
types a MINOR alarm is raised. For every other link type a WRN alarm is raised. Other alarming
conditions that do not cause the link to go down get a WRN alarm, regardless of the link type.
MO Name Alarm Level Initial SAT Command to Run Full Name of MO
SYS-LINK MIN test sys-link location SYSTEM LINKS
SYS-LINK WRN test sys-link location SYSTEM LINKS
EAL Expansion Archangel Link terminating at an Expansion Interface board. This
link carries CCMS messages.
INL Indirect Neighbor Link terminating at a Switch Node Interface board.
PACL PNC ATM Control Link terminating at a PNC ATM-EI board. This link carries
ATM signaling commands from CAPro to the remote TN2238 (ATM-EI) boards.
PRI ISDN-PRI D-Channel Link terminating at a Universal DS1 board
RSCL Remote Socket Control Link terminating at a C-LAN board
RSL Remote Socket Link terminating at a C-LAN board
BFDL Bearer Fault Detection Link terminating at an Expansion Interface board. This
link provides inter-port-network bearer fault detection for port-networks that do
not use an EAL terminating at the EI board.
MBL Maintenance Board Link terminating at an IPSI board that provides
Environmental maintenance for a G650 rack mounted cabinet. This replaces
the Expansion Port-Network (EPN) maintenance board serial channel.
TACL ATM control link terminating at an ATM-TRK board. This link carries ATM
signaling commands from CAPro to the remote TN??? (ATM-TRK) boards.