Troubleshooting guide

15
Software Upgrade Procedures
LSCle01318 OC3 Port
OC-3 card continuously bounced when connected to SONET MUX.
When connecting an OC3 port to a SONET multiplexor, you should normally use a clocking type of
external (rather than the default of internal). Use of internal clocking may prevent the port from
operating correctly.
LSCle01369 External SNMP
External SNMP devices impact system performance.
The NP software does not throttle excess traffic from external SNMP devices. This can consume
CPU resources and cause timeouts, such as spanning-tree timeouts that degrade system
performance. Typical sources of SNMP packets include the LightStream 2020 monitor, HP
OpenView statistical graphing facilities that display a large number of MIB variables, and
third-party network management applications. When SNMP traffic is degrading system
performance, you must reduce the SNMP traffic from the external device. You might reduce the
number of variables being tracked, increase the polling interval, or reduce the number of concurrent
network management processes which are requesting data.
LSCle02116 Testing a Card
The command set card card# testing no longer works and is rejected by the CLI. The test command
puts the card in the testing state. Use the command test card# -m to put card card# in the testing
state, load diagnostics, and establish an I/O tap connection from the CLI to card card#.
LSCle01599 Installation and Troubleshooting Manual
The Release 2.0 Installation and Troubleshooting Manual, on page 3-38, says to search the
/etc/services file for the string snmp-traps. It should say to search for the string snmp-trap.
Page 3-42 of the same document suggests that you change the polling interval to 1 minute. The
polling interval should be left at the default of 5 minutes.
LSCle02666 Ping Requests and Responses
When connected to an FDDI with an AGS+, the LightStream 2020 switch loses a small number of
ping requests and responses. Probes on the FDDI Access Card have detected the LightStream 2020
inserting an IDLE/VIOLATION symbol pair and idles after the source address is transmitted. The
cause and conditions for this behavior are not currently known. The problem is under investigation.
Software Upgrade Procedures
This section provides information about upgrading the LightStream 2020 enterprise ATM switch to
release 2.0.9 of LightStream 2020 software.
Note The following procedures are for upgrades, not for new installations. If you are installing a
network processor (NP) with an uninitialized disk, use the installation procedures given in the
LightStream 2020 Installation Guide. Use the upgrade procedures described here only if you are
upgrading software on a LightStream 2020 node that has already been installed and is running.