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This document describes caveats for release 2.0 for the Cisco ONS 15501.
This document includes the following information:
The Cisco ONS 15501 is a low-noise, gain-flattened C-band optical erbium-doped fiber amplifier. This platform complements Cisco ONS 15540 ESP systems in network topologies requiring amplification of 1550-nm optical signals.
The default user password is edfa and the default master password is edfa1. For security reasons, you should change both passwords as soon as possible. Log in with master privileges and use the set-user-pwd and set-master-pwd commands to change the passwords.
If you have forgotten your passwords, use the restore command to reset the passwords to the defaults. The restore command can only be entered from a session on the serial port, not from a Telnet session.
This section lists caveats for the Cisco ONS 15501 by tracking number (DDTS #) and release number, and indicates whether the caveat has been corrected. An "O" indicates that the caveat is open in that release; a "C" indicates that the caveat is closed in that release.
Table 1 lists caveats for the Cisco ONS 15501.
This section describes the caveats for the Cisco ONS 15501.
Symptom: SNMP does not show the updated MIB variable name after the system image is downloaded.
Workaround: From a UNIX session, enter an snmpset command that does not modify any values in the configuration, such as the following example:
Symptom: CLI session hangs for a few minutes.
This condition occurs when the status command, or one of the commands under the status category, is executed during a change in optical input.
Workaround: The system automatically recovers in a few minutes. If immediate recovery is needed, reboot the system using a Telnet session, which does not affect the optical performance.
Symptom:Values returns for read-write objects shows inconsistency
When successive attempts are made to write (same or different) values to a read-write object and then to retrieve the value SET, occasionally the value returned for the object on GET is 'NO_SUCH_OBJECT_EXCEPTION'. This value however isn't returned very consistently.
Workaround: Implement a delay of approximately one second between subsequent GET and SET events.
Symptom: The serial CLI interface only handles ASCII characters of 8 bits or less. Any combination of an 8-bit character plus a data parity bit (9 bits total) causes the serial CLI (command-line interface) interface to lock up. All combinations of 7-bit characters plus a data parity bit are acceptable.
Workaround: Reset the serial interface by rebooting the system. Reboot the system by launching a Telnet session into the system and requesting a reboot, or by power cycling the system. Rebooting from the CLI is the preferred method because it does not disrupt the optical signal.
Symptom: The SNMP agent is nonresponsive for periods of 20 to 25 minutes after receiving a large number of requests (in the millions). The CLI sessions are still functional.
Workaround: Reboot the system with the reboot command.
Symptom: The LAN LED indicates a state opposite to the actual state of the LAN connection. The problem is caused by either forcing a change in Ethernet mode without rebooting the system, or by booting the system without an Ethernet connection and then applying the Ethernet mode. This is an indicator error only.
Workaround: When the LED is not reporting the correct state of the LAN connection, enter the ethmode command on a CLI session to show the current mode selection for the LAN connection. Enter the ethmode command again and specify the current mode selection as the command argument.
Refer to the following documents for more information about the Cisco ONS 15501:
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This document is to be used in conjunction with the documents listed in the "Related Documentation" section.
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Posted: Tue Oct 7 15:49:44 PDT 2003
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