Foundry Networks Switch and Router, Руководство по установке и настройке

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Foundry Switch and Router Installation and Configuration Guide
10 - 22 December 2000
BigIron# clear logging
Syntax: clear logging
USING THE WEB MANAGEMENT INTERFACE
To clear Syslog messages using the Web management interface, use the following procedure:
1. Log on to the device using a valid user name and password for read-write access. The System configuration
panel is displayed.
2. Click on the plus sign next to Command in the tree view to display the command options.
3. Select the Clear link to display the Clear panel.
4. Click on the checkbox next to System Logging to place a checkmark in the box.
5. Click Apply to clear the log.
Changing the Default Gigabit Negotiation Mode
You can configure the default Gigabit negotiation mode to be one of the following:
• Negotiate-full-auto – The port first tries to perform a handshake with the other port to exchange capability
information. If the other port does not respond to the handshake attempt, the port uses the manually
configured configuration information (or the defaults if an administrator has not set the information). This is
the default for Chassis devices (including the TurboIron/8).
• Auto-Gigabit – The port tries to perform a handshake with the other port to exchange capability information.
• Negotiation-off – The port does not try to perform a handshake. Instead, the port uses configuration
information manually configured by an administrator.
NOTE: This feature applies only to Chassis devices and the TurboIron/8. For Stackable devices, the default
behavior is auto-Gigabit, but you can configure individual Gigabit ports on Stackable devices for negotiation-off.
See “Changing the 802.3x Gigabit Negotiation Mode” on page 10-32.
Although the standard for 100BaseTX ports provides an option for a negotiating port to link with a non-negotiating
port, the 802.3x standard for Gigabit ports does not provide this option. As a result, unless the ports at both ends
of a Gigabit Ethernet link use the same mode (either auto-Gigabit or negotiation-off), the ports cannot establish a
link. An administrator must intervene to manually configure one or both sides of the link to enable the ports to
establish the link.
Foundry Chassis software provides a solution by changing the default negotiation behavior for Gigabit Ethernet
ports on Chassis devices. The new default behavior allows a port to establish a link with another port whether the
other port is configured for auto-Gigabit or negotiation-off. By default, Gigabit Ethernet ports first attempt auto-
Gigabit. If auto-Gigabit does not succeed (typically because the port at the other end is not configured for auto-
Gigabit), the port switches to negotiation-off.
Backward Compatibility
When you upgrade a Chassis device that is running software older than 05.2.00, the new software makes
modifications to the running-config and startup-config files to ensure that the negotiation settings remain
unchanged for the installed device. For new devices running 05.2.00, the default for all Gigabit Ethernet ports is
negotiate-full-auto.
To provide the backward compatibility, the software places a line in the running-config file to identify the software
version that generated the file. For software release 05.2.00, the version line is as follows: “version 05.2.00”.
When you save configuration changes to the startup-config file, the software assumes, based on the presence of
the version line in the running-config file, that the device is running software release 05.2.00 or later, which
contains the change to the Gigabit Ethernet negotiation default.
If the device already has a startup-config file when you update to software release 05.2.00, the software adds the
following command to the startup-config file:
gig-default neg-off . This command sets the global negotiation
mode to negotiation-off, the default behavior in software releases earlier than 05.2.00. By setting the default
mode to negotiation-off, the new software ensures that the device’s Gigabit Ethernet links continue to operate as