Quick Reference Guide

30 PowerConnect B-Series TI24X Configuration Guide
53-1002269-02
Configuring basic port parameters
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PowerConnect(config)# interface ethernet 1
PowerConnect(config-if-e10000-1)# ipg-xgmii 120
IPG 120(128) has been successfully configured for port 1
Syntax: [no] ipg-xgmii bit time
Enter 96-192 for bit time. The default is 96 bit time.
Changing the Gbps fiber negotiation mode
The globally configured Gbps negotiation mode is the default mode for all Gbps fiber ports. You
can override the globally configured default and set individual ports to 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.
• Auto-Gbps – 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.
To change the mode for individual ports, enter commands such as the following.
PowerConnect(config)# int ethernet 1 to 4
PowerConnect(config-mif-1-4)# gig-default auto-gig
This command overrides the global setting and sets the negotiation mode to auto-Gbps for ports 1
– 4.
Syntax: gig-default neg-full-auto | auto-gig | neg-off
NOTE
When Gbps negotiation mode is turned off (CLI command gig-default neg-off), the device may
inadvertently take down both ends of a link. This is a hardware limitation for which there is currently
no workaround.
Modifying port priority (QoS)
You can give preference to the inbound traffic on specific ports by changing the Quality of Service
(QoS) level on those ports. For information and procedures, refer to Chapter 15, “Configuring
Quality of Service”.
Configuring port flap dampening
Port Flap Dampening increases the resilience and availability of the network by limiting the number
of port state transitions on an interface.
If the port link state toggles from up to down for a specified number of times within a specified
period, the interface is physically disabled for the specified wait period. Once the wait period
expires, the port link state is re-enabled. However, if the wait period is set to zero (0) seconds, the
port link state will remain disabled until it is manually re-enabled.