Technical data

FastIron Ethernet Switch Administration Guide 59
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Basic port parameter configuration
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• 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.
Brocade(config)# interface ethernet 1 to 4
Brocade(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 Brocade device
may inadvertently take down both ends of a link. This is a hardware limitation for which there is
currently no workaround.
Port priority (QoS) modification
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 “Quality of Service” chapter in
the FastIron Ethernet Switch Traffic Management Guide.
Dynamic configuration of Voice over IP (VoIP) phones
You can configure a FastIron device to automatically detect and re-configure a VoIP phone when it
is physically moved from one port to another within the same device. To do so, you must configure
a voice VLAN ID on the port to which the VoIP phone is connected. The software stores the voice
VLAN ID in the port database for retrieval by the VoIP phone.
The dynamic configuration of a VoIP phone works in conjunction with the VoiP phone discovery
process. Upon installation, and sometimes periodically, a VoIP phone will query the Brocade device
for VoIP information and will advertise information about itself, such as, device ID, port ID, and
platform. When the Brocade device receives the VoIP phone query, it sends the voice VLAN ID in a
reply packet back to the VoIP phone. The VoIP phone then configures itself within the voice VLAN.
As long as the port to which the VoIP phone is connected has a voice VLAN ID, the phone will
configure itself into that voice VLAN. If you change the voice VLAN ID, the software will immediately
send the new ID to the VoIP phone, and the VoIP phone will re-configure itself with the new voice
VLAN.
VoIP configuration notes
• This feature works with any VoIP phone that:
- Runs CDP
- Sends a VoIP VLAN query message
- Can configure its voice VLAN after receiving the VoIP VLAN reply