Brocade 6910 Ethernet Access Switch Diagnostic Guide (Supporting R2.2.0.0) - Manual (Page 42)

32 Brocade 6910 Ethernet Access Switch Diagnostic Guide
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DRAFT: BROCADE CONFIDENTIAL
VLAN trunking
• Ports in a trunk must have the same speed, negotiation mode, and Quality of Service (QoS)
priority or the trunk is rejected.
• All ports configured in a trunk must be configured with the same port attributes.
• Primary port policy applies to all secondary ports. No trunk is rejected.
• The trunk is rejected if any trunk port has mirroring or monitoring configured.
• The trunk is rejected if any trunk port has VLAN or inner-VLAN translation configured (also
known as VLAN trunking).
Common diagnostic scenarios
• LACP trunk links may not operate properly between Brocade devices and third-party devices
because of a mismatch between the link configurations. If the link is fixed on the third-party
side, the link on the Brocade side must be a trunk. If it is link-aggregated on the third-party
side, then it must be the same on the Brocade side.
• LACP links may not operate properly due to misconfigurations. Contact Brocade Technical
Support for help with configuration issues.
VLAN trunking
VLAN trunking allows traffic from one VLAN to be transported across a different VLAN. Packets with
unknown VLAN IDs entering the switch at the ingress port are allowed to pass through to any
configured VLAN trunking port. When unknown VLAN traffic must pass through one or more
intermediate switches to reach its destination, you can configure VLAN flooding on ports that form
a path across the intermediate switches to connect the source of this traffic to its destination.
This feature is useful for service providers who must carry traffic from different customers across
their network while preserving the VLAN ID and priority information of the customer network.
VLAN trunking show commands
show interfaces status
Syntax: show interfaces status ethernet unit/port
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-12)
This command displays the configuration status of VLAN trunking for the specified port.
Console# show interfaces status ethernet 1/1
Information of Eth 1/1
Basic Information:
Port Type : 1000T
MAC Address : 70-72-CF-32-DD-FE
Configuration:
Name :
Port Admin : Up
Speed-duplex : Auto
Capabilities : 10half, 10full, 100half, 100full, 1000full
Broadcast Storm : Enabled
Broadcast Storm Limit : 64 Kbits/second