Configuration Guide User guide

FastIron Configuration Guide 1979
53-1002494-02
802.1p priority override
[no] static-mac-address <mac-addr> ethernet <port> [priority <num>]
Syntax:
The <mac-addr> is the MAC address.
Specify the port variable in one of the following formats:
• FWS, FCX, and ICX stackable switches – stack-unit/slotnum/portnum
• FSX 800 and FSX 1600 chassis devices – slotnum/portnum
• ICX devices – slotnum/portnum
• FESX compact switches – portnum
The priority <num> variable can be from 0 through 7 and specifies the IEEE 802.1 equivalent to
one of the eight QoS queues.
NOTE
The location of the static-mac-address command in the CLI depends on whether you configure
port-based VLANs on the device. If the device does not have more than one port-based VLAN (VLAN
1, which is the default VLAN containing all ports), the static-mac-address command is at the global
CONFIG level of the CLI. If the device has more than one port-based VLAN, then the
static-mac-address command is not available at the global CONFIG level. In this case, the command
is available at the configuration level for each port-based VLAN.
Buffer allocation and threshold for QoS queues
By default, Brocade IronWare software allocates a certain number of buffers to the outbound
transport queue for each port based on QoS priority. The buffers control the total number of
packets permitted in the outbound queue for the port. If desired, you can increase or decrease the
maximum number of outbound transmit buffers allocated to all QoS queues, or to specific QoS
queues on a port or group of ports. For more information, refer to “Dynamic buffer allocation for
QoS priorities for FastIron X Series devices” on page 584.
802.1p priority override
You can configure a port to ignore the 802.1p priority for traffic classification for an incoming
packet. When this feature is enabled, packets will be classified as follows:
• If the packet matches an ACL that defines the priority, then ACL priority will be used.
• If the packet source or destination MAC address matches a configured static MAC address with
priority, then static MAC priority will be used.
• If the ingress port has a configured priority, then port priority will be used.
• If the other situations do not apply, the configured or default port priority (0) will be used.
Note that the original 802.1p priority in the packet will be retained. This feature does not re-mark
the 802.1p value.