Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 37)

Multi-Service IronWare Switching Configuration Guide 7
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Modifying port priority (QoS)
1
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 the
Configuring Quality of
Service for the Brocade NetIron XMR and Brocade MLX series Chapter in the Multi-Service
IronWare Traffic Management Configuration Guide.
Setting IP VPN packets with a TTL value of 1
to be dropped
This command is for IP VPN packets only. Under normal conditions IP VPN packets with a TTL value
equal to 0 are always dropped in hardware regardless of the setting of this command. With this
command set, IP VPN packets with TTL value equal to one will also be dropped in hardware.
To enable this command use the following command.
Brocade(config)# interface ethernet 4/1 to 4/4
Brocade(config-if-4/1)# hw-drop-bad-ttl-pkt
Syntax: [no] hw-drop-bad-ttl-pkt
The default value is off.
Port transition hold timer
Using the delay-link-event command will delay the sending of port “up” or “down” events to Layer 2
protocols. While link down events are reported immediately in syslog, their effect on higher level
protocols such as OSPF is delayed according to how the delay-link-event is configured. This
command affects the physical link events. However, the resulting logical link events are also
delayed. This is a per-interface command.
NOTE
When a Layer 2 protocol packet is received before the delay-link-event is expired, NetIron will reply
to the received Layer 2 protocol without the delay-link-event. After the delay-link-event is expired,
NetIron will retransmit the previous Layer 2 event.
For example, if VSRP is enabled on the port, the ownership will not change until the port status has
remained up or down for the configured amount of time to ensure that minor transient states of a
link do not unintentionally cause a disruptive topology change in the network.
NOTE
All LAG ports must have the same delayed-link-down-event configuration.
The following command will delay the sending of port “down” event for 100ms when a port state is
detected “down”. If the port state is detected “up” afterwards within 100ms, the delayed “down”
event is cancelled; otherwise, the “down” event is sent after 100ms. This allows the upper layer
applications not to be affected by a port state flapping.
Brocade (config-if-e1000-1/2)# delay-link-event 2 down
Syntax: [no] delay-link-event time up | down