Wait For All Cards Feature; Port Transition Hold Timer; Port Flap Dampening - Dell PowerConnect B-RX Configuration Manual

6

Wait for all cards feature

Wait for all cards feature

During a system reload, an Interface module comes up after it completes its initialization process.
After an Interface module is up, its ports can come up. Since 10G modules have more packet
processors to initialize, 1G ports are up earlier than 10G ports.
This command directs all ports to come up at the same time. This is done by waiting for all
Interface modules to come up first, before allowing for ports to come up.
To have all ports come up at the same time during a system reload, enter a command such as the
following.
BigIron RX(config)# wait-for-all-cards
Syntax: [no] wait-for-all-cards
NOTE
With the wait-for-all-cards command enabled,10G ports will come up before 1G ports because
Multi-Service IronWare software processes 10G port's state changes first.

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.
For example, if VSRP is enabled on the port, the ownership would 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 trunk 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.
BigIron RX (config-if-e1000-1/2)# delay-link-event 2 down
Syntax: delay-link-event <time> up | down
The <time> parameter is the number of 50-ms units. The default is 0.
The <up> parameter means only "up" events are delayed.
The <down> parameter means that only the down events are delayed.

Port flap dampening

The port flap dampening feature allows you to configure a wait period before a port, whose link
goes down then up, becomes enabled.
138 BigIron RX Series Configuration Guide
53-1001810-01