138BigIron RX Series Configuration Guide53-1001810-01Wait for all cards feature6Wait for all cards featureDuring 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 packetprocessors 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 allInterface 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 thefollowing.BigIronRX(config)#wait-for-all-cardsSyntax: [no] wait-for-all-cardsNOTEWith the wait-for-all-cards command enabled,10G ports will come up before 1G ports becauseMulti-Service IronWare software processes 10G port’s state changes first.Port transition hold timerUsing the delay-link-event command will delay the sending of port "up" or "down" events to Layer 2protocols. While link down events are reported immediately in syslog, their effect on higher levelprotocols such as OSPF is delayed according to how the delay-link-event is configured. Thiscommand affects the physical link events. However, the resulting logical link events are alsodelayed. This is a per-interface command.For example, if VSRP is enabled on the port, the ownership would not change until the port statushas remained up or down for the configured amount of time to ensure that minor transient statesof a link do not unintentionally cause a disruptive topology change in the network.NOTEAll 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 isdetected "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 layerapplications not to be affected by a port state flapping.BigIronRX(config-if-e1000-1/2)#delay-link-event2downSyntax: delay-link-event The The parameter means only "up" events are delayed.The parameter means that only the down events are delayed.Port flap dampeningThe port flap dampening feature allows you to configure a wait period before a port, whose linkgoes down then up, becomes enabled.
