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Dante Level 3 Test Prep

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Dante Level 3 Test Prep SCENARIO: You have a Dante system that seems to be functioning correctly, there are no external word clocks configured, no preferred master configured, but there are still a number of devices that report they are losing sync occasionally. What steps would you take to find the root cause of the problem? - ✔✔-You suspect that multicast traffic is not able to traverse the network in both directions (i.e. from master to all slaves, and from all slaves to the master). To check if this is the case you enable unicast delay requests on the slaves, then monitor the clock status histogram for evidence of disruption in PTP. When this resolves the problem you suspect that ACLs blocking multicast on UDP ports 319 and 320 in a direction from the slave to the master is to blame. -If IGMP Snooping is enabled, you test the system with no audio and IGMP Snooping turned off. When this resolves the problem you suspect that IGMP snooping has been interfering with the distribution of multicast traffic between the slaves and the master. You enable unicast delay requests on all slaves to reduce the amount of multicast traffic that the switches need to track via IGMP. Switches look at ________ - ✔✔Destination MAC addresses to forward frames Things to consider when building a network from scratch: - ✔✔Sizing links for worst case traffic loads Dante automatically changes a unicast flow to a multicast flow when necessary. - ✔✔False Dante uses ______ DSCP tags. - ✔✔4 Apart from separate cabling, a ________ can be used to separate broadcast domains. - ✔✔VLAN In a [________] transaction bandwidth is only consumed on the [________] path between a receiver and a transmitter. - ✔✔unicast, shortest A session is ________ - ✔✔an instance when a connection between two devices is created to transfer data A Dante device can have an unlimited number of receive flows. - ✔✔False How do you find out how many transmit flows you are using? - ✔✔Tx tab in Dante controller An ARP whohas message is ________ - ✔✔Broadcast Giving an external word-clock to a Dante device replaces its internal clock. - ✔✔False IGMP snooping listens for reports to [________] messages in order to restrict [________] traffic. - ✔✔IGMP query, multicast ARP tables are held in nodes - ✔✔True Match these layer numbers to the corresponding layer names in the OSI model: - ✔✔Layer 7 - Application Layer 6 - Presentation Layer 5 - Session Layer 4 - Transport Layer 3 - Network Layer 2 - Datalink Layer 1 - Physical Dante devices have a set number of flows.

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