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Juniper MX Series by Harry Reynolds, Douglas Richard Hanks Jr.

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Chapter Review Questions

  1. Which HA features work together?

    1. NSR

    2. NSB

    3. GRES

    4. GR helper mode

    5. All of the above

  2. Which of the following is considered a negative test for NSR?

    1. Restart routing

    2. Request chassis RE master switch on master

    3. Request chassis RE master switch on backup

    4. Panic the kernel on master RE

  3. Which is false regarding graceful restart?

    1. GR will abort if instability is detected

    2. GR is hitless to the control plane, but has a slight hit to the dataplane

    3. GR and NSR cannot be configured together

    4. GR requires protocol extensions and is not transparent to peer routers

  4. Which is true regarding GRES?

    1. GRES and GR can be used together on machines with a single RE

    2. You must run the same Junos version on both REs

    3. You must synchronize configurations between REs

    4. You must wait at least 240 seconds between each GRES event

    5. Both b and c

  5. What is true regarding NSR?

    1. You can use NSR in conjunction with graceful restart

    2. You can enable NSR on machines with a single RE to provide protection from rpd faults

    3. NSR replicates protocols messages which are independently processed on the BU RE

    4. NSR replicates the master RE’s forwarding and routing state (FIB/RIB) to the backup RE

  6. Which command tells you if the backup RE has completed GRES synchronization?

    1. Show task replication on master

    2. Show task replication on backup

    3. Show system switchover on master

    4. Show system switchover on backup

  7. What command is used to confirm NSR replication?

    1. Show task replication on master

    2. Show task replication on backup

    3. Show system switchover on master

    4. Show system switchover on ...

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