Juniper MX Series

Chapter Review Questions

1. What’s the maximum number of PE routers that can participate in MC-LAG?

   1. 1

   2. 2

   3. 3

   4. 4

2. Can active-active MC-LAG be used with DPC line cards?

   1. Yes

   2. No

3. Does the service-id have to match between PE routers?

   1. Yes

   2. No

4. Does the chassis-id have to match between PE routers?

   1. Yes

   2. No

5. What’s the purpose of mc-ae-id?

   1. A unique identifier to partition different MC-LAG interfaces

   2. A unique identifier to group together interfaces across different PE routers to form a single logical interface facing towards the CE

   3. A unique identifier for each physical interface

   4. A unique identifier for each routing instance

6. What is a redundancy-group?

   1. A collection of MC-LAG interfaces

   2. Serves as a broadcast medium for applications between PE routers

   3. Provides physical interface redundancy

   4. Used by ICCP to update MAC addresses

7. Which MC-LAG mode requires an ICL?

   1. active-active

   2. active-standby

8. How does MC-LAG active-standby influence how the CE forwards traffic?

   1. Administratively disables one of the interfaces

   2. Physically shuts down one of the interfaces

   3. Removes one of the interfaces from the LACP bundle

   4. Places one of the interfaces of the CE into a Mux State of “Attached”

9. Which feature provides more routing engine scale?

   1. MC-LAG

   2. MX-VC

10. What IFFs are supported on MC-LAG interfaces (as of Junos 11.4)?

    1. inet

    2. bridge

    3. vpls

    4. ccc