4A0-101 - Alcatel-Lucent Interior Routing Protocols and High Availability
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What command allows analysis of the Dijkstra calculation on the Alcatel-Lucent 7750 SR?
Show router isis spf
What is the default preference value for a static route in the Alcatel-Lucent 7750 SR router?
How many bytes make up the system ID in an IS-IS NSAP address on the Alcatel-Lucent 7750 SR?
Which of the following statements describe the major features of OSPF? Choose two answers.
Traffic engineering extensions
When IS-IS elects a DIS, what is used as the tie breaker on an Alcatel-Lucent 7750 SR, if the priorities are the same?
The highest interface MAC address.
How are IS-IS LSPs sent on point-to-point links?
They are sent using a unicast address.
If a Router originates a type 1 router LSA with the E bit set what types of areas can it belong to? Select all that apply.
Not So Stubby Area
What are the similarities between OSPF and IS-IS? Choose two.
Metric is cost based
What is the term used for the updates sent by IS-IS?
Link State PDUs
Which of the following commands can be used to display the number of SPF computations that have been performed on a router?
show router ospf area <area-id>
Which of the statements below best describes the pseudonode in an IS-IS network?
The DIS creates a logical node to represent a broadcast sub-network; this node is the pseudonode
A default route for a client is also known as the:
What are the default Hello and Dead timer intervals for OSPF on the Alcatel-Lucent 7750 SR?
10 and 40 seconds
Which of the following statements regarding the election of the designated router (DR) by OSPF routers are true? (Choose two)
The router with the highest priority is the DR.
If priorities are the same, the DR is chosen based on the highest RID.
NSSA LSA packets are what type within an NSSA area, and are converted to what other type at the ABR?
They are type 7 within the area and converted to type 5 at the ABR
Which of the following types of network topologies are supported by IS-IS on the Alcatel-Lucent 7750 SR? Choose two answers.
What are the three databases maintained by a Link State Protocol?
Neighbor, topology, forwarding
The Alcatel-Lucent 7750 SR supports which two of the OSPF area types below?
Not So Stubby Areas
What are some of the characteristics of Alcatel-Lucent's implementation of non-stop routing? (Choose two)
No protocol extensions required
Transparent to routing neighbors
What is the metric and maximum routable value for RIP?
Hop count and 15
What is the source IP address in an OSPF update?
The unicast IP address of the interface the update is being sent on.
What must be configured on the Alcatel-Lucent 7750 SR for RIP to advertise locally attached links?
A policy statement within the router identifying what is to be advertised
An OSPF router receives an update in which the sequence number, age, and checksum are the same as the entry already in the topological database. What action is taken by the router?
The link state information is not populated in the database and an acknowledgement is sent
What is the value of the protocol discriminator used to denote IS-IS protocol information?
In an OSPF Hello packet what fields must match all neighbor routers on the segment? (Choose 3)
Hello and Dead Intervals
From the list below select the statements that describe the behavior of link state information aging. (Choose 2)
The age for newly created link state information is set to 0 for OSPF and 1200 for IS-IS
The age is incremented or decremented as it is flooded from router to router and as it is held in the topological database.
Graceful Restart is supported by what IGPs?
Which of the following is NOT a characteristic of RIPv1?:
Which of the following statements regarding IS-IS Hello packets are true? Choose two answers.
Different types of Hello packets are exchanged on point-to-point networks than on broadcast networks.
Different L1 and L2 Hello packets are exchanged on broadcast links.
What modes of authentication are supported for RIPv2 on the Alcatel-Lucent 7750 SR?
RIPv2 does not support authentication, password and MD5 authentication.
Identify two attributes of Distance Vector Protocols: (Choose two)
Use split horizon by default.
Use holddown timers when topologies change to allow for convergence.
In an OSPF Hello packet, which of the following fields must match for all neighbor routers on the segment? Choose three answers.
Area ID W B.
Hello and Dead intervals PC.
In IS-IS, which of the following statements regarding an L1/L2 router is false?
An L1/L2 router sets the ATT bit in L1 LSPs to identify itself as an L1 router.
What is the default priority value used for electing the DR on an Alcatel-Lucent 7750 SR running OSPF on an Ethernet?
Priority of 1
What address is used when RIPv2 uses multicast to send its updates?
Which type of IS-IS router is summarization most likely to be configured on?
What causes an adjacency to change from down to two ways?
When a router receives a Hello packet that contains its own router ID in the neighbor list from a neighbor.
What command could be used to verify proper configuration of a static route in an Alcatel-Lucent 7750 SR router?
Show router route-table
Given the NSAP address of 49.0012.1234.1234.1234.00, what area does the IS-IS router reside in?
What is the default inbound metric for RIP on the Alcatel-Lucent 7750 SR?
A value of 1.
What best describes the type of packets used by OSPF routers to exchange updates on a pointto-point link?
IP packets sent to an IP multicast address.
What command will show the OSPF neighbors, and their status on the Alcatel-Lucent 7750 SR?
Show router ospf neighbors
What acts as the tie breaker on an Alcatel-Lucent 7750 SR if the priorities are the same when IS-IS is electing a DIS?
The system ID
What type of OSPF router generates a type 2 LSA?
What are the types of routers in an IS-IS topology? Choose all that apply.
An OSPF ASBR must have at least one interface in the backbone area (area 0)
What value should the AFI be set to for locally administered addressing?
Which of the LSA types stay within an OSPF area and are not exported outside of the area? (Choose all that apply)
Two IS-IS L1/L2 routers are in the same area on the same Ethernet segment. How many adjacencies will be formed between them?
Choose the Distance Vector Protocols from the list below: