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NEW QUESTION NO: 5
Which OSPFv3 router ID is valid?
A. 192.168.1.1
B. ::192.168.1.1
C. 0.0.0.0
D. 2008:db8::1
Answer: A
Explanation/Reference:
OSPFv3 Router IDs, Area IDs, and LSA link-state IDs remain at the OSPFv2 IPv4 size of 32 bits.
References: Network Configuration Example OSPF Version 3 for IPv6 Feature Guide, page 3

NEW QUESTION NO: 6
Click the Exhibit button.
user@router# run show route 2.0.0.0/8
inet.0: 101 destinations, 198 routes (100
active, 0 holddown, 1 hidden)
+ = Active Route, - = Last Active, * = Both
2.0.0.0/8 *[BGP/170] 00:ꢀ12:06, MED
1000, Localpref 100, from 10.220.1.2
As path: 2000 I,
validation-state: unverified
> to 10.220.15.2 via ge-
1/0/0.0, label-switched-path r1-to-r3
to 10.220.12.2 via ge-
1/1/0.0, label-switched-path r1-to-r3
[BGP/170] 00ꢀ10, MED
1000, localpref 100, from 10.220.1.5
AS path: 2000 I,
validation-state: unverified
> to 10.220.15.2 via ge-
1/0/0.0, label-switched-path r1-to-r3
to 10.220.12.2 via ge-
1/1/0.0, label-switched-path r1-to-r3
2.6.6.6/32 *[BGP/170] 00:12:06, MED
1000, localpref 100, from 10.220.1.2
AS path: 2000 I,
validation-state: unverified
> to 10.220.15.2 via ge-
1/0/0.0, label-switched-path r1-tor3
to 10.220.12.2 via ge-
1/1/0.0, label-switched-path r1-to-r3
[BGP/170] 00:12:10, MED
1000, localpref 100, from 10.220.1.5
AS path: 2000 I,
validation-state: unverified
> to 10.220.15.2 via ge-
1/0/0.0, label-switched-path r1-to-r3
to 10.220.12.2 via ge-
1/1/0.0, label-switched-path r1-to-r3
user@router# run show route advertising-protocol
bgp 192.168.11.0
inet.0: 101 destinations, 198 routes (100
active, 0 holddown, 1 hidden)
Prefix Nexthop
MED Lclpref AS path
* 2.6.6.6/32 Self
2000 I
[edit protocols bgp]
user@router# show
export reject;
group peer {
export as1000;
neighbor 192.168.11.0 {
family inet {
unicast;
}
peer-as 1000;
}
}
[edit policy-options]
user@router# show
policy-statement as1000 {
term 1 {
from {
route-filter 2.0.0.0/8 longer;
}
then accept;
}
term 2 {
then reject;
}
}
policy-statement reject {
term 1 {
from {
route-filter 2.0.0.0/8 exact;
}
then reject
}
}
You want to advertise routes 2.0.0.0/8 and 2.6.6.6/32 to BGP peer 192.168.11.0.
Referring to the exhibit, which configuration change would satisfy this requirement?
A. Delete the as1000 export policy.
B. Change the as1000 policy to orlonger.
C. Delete the reject export policy.
D. Change the reject policy to longer.
Answer: B
Explanation/Reference:
We must change the match type from longer to orlonger in the as1000 policy. The match type Orlonger matches if the prefix-length is equal to or greater than the route's prefix length, while the Longer match type only matches if the prefix-length is greater than the route's prefix length.
References: http://www.juniper.net/documentation/en_US/junos15.1/topics/example/policy-prefix-list.html

NEW QUESTION NO: 7
You have configured an OSPF stub area. The routes in the stub area require external reachability.
Which statement explains how OSPF meets this requirement?
A. The ABR will generate a 0.0.0.0/0 martian route in the area.
B. The ABR will flood Type 5 LSAs into the area.
C. The ABR will flood Type 7 LSAs into the area.
D. The ABR will generate a 0.0.0.0/0 default route in the area.
Answer: D
Explanation/Reference:
Reachability for routes external to OSPF is achieved via a 0/0 default route injected by the ABR.
References: https://forums.juniper.net/jnet/attachments/jnet/Learning/58/2/AJNR_Module02_OSPF- Stub_5-1-0_Alpha.ppt

NEW QUESTION NO: 8
Which two statements are true regarding the CSPF algorithm? (Choose two.)
A. The selected path for a given LSP is passed to the TED in the form of an ERO.
B. LSPs with lower numerical setup priorities are computed before LSPs with higher setup priority values.
C. The selected path for a given LSP is passed to RSVP in the form of an ERO.
D. LSPs with higher numerical setup priorities are computed before LSPs with lower setup priority values.
Answer: B,C
Explanation/Reference:
The CSPF algorithm first calculates the highest-priority LSP (the one with the lowest setup priority value).
Do I need to enable CSPF to control where to send my traffic? The answer is no. You can manually configure an Explicit Route Objects (ERO) list, and let RSVP doing the job. In the presence of the ERO object, the RSVP Path messages will follow the path specified, thus the Resv messages carrying the labels in the opposite direction.
References: https://www.netflask.net/jnpr-constrained-shortest-path-first/

NEW QUESTION NO: 9
You are provisioning a new VPLS on your PE router. Your customer needs to send Q-in-Q traffic across the VPLS.
In this scenario, which type of encapsulation is required on your PE router's VPLS interface?
A. ether-vpls-over-atm-llc
B. extended-vlan-vpls
C. vlan-vpls
D. ethernet-vpls
Answer: C
Explanation/Reference:
The logical encapsulation vlan-vpls have the valid intefaces type of 802.1Q and Q-in-Q.
References: http://www.jnpr.net/techpubs/en_US/junos-space14.2/topics/concept/layer2-provisioning- overview-service-attributes.html

NEW QUESTION NO: 10
An MX Series router has received a BGP prefix from its peer. There are multiple destination routes to the BGP prefix with the default BGP route preference.
In this scenario, what is the first tie-breaker used to select the destination route?
A. lowest MED
B. shortest cluster list length
C. highest local preference
D. lowest origin code
Answer: C
Explanation/Reference:
Understanding BGP Path Selection
For each prefix in the routing table, the routing protocol process selects a single best path. After the best path is selected, the route is installed in the routing table. The best path becomes the active route if the same prefix is not learned by a protocol with a lower (more preferred) global preference value, also known as the administrative distance. The algorithm for determining the active route is as follows:
1. Verify that the next hop can be resolved.
2. Choose the path with the lowest preference value (routing protocol process preference).
Routes that are not eligible to be used for forwarding (for example, because they were rejected by routing policy or because a next hop is inaccessible) have a preference of -1 and are never chosen.
Etc.
3. Prefer the path with higher local preference.
For non-BGP paths, choose the path with the lowest preference2 value.
Etc.
References: https://www.juniper.net/documentation/en_US/junos12.3/topics/reference/general/routing- ptotocols-address-representation.html

NEW QUESTION NO: 11
An L2VPN (draft-kompella-mpls-l2vpn) is established between two PE routers to provide connectivity between two customer sites.
Which two statements related to this deployment are true? (Choose two.)
A. BGP must be used for the control plane communications.
B. Kompella encapsulation is used in the data plane communications.
C. LDP must be used for the control plane communications.
D. Martini encapsulation is used in the data plane communications.
Answer: A,B
Explanation/Reference:
Junos OS substantially supports t RFC 4447, Pseudowire Setup and Maintenance Using the Label Distribution Protocol (LDP).
Martini uses directed LDP to signal the VPN label between the PE devices, Kompella uses BGP to signal the VPN label between the PE devices.
References: https://www.juniper.net/documentation/en_US/junos15.1/topics/reference/standards/layer-2- circuit.html

NEW QUESTION NO: 12
A new service provider asked you to design its IS-IS network. You determined that two distinct IS-IS areas will be required and you must now create an ISO addressing plan for the participating intermediate systems (routers).
In this scenario, which two statements are correct? (Choose two.)
A. The NET addresses can be configured on any interface.
B. The NET addresses must be configured on the loopback interface.
C. The system ID within the NET address must match for all intermediate systems within the same area.
D. The system ID within the NET address must unique for all intermediate systems within the same area.
Answer: A,D
Explanation/Reference:
IS-IS uses ISO network addresses. Each address identifies a point of connection to the network, such as a router interface, and is called a network service access point (NSAP).
The system identifier must be unique within the network.
References: http://www.juniper.net/documentation/en_US/junos15.1/topics/concept/is-is-routing- overview.html

NEW QUESTION NO: 13
Your customer requires a Layer 2 VPN service (draft-kompella-mpls-l2vpn). You are asked to describe the operational requirements on the PE router supporting this service.
Which two statements are true in this scenario? (Choose two.)
A. The ingress PE router associates multiple MPLS labels with the corresponding traffic flows.
B. The ingress PE router for a traffic flow maintains the data-link connection identifier.
C. The ingress PE router for a traffic flow removes the data-link connection identifier.
D. The ingress PE router associates a single MPLS label with the corresponding traffic flows.
Answer: A,C
Explanation/Reference:
A: When a packet arrives at a PE from a CE in a Layer 2 VPN, the Layer 2 address of the packet identifies to which remote attachment circuit (and thus remote CE) the packet is destined. The procedure installs a route that maps the Layer 2 address to a tunnel (which identifies the PE to which the destination CE is attached) and a VPN label (which identifies the destination AC). If the egress PE is the same as the ingress PE, no tunnel or VPN label is needed.
C: In case of IP-only Layer 2 interworking, the Layer 2 header is completely stripped off till the IP header.
References: https://tools.ietf.org/html/draft-kompella-l2vpn-l2vpn-10

NEW QUESTION NO: 14
Click the exhibit button.
user@PE2# run show 12circuit connections
Layer-2 Circuit Connections:
Legend for connection status (St)
EI - - encapsulation invalid NP - - interface
h/w not present
MM - - mtu mismatch Dn - - down
EM - - encapsulation mismatch Vc-Dn - -
Virtual circuit Down
CM - - control-word mismatch UP - -
operational
VM - - vlan id mismatch CF - - Call admission
control failure
OL - - no outgoing label IB - - TDM
incompatible bitrate
NC - - intf encaps not CCC/TCC TM - - TDM
misconfiguration
BK - - Backup Connection ST - - Standby
Connection
CB - - rcvd cell-bundle size bad SP - - Static
Pseudowire
LD - - local site signaled down RS - - remote
sity standby
RD - - remote site signaled down HS - - Hot-
standby Connection
XX - - unknown
Legend for interface status
UP - - operational
Dn - - down
Neighbor: 10.10.1.1
Interface Type St Time
last up #Up trans
ge-1/1/1.6 (vc 2) rmt VM
[edit protocols 12circuit]
user@PE2# show
neighbor 10.10.1.1. {
interface ge-1/1/1.6 {
virtual-circuit-id 2;
encapsulation-type ethernet-vlan;
}
}
[edit logical-systems jpe interfaces]
user@PE2# show
ge-1/1/1 {
unit 6 {
encapsulation vlan-ccc;
vlan-id 6;
family ccc;
}
}
user@PE1# run show 12circuit connections
logical-system kpe
Layer-2 Circuit Connections:
Legend for connection status (St)
EI - - encapsulation invalid NP - - interface
h/w not present
MM - - mtu mismatch Dn - - down
EM- - encapsulation mismatch VC-Dn - -
Virtual -circuit Down
CM - - control-word mismatch Up - -
operational
VM - - vlan id mismatch CF - - Call admission
control failure
OL - - no outgoing label IB - - TDM
incompatible bitrate
NC - - intf encaps not CCC/TCC TM - - TDM
misconfiguration
BK - - Backup connection ST - - Standby
Connection
CB - - rcvd cell-bundle size bad SP - - Static
Pseudowire
LD - - local site signaled down RS - - remote
site standby
RD - - remote site signaled down HS - - Hot-
standby Connection
XX - - unknown
Legend for interface status
Up - - operational
Dn - - down
Neighbor: 10.10.1.3
Interface Type St Time
last up # Up trans
ge-1/0/1.5 (vc 2) rmt VM
[edit protocols 12circuit]
user@PE1# show
neighbor 10.11.1.1 {
interface ge-1/0/1.5 {
virtual-circuit-id 2;
encapsulation-type ethernet-vlan;
}
}
[edit interfaces]
user@PE1#
ge-1/0/1 (
unit 5 {
encapsulation vlan-ccc;
vlan-id 5;
family ccc;
}
}
An LDP Layer 2 circuit between PE1 and PE2 is not passing traffic. Both PE1 and PE2 show the circuit state as VM - - vlan id mismatch.
Referring to the exhibit, which action will solve this problem?
A. Configure interfaces PE1:ge-1/0/1.5 and PE2:ge-1/1/1.6 with the output-vlan-map pop parameter.
B. Configure interfaces PE1:ge-1/0/1.5 or PE2:ge-1/1/1.6 with the output-vlan-map swap parameter.
C. Configure the LDP Layer 2 circuit with the no-control-word command on PE1 and PE2.
D. Configure interfaces PE1:ge-1/0/1.5 and PE2:ge-1/1/1.6 with the output-vlan-map swap parameter.
Answer: D
Explanation/Reference:
The output-vlan-map swap parameter specifies the VLAN rewrite operation to replace a VLAN tag. The outer VLAN tag of the frame is overwritten with the user-specified VLAN tag information. We do this on both interfaces.
References: http://www.juniper.net/techpubs/en_US/junos15.1/topics/reference/configuration-statement/ swap-edit-interfaces.html

NEW QUESTION NO: 15
Click the Exhibit button.
user@R1# show interfaces lo0
unit 0 {
family inet {
address 10.220.1.1/32;
}
family iso {
address 49.0001.0010.0220.0101.00;
}
}
{edit protocols isis}
user@R1# show
interface ge-1/0/1.0 {
level 2 disable;
}
interface ge-1/1/0.0 {
level 1 disable;
}
interface ge-1/1/1.0 {
level 2 disable;
}
interface lo0.0;
user@R7# show interfaces lo0
unit 0 {
family inet {
address 10.220.1.7/32;
}
family iso {
address 49.0002.0010.0220.0107.00;
}
}
{edit protocols isis]
user@R7 show
interface ge-1/0/1.0 {
level 2 disable;
}
interface lo0.0
You are trying to establish an IS-IS Level 1 adjacency over ge-1/0/1 between R1 and R7 without impacting the other IS-IS adjacencies on R1.
Which configuration change would satisfy this requirement?
A. Disable Level 2 globally on R7.
B. Change the area on R7 to match R1.
C. Disable Level 2 globally on R1.
D. Change the area on R1 to match R7.
Answer: B
Explanation/Reference:
Level 1 adjacencies can be formed between routers that share a common area number, while a Level 2 adjacency can be formed between routers that might or might not share an area number.
References: https://www.juniper.net/techpubs/en_US/junos16.1/topics/example/isis-multi-level.html