Free H31-161 Exam Braindumps
HCIE-Carrier IP (Written) Questions 66–70 (page: 15)

Refer to the exhibit.



As shown in the figure, RT 5 is a stub area router, an external Internet route is imported by RT 1, and a virtual connection is established between RT 1 and RT 3.At present, the Internet is accessible to routers except RT 5.
Why can the Internet not be accessed from RT 5?(Select two answers)

Refer to the exhibit.



As shown in the topology, RTB directly connects to RTC through the POS interface. To implement the TE function, RTB and RTC are configured as follows:
Configuration of RTB:
mpls lsr-id 2.2.2.2
mpls mpls te mpls rsvp-te mpls te cspf
#
isis 1
is-level level-2

cost-style compatible network-entity 00.2222.2222.2222.00
traffic-eng level-1-2
log-peer-change
#
interface Pos4/1/0
clock master link-protocol ppp ip address 22.33.22.33 255.255.0.0
isis enable 1
mpls mpls templs rsvp-te
Configuration of RTC:
#
mpls lsr-id 3.3.3.3
mpls mpls te mpls rsvp-te mpls te cspf
#
isis 1
is-level level-2
cost-style wide network-entity 00.3333.3333.3333.00
traffic-eng level-1-2
log-peer-change
# #
interface Pos5/1/0
link-protocol ppp ip address 22.33.33.22 255.255.0.0
isis enable 1
mpls mpls te mpls rsvp-te
When a neighbor relationship is set up between RTB and RTC and becomes robust, the following information can be found in the LSDB of RTB.
Database information for IS-IS(1)
--------------------------------
Level-2 Link State Database
LSPID Seq Num Checksum Holdtime Length ATT/P/OL
2222.2222.2222.00-00* 0x00007191 0x6689 1190 239 0/0/0
SOURCE 2222.2222.2222.00
NLPID IPV4
AREA ADDR 00
INTF ADDR 22.33.22.33
NBR ID 3333.3333.3333.00 COST: 10
+NBR ID 3333.3333.3333.00 COST: 10
IP-Internal 22.33.0.0 255.255.0.0 COST: 10

+IP-Extended 22.33.0.0 255.255.0.0 COST: 10
Router ID 2.2.2.2
3333.3333.3333.00-00 0x0000001c 0x14a3 1184 188 0/0/0
SOURCE 3333.3333.3333.00
NLPID IPV4
AREA ADDR 00INTF ADDR 22.33.33.22
+NBR ID 2222.2222.2222.00 COST: 10
+IP-Extended 22.33.0.0 255.255.0.0 COST: 10
Router ID 3.3.3.3
Two records are generated for the same NBR ID, as shown in bold fonts.
Which statement is true?

As shown in the figure, DUT stands for the device under test and RTA is used to support the test.
Which combination of the following configurations is mandatory for fast convergence?
1. BFD
2. Minimum LSP refreshing interval

3. Most sensitive SPF timer
4. Minimum Hello packet sending interval
5. Minimum LSP sending interval
6. Longest computing time of SPF slices
7. Minimum LSP retransmission interval
8. Minimum LSP generation time
9. Flash-flood
10. GR function
11. Setting cost-style to wide

Refer to the exhibit.



As shown in the figure, RTA, RTB, RTC, and RTD are connected through a switch. From small to large in order of the MAC address, the four routers are arranged as follows:
RTB, RTA, RTD, and RTC. The Level-2 DIS priority is set to 100 on RTB and RTD, and IS-IS BFD is enabled on all these routers.
When the links of RTB are down, how should IS-IS BFD sessions be set up?

Refer to the exhibit.



As shown in the figure, DUT stands for the device under test and RTA is used to support the test.What is the correct procedure of a fast convergence test? ( )
1. Read data from the tester, record the numbers of sent and received packets, and count the number of lost packets.2. Switch the DUT-to-RTA background traffic to the link whose metric value is 100.3. DUT-to-RTA background traffic is forwarded along the link whose metric value is 10.4. Use the tester to advertise 10K routes to RTA and inject 10K flows to the DUT (each flow takes one route).5. Remove the optical fiber (providing a link whose metric value is 10) from the tester.6. Calculate the convergence time based on the number of lost packets and packet sending rate.7. Stop forwarding traffic when the packet receiving rate is equal to the packet sending rate.