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2017 Apr 400-101 test

Q311. Which IPv6 prefix is used for 6to4 tunnel addresses? 

A. 2001::/23 

B. 2002::/16 

C. 3ffe::/16 

D. 5f00::/8 

E. 2001::/32 



6to4 works by taking advantage of a reserved IPv6 prefix, 2002::/16. A 6to4 tunnel interface automatically converts the 32 bits in its IPv6 address following this prefix to a global unicast IPv4 address for transport across an IPv4 network such as the public Internet. 


Q312. Which regular expression will match prefixes that originated from AS200? 

A. ^$ 

B. ^200_ 

C. _200$ D. ^200) 

E. _200_ 



Example on how to deny all prefixes originated in Autonomous System 200 

router bgp 100 

neighbor remote-as 65535 

neighbor route-map map1 in 

route-map map1 permit 10 

match as-path 1 

ip as-path access-list 5 deny _200$ 

ip as-path access-list 5 permit .* 

Reference: ok/tsv_reg_express.html 

Q313. What is the maximum number of classes that MQC can support in a single policy map? 

A. 512 

B. 256 

C. 128 

D. 64 



Drag and drop the OTV component on the left to the function it performs on the right. 


Q315. Which three address family types does EIGRP support? (Choose three.) 

A. IPv4 unicast 

B. IPv4 multicast 

C. IPv6 unicast 

D. IPv6 multicast 

E. IPv4 anycast 

F. IPv6 anycast 

Answer: A,B,C 

Update 400-101 actual test:

Q316. Which two configuration changes should be made on the OTP interface of an EIGRP OTP route reflector? (Choose two.) 

A. passive-interface 

B. no split-horizon 

C. no next-hop-self 

D. hello-interval 60, hold-time 180 

Answer: B,C 


The EIGRP Over the Top feature enables a single end-to-end Enhanced Interior Gateway Routing Protocol (EIGRP) routing domain that is transparent to the underlying public or private WAN transport that is used for connecting disparate EIGRP customer sites. When an enterprise extends its connectivity across multiple sites through a private or a public WAN connection, the service provider mandates that the enterprise use an additional routing protocol, typically the Border Gateway Protocol (BGP), over the WAN links to ensure end-to-end routing. The use of an additional protocol causes additional complexities for the enterprise, such as additional routing processes and sustained interaction between EIGRP and the routing protocol to ensure connectivity, for the enterprise. With the EIGRP Over the Top feature, routing is consolidated into a single protocol (EIGRP) across the WAN. 

Perform this task to configure a customer edge (CE) device in a network to function as an EIGRP Route Reflector: 

1. enable 

2. configure terminal 

3. router eigrp virtual-name 

4. address-family ipv4 unicast autonomous-system as-number 

5. af-interface interface-type interface-number 

6. no next-hop-self 

7. no split-horizon 

8. exit 

9. remote-neighbors source interface-type interface-number unicast-listen lisp-encap 

10. network ip-address 

11. end 

Note. Use no next-hop-self to instruct EIGRP to use the received next hop and not the local outbound interface address as the next hop to be advertised to neighboring devices. If no next-hop-self is not configured, the data traffic will flow through the EIGRP Route Reflector. 


Q317. Refer to the exhibit. 

R2 is unable to access the network between R1 and R3. Which option is a possible reason for the failure? 

A. The seed metric for redistributing into RIP on R3 is missing. 

B. The OSPF processes on R2 and R3 are different. 

C. Auto-summary is misconfigured under the RIP process of R3. 

D. The subnet mask on the link between R2 and R3 is smaller than /30. 

E. The wildcard mask on R3 is misconfigured. 



The problem is that RIP requires a seed metric to be specified when redistributing routes into that protocol. A seed metric is a "starter metric" that gives the RIP process a metric it can work with. The OSPF metric of cost is incomprehensible to RIP, since RIP's sole metric is hop count. 

Reference: l%20Route%20Redistribution%20Seed%20Metric.htm 


Drag and drop Layer 2 QoS Commands on the left to the corresponding functions on the right. 


Q319. Which two features does the show ipv6 snooping features command show information about? (Choose two.) 

A. RA guard 

B. DHCP guard 

C. ND inspection 

D. source guard 

Answer: A,C 


The show ipv6 snooping features command displays the first-hop features that are configured on the router. Examples 

The following example shows that both IPv6 NDP inspection and IPv6 RA guard are configured on the router: 

Router# show ipv6 snooping features 

Feature name priority state 

RA guard 100 READY 

NDP inspection 20 READY 


Q320. Which two Cisco IOS XE commands can install a subpackage onto a router? (Choose two.) 

A. request platform software package install rp rpSlotNumber file fileURL 

B. boot system flash bootflash:filename 

C. copy sourceUrl destinationUrl 

D. license install file storedLocationUrl 

E. issu loadversion rp identifier file diskType imageFilename 

F. config-register value 

Answer: A,C 


. Managing and Configuring a Consolidated Package Using the request platform software package install Command 

In the following example, the request platform software package install command is used to upgrade a consolidated package running on RP 0. The force option, which forces the upgrade past any prompt (such as already having the same consolidated package installed), is used in this example. 

Router# request platform software package install rp 0 file bootflash:asr1000rp1-adventerprisek9. force 

To upgrade a consolidated package on the Cisco ASR 1000 Series Routers using the copy command, copy the consolidated package into the bootflash: directory on the router using the copy command as you would on most other Cisco routers. After making this copy, configure the router to boot using the consolidated package file. In the following example, the consolidated package file is copied onto the bootflash: file system from TFTP. The config-register is then set to boot using boot system commands, and the boot system commands instruct the router to boot using the consolidated package stored in the bootflash: file system. The new configuration is then saved using the copy running-config startup-config command, and the system is then reloaded to complete the process. 

Router# dir bootflash: 

Directory of bootflash:/ 

11 drwx 16384 Dec 4 2007 04:32:46 -08:00 lost+found 

86401 drwx 4096 Dec 4 2007 06:06:24 -08:00.ssh 

14401 drwx 4096 Dec 4 2007 06:06:36 -08:00.rollback_timer 

28801 drwx 4096 Mar 18 2008 17:31:17 -07:00.prst_sync 

43201 drwx 4096 Dec 4 2007 04:34:45 -08:00.installer 

13 -rw- 45977 Apr 9 2008 16:48:46 -07:00 target_support_output.tgz.tgz 

928862208 bytes total (712273920 bytes free) 

Router# copy tftp bootflash: 

Address or name of remote host []? 

Source filename []? /auto/tftp-users/user/asr1000rp1-adventerprisek9. 

Destination filename [asr1000rp1-adventerprisek9.]? 

Reference: /Package_Management.html#78189