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Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) Questions 257–264 (page: 34)

Updated On: 9-Jul-2026

Refer to the exhibit.



The network administrator configured the Chicago router to mutually redistribute the LA and NewYork routes with OSPF routes to be summarized as a single route in EIGRP using the longest summary mask:

router eigrp 100
redistribute ospf 1 metric 10 10 10 10 10
router ospf 1 redistribute eigrp 100 subnets
!
interface E 0/0
ip summary-address eigrp 100 172.16.0.0 255.255.0.0

After the configuration, the New York router receives all the specific LA routes but the summary route. Which set of configurations resolves the issue on the Chicago router?

  1. router eigrp 100
    summary-address 172.16.8.0 255.255.252.0
  2. interface E 0/1
    ip summary-address eigrp 100 172.16.8.0 255.255.252.0
  3. router eigrp 100
    summary-address 172.16.0.0 255.255.0.0
  4. interface E 0/1
    ip summary-address eigrp 100 172.16.0.0 255.255.0.0

Answer(s): B



Refer to the exhibit. An engineer must configure PBR on R1 to reach to 10.2.2.0/24 via R3 AS64513 as the primary path and a backup route through default route via R2 AS64513. All BGP routes are in the routing table of R1, but a static default route overrides BGP routes. Which PBR configuration achieves the objective?

  1. access-list 100 permit ip 10.1.1.0 0.0.0.255 10.2.2.0 0.0.0.255
    !
    route-map PBR permit 10
    match ip address 100
    set ip next-hop recursive 10.3.3.1
  2. access-list 100 permit ip 10.1.1.0 255.255.255.0 10.2.2.0 255.255.255.0
    !
    route-map PBR permit 10
    match ip address 100
    set ip next-hop recursive 10.3.3.1
  3. access-list 100 permit ip 10.1.1.0 0.0.0.255 10.2.2.0 0.0.0.255
    !
    route-map PBR permit 10
    match ip address 100
    set ip next-hop 10.3.3.1
  4. access-list 100 permit ip 10.1.1.0 255.255.255.0 10.2.2.0 255.255.255.0
    !
    route-map PBR permit 10
    match ip address 100
    set ip next-hop 10.3.3.1

Answer(s): A



What is the function of BFD?

  1. It creates high CPU utilization on hardware deployments
  2. It provides uniform failure detection on the same media type
  3. It provides uniform failure detection regardless of media type
  4. It negotiates to the highest version if the neighbor version differs

Answer(s): C



Refer to the exhibit. When an FTP client attempts to use passive FTP to connect to the FTP server, the file transfers fail. Which action resolves the issue?

  1. Modify traffic filter FTP-SERVER in to the outbound direction.
  2. Configure active FTP traffic.
  3. Configure to permit TCP ports higher than 1023.
  4. Modify FTP-SERVER access list to remove established at the end.

Answer(s): C



Refer to the exhibit. An administrator configured a Cisco router for TACACS authentication, but the router is using the local enable password instead. Which action resolves the issue?

  1. Configure the aaa authentication login default group admin local if-authenticated command instead.
  2. Configure the aaa authentication login admin group tacacs+ local enable none command instead.
  3. Configure the aaa authentication login admin group tacacs+ local if-authenticated command instead.
  4. Configure the aaa authentication login admin group admin local enable command instead.

Answer(s): D


Reference:

https://community.cisco.com/t5/network-access-control/problem-setting-7606-router-for-tacacs-authentication/td-p/2316903



An administrator attempts to download the .pack NBAR2 file using TFTP from the CPE router to another device over the Gi0/0 interface. The CPE is configured as below:

hostname CPE
!
ip access-list extended WAN
<`¦>
remark => All UDP rules below for WAN ID: S421T18E58F90
permit udp any eq domain any
permit udp any any eq tftp
deny udp any any
!
interface GigabitEthernet0/0
<`¦>
ip access-group WAN in
<`¦>
!
tftp-server flash:pp-adv-csr1000v-1612.1a-37-53.0.0.pack

The transfer fails. Which action resolves this issue?

  1. Make the permit udp any eq tftp any entry the last entry in the WAN ACL
  2. Shorten the file name to the 8+3 naming convention
  3. Change the WAN ACL to permit the entire UDP destination port range
  4. Change the WAN ACL to permit the UDP port 69 to allow TFTP

Answer(s): C



A network administrator must optimize the segment size of the TCP packet on the DMVPN IPsec protected tunnel interface, which carries application traffic from the head office to a designated branch. The TCP segment size must not overwhelm the MTU of the outbound link. Which configuration must be applied to the router to improve the application performance?

  1. interface tunnel30
    ip mtu 1400
    ip tcp payload-size 1360
    !
    crypto ipsec fragmentation before-encryption
  2. interface tunnel30
    ip mtu 1400
    ip tcp adjust-mss 1360
    !
    crypto ipsec fragmentation after-encryption
  3. interface tunnel30
    ip mtu 1400
    ip tcp max-segment 1360
    !
    crypto ipsec fragmentation before-encryption
  4. interface tunnel30
    ip mtu 1400
    ip tcp packet-size 1360
    !
    crypto ipsec fragmentation after-encryption

Answer(s): B


Reference:

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_conn_dmvpn/configuration/15-mt/sec-conn-dmvpn-15-mt-book/sec-conn-dmvpn-dmvpn.html



In a DMVPN network, the Spoke1 user observed that the voice traffic is coming to Spoke2 users via the hub router. Which command is required on both spoke routers to communicate directly to one another?

  1. ip nhrp nhs multicast
  2. ip nhrp shortcut
  3. ip nhrp map dynamic
  4. ip nhrp redirect

Answer(s): B



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