最新的Cisco Implementing Cisco Service Provider Advanced Routing Solutions - 300-510免費考試真題
Refer to the exhibit. While troubleshooting a networking issue, an engineer identified a suboptimal communication issue on route reflector RR2. In the current environment:
- Router A is a non-route-reflector client for RR1 and RR2.
- Routers D and E are directly connected iBGP peers.
- Router F is not an iBGP peer of routers D and E.
Which action resolves the issue?
- Router A is a non-route-reflector client for RR1 and RR2.
- Routers D and E are directly connected iBGP peers.
- Router F is not an iBGP peer of routers D and E.
Which action resolves the issue?
正確答案: D
Which two conditions must be met before separate ISPs can provide interdomain multicast routing? (Choose two.)
正確答案: B,C
說明：（僅 Fast2test 成員可見）
SIMULATION
Guidelines
This is a lab item in which tasks will be performed on virtual devices.
- Refer to the Tasks tab to view the tasks for this lab item.
- Refer to the Topology tab to access the device console(s) and perform the tasks.
- Console access is available for all required devices by clicking the device icon or using the tab(s) above the console window.
- All necessary preconfigurations have been applied.
- Do not change the enable password or hostname for any device.
- Save your configurations to NVRAM before moving to the next item.
- Click Next at the bottom of the screen to submit this lab and move to the next question.
- When Next is clicked, the lab closes and cannot be reopened.
Topology
Tasks
Star Technology has decided to establish connectivity with an ISP for accessing the Internet. In phase 1, the approach is to establish a dual-homed connection from HQ-R1 to ISP-R1 and ISP- R2. This will provide some degree of redundancy in the connectivity between HQ-R1 and ISP routers.
Based on network design, an autonomous system of Star Technology is 1, and AS of ISP is 2. A network Implementation Engineer has already initiated the configuration; trouble-shooting is required to find out and complete missing configurations. Moreover, configuration is to be established in a way that links between HQ-R1 and ISP-R1 can be used as the preferred path for reaching AS 2.
Below are tasks to be achieved to include the missing commands and complete the troubleshooting Task 1:
On HQ-R1, configure BGP for Autonomous System 1. Establish EBGP relationship with ISP-R1 and ISP-R2.
Notes:
After performing troubleshooting at HQ-R1, the following outcome should appear.
%BGP-5-ADJCHANGE: neighbor 192.168.12.2 Up
%BGP-5-ADJCHANGE: neighbor 192.168.13.2 Up
Task 2:
On HQ-R1, Advertise LBO interface as a prefix in BGR
Task 3:
On HQ-R1, configure the route map with the name loc. Set the local preference attribute as 900.
Task 4:
On HQ-R1, define the path between HQ-R1 - ISP-R1 as the preferred path for reaching AS 2.
Route map configured in task 3 to be used in the inbound direction.
Guidelines
This is a lab item in which tasks will be performed on virtual devices.
- Refer to the Tasks tab to view the tasks for this lab item.
- Refer to the Topology tab to access the device console(s) and perform the tasks.
- Console access is available for all required devices by clicking the device icon or using the tab(s) above the console window.
- All necessary preconfigurations have been applied.
- Do not change the enable password or hostname for any device.
- Save your configurations to NVRAM before moving to the next item.
- Click Next at the bottom of the screen to submit this lab and move to the next question.
- When Next is clicked, the lab closes and cannot be reopened.
Topology
Tasks
Star Technology has decided to establish connectivity with an ISP for accessing the Internet. In phase 1, the approach is to establish a dual-homed connection from HQ-R1 to ISP-R1 and ISP- R2. This will provide some degree of redundancy in the connectivity between HQ-R1 and ISP routers.
Based on network design, an autonomous system of Star Technology is 1, and AS of ISP is 2. A network Implementation Engineer has already initiated the configuration; trouble-shooting is required to find out and complete missing configurations. Moreover, configuration is to be established in a way that links between HQ-R1 and ISP-R1 can be used as the preferred path for reaching AS 2.
Below are tasks to be achieved to include the missing commands and complete the troubleshooting Task 1:
On HQ-R1, configure BGP for Autonomous System 1. Establish EBGP relationship with ISP-R1 and ISP-R2.
Notes:
After performing troubleshooting at HQ-R1, the following outcome should appear.
%BGP-5-ADJCHANGE: neighbor 192.168.12.2 Up
%BGP-5-ADJCHANGE: neighbor 192.168.13.2 Up
Task 2:
On HQ-R1, Advertise LBO interface as a prefix in BGR
Task 3:
On HQ-R1, configure the route map with the name loc. Set the local preference attribute as 900.
Task 4:
On HQ-R1, define the path between HQ-R1 - ISP-R1 as the preferred path for reaching AS 2.
Route map configured in task 3 to be used in the inbound direction.
正確答案:
Task 1: Configure BGP for AS 1 and Establish EBGP Peering with ISP-R1 and ISP-R2 To establish an EBGP relationship between HQ-R1 and ISP-R1/ISP-R2 on HQ-R1:
router bgp 1
neighbor 192.168.12.2 remote-as 2
neighbor 192.168.13.2 remote-as 2
router bgp 1: Enables BGP for AS 1 on HQ-R1.
neighbor <IP> remote-as 2: Establishes an EBGP session with the neighbors ISP-R1 (192.168.12.2) and ISP-R2 (192.168.13.2).
Task 2: Advertise Loopback0 Interface Prefix in BGP
To advertise the loopback interface (e.g., Loopback0) into BGP on HQ-R1:
router bgp 1
network <L0 IP> mask <L0 Subnet>
Example (assuming Loopback0 IP is 192.168.10.1/24):
router bgp 1
network 192.168.10.0 mask 255.255.255.0
The networkcommand specifies which prefix (L0) to advertise into BGP.
Task 3: Configure a Route Map Named locto Set Local Preference to 900
To set the local preference attribute to 900 using a route map on HQ-R1:
route-map loc permit 10
set local-preference 900
route-map loc permit 10: Creates a route map named loc.
set local-preference 900: Sets the local preference to 900, which influences route selection.
Task 4: Prefer the Path via ISP-R1 for Reaching AS 2
To prefer the link between HQ-R1 and ISP-R1 as the preferred path on HQ-R1:
router bgp 1
neighbor 192.168.12.2 route-map loc in
neighbor 192.168.12.2 route-map loc in: Applies the locroute map inbound on the session with ISP-R1 (192.168.12.2).
This sets the local preference to 900 for routes received from ISP-R1, making it the preferred path.
Verification Commands
Verify BGP Neighbors: show ip bgp summary
Expected output: Neighbors 192.168.12.2and 192.168.13.2should be Up.
Verify Advertised Routes: show ip bgp
Confirm the Loopback0 prefix is advertised.
Verify Local Preference: show ip bgp neighbors 192.168.12.2 received-routes
Check that the local preference is 900 for routes from ISP-R1.
Complete Configuration Summary on HQ-R1:
router bgp 1
neighbor 192.168.12.2 remote-as 2
neighbor 192.168.13.2 remote-as 2
network 192.168.10.0 mask 255.255.255.0
neighbor 192.168.12.2 route-map loc in
route-map loc permit 10
set local-preference 900
The local preference value of 900 ensures that routes from ISP-R1 are preferred over ISP-R2.
The Loopback0 prefix is successfully advertised into BGP.
The BGP sessions to ISP-R1 and ISP-R2 are established as required.
router bgp 1
neighbor 192.168.12.2 remote-as 2
neighbor 192.168.13.2 remote-as 2
router bgp 1: Enables BGP for AS 1 on HQ-R1.
neighbor <IP> remote-as 2: Establishes an EBGP session with the neighbors ISP-R1 (192.168.12.2) and ISP-R2 (192.168.13.2).
Task 2: Advertise Loopback0 Interface Prefix in BGP
To advertise the loopback interface (e.g., Loopback0) into BGP on HQ-R1:
router bgp 1
network <L0 IP> mask <L0 Subnet>
Example (assuming Loopback0 IP is 192.168.10.1/24):
router bgp 1
network 192.168.10.0 mask 255.255.255.0
The networkcommand specifies which prefix (L0) to advertise into BGP.
Task 3: Configure a Route Map Named locto Set Local Preference to 900
To set the local preference attribute to 900 using a route map on HQ-R1:
route-map loc permit 10
set local-preference 900
route-map loc permit 10: Creates a route map named loc.
set local-preference 900: Sets the local preference to 900, which influences route selection.
Task 4: Prefer the Path via ISP-R1 for Reaching AS 2
To prefer the link between HQ-R1 and ISP-R1 as the preferred path on HQ-R1:
router bgp 1
neighbor 192.168.12.2 route-map loc in
neighbor 192.168.12.2 route-map loc in: Applies the locroute map inbound on the session with ISP-R1 (192.168.12.2).
This sets the local preference to 900 for routes received from ISP-R1, making it the preferred path.
Verification Commands
Verify BGP Neighbors: show ip bgp summary
Expected output: Neighbors 192.168.12.2and 192.168.13.2should be Up.
Verify Advertised Routes: show ip bgp
Confirm the Loopback0 prefix is advertised.
Verify Local Preference: show ip bgp neighbors 192.168.12.2 received-routes
Check that the local preference is 900 for routes from ISP-R1.
Complete Configuration Summary on HQ-R1:
router bgp 1
neighbor 192.168.12.2 remote-as 2
neighbor 192.168.13.2 remote-as 2
network 192.168.10.0 mask 255.255.255.0
neighbor 192.168.12.2 route-map loc in
route-map loc permit 10
set local-preference 900
The local preference value of 900 ensures that routes from ISP-R1 are preferred over ISP-R2.
The Loopback0 prefix is successfully advertised into BGP.
The BGP sessions to ISP-R1 and ISP-R2 are established as required.
Which attribute is used to instruct the router that packets must be processed by an ASA that is associated with the segment?
正確答案: C
Which two differences should be considered when deciding whether to implement to implement routing policies or route maps? (Choose two.)
正確答案: A,E
Refer to the exhibit. Router R1 is expected to receive routes that originate from AS 65547 only.
However, R1 is receiving routes from AS 65547 and several other ASs that are directly attached to it. Which change to the AS path permit filter corrects the problem?
However, R1 is receiving routes from AS 65547 and several other ASs that are directly attached to it. Which change to the AS path permit filter corrects the problem?
正確答案: C
Refer to the exhibit. A network operator is configuring BGP PIC on CE1 on already established neighborships with PE1 and PE2 inside the fully converged MPLS network. Which element needs to be implemented to make this feature function effectively?
正確答案: D
A network engineer recently deployed a wireless network for users at a new office to join video conferences wirelessly. The existing network consists of routers that are configured for EIGRP and BGP. Which are located at several data centers in different physical locations. The engineer configured PIM-SSM within a single domain from a single source. However, during the testing phase, the video conference failed to work for any of the users. The IPs are reachable and firewalls in the network are configured correctly to allow the traffic.
Which action resolves the issue?
Which action resolves the issue?
正確答案: B
Refer to the exhibit. A network engineer has divided AS into confederations. Due to repeated ASN, when the 10.0 0.0/8 prefix from R1 arrives to R2, BGP automatically rejects it. What should the engineer do to fix the problem so that BGP allows that prefix on R2?
正確答案: B
說明：（僅 Fast2test 成員可見）
Refer to the exhibit. Multicast traffic destined from T1 and T2 routers to RP routers works well. A network engineer observes problems with multicast traffic flows between Site-A and Site-B. Site- A users fail to receive multicast stream on Site-B via RPTV site, while Site-B users fail to receive multicast stream on Site-A via RPTZ site. Which action must be implemented to resolve the issues?
正確答案: D
Refer to the exhibit. Company X is multihomed to a service provider. With the default settings, the link between PE2 and CE1 is the primary link, but company X has asked for the link between PE4 and CE2 to operate as the primary instead. A network engineer used a route map with local- preference to manipulate the routes from PE2 to CE1 to be less desirable and applied the route map on PE2 outbound to CE1. However, the path from PE2 to CE1 is still preferred.
Which action must the engineer take so that the desired path is chosen?
Which action must the engineer take so that the desired path is chosen?
正確答案: C