Cisco 300-135 ExamTSHOOT Troubleshooting and Maintaining Cisco IP Networks

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Q1. - (Topic 14) 

The implementations group has been using the test bed to do a ‘proof-of-concept' that requires both Client 1 and Client 2 to access the WEB Server at 209.65.200.241. After several changes to the network addressing, routing scheme, DHCP services, NTP services, layer 2 connectivity, FHRP services, and device security, a trouble ticket has been opened indicating that Client 1 cannot ping the 209.65.200.241 address. 

Use the supported commands to isolated the cause of this fault and answer the following questions. 

On which device is the fault condition located? 

A. R1 

B. R2 

C. R3 

D. R4 

E. DSW1 

F. DSW2 

G. ASW1 

H. ASW2 

Answer:

Explanation: 

The EIGRP AS number configured on R4 is wrong. 


Q2. - (Topic 1)

Which IPsec mode will encrypt a GRE tunnel to provide multiprotocol support and reduced overhead?

A. 3DES

B. multipoint GRE

C. tunnel

D. transport

Answer: D


Q3. - (Topic 9) 

The implementations group has been using the test bed to do a ‘proof-of-concept' that requires both Client 1 and Client 2 to access the WEB Server at 209.65.200.241. After several changes to the network addressing, routing scheme, DHCP services, NTP services, layer 2 connectivity, FHRP services, and device security, a trouble ticket has been opened indicating that Client 1 cannot ping the 209.65.200.241 address. 

Use the supported commands to isolated the cause of this fault and answer the following questions. 

The fault condition is related to which technology? 

A. BGP 

B. NTP 

C. IP NAT 

D. IPv4 OSPF Routing 

E. IPv4 OSPF Redistribution 

F. IPv6 OSPF Routing 

G. IPv4 layer 3 security 

Answer: A Explanation: 

On R1 under router the BGP process Change neighbor 209.56.200.226 remote-as 65002 statement to neighbor 209.65.200.226 remote-as 65002 


Q4. - (Topic 13) 

The implementations group has been using the test bed to do a ‘proof-of-concept' that requires both Client 1 and Client 2 to access the WEB Server at 209.65.200.241. After several changes to the network addressing, routing scheme, DHCP services, NTP services, layer 2 connectivity, FHRP services, and device security, a trouble ticket has been opened indicating that Client 1 cannot ping the 209.65.200.241 address. 

Use the supported commands to isolated the cause of this fault and answer the following questions. 

Which is the solution to the fault condition? 

A. Under the EIGRP process, delete the redistribute ospf 1 route-map OSPF_ to_ EIGRP command and enter the redistribute ospf 1 route-map OSPF - > EIGRP command. 

B. Under the EIGRP process, delete the redistribute ospf 1 route-map OSPF_ to_ EIGRP command and enter the redistribute ospf 6 metric route-map OSPF - > EIGRP command. 

C. Under the OSPF process, delete the redistribute eigrp10 subnets route-map EIGPR ->OSPF command and enter the redistribute eigrp10 subnets route-map OSPF - > EIGRP command. 

D. Under the OSPF process, delete the redistribute eigrp10 subnets route-map EIGPR ->OSPF command and enter the redistribute eigrp10 subnets route-map EIGPR - > OSPF command. 

E. Under the EIGRP process, delete the redistribute ospf 1 route-map OSPF _to_ EIGRP command and enter redistribute ospf 1 metric 100000 100 100 1 15000 route_ map OSPF _to _EIGRP command 

Answer:

Explanation: 

On R4, in the redistribution of EIGRP routing protocol, we need to change name of route-map to resolve the issue. It references route-map OSPF_to_EIGRP but the actual route map is called OSPF->EIGRP. 

Topic 14, Ticket 9 : EIGRP AS number 

Topology Overview (Actual Troubleshooting lab design is for below network design) 

. Client Should have IP 10.2.1.3 

. EIGRP 100 is running between switch DSW1 & DSW2 

. OSPF (Process ID 1) is running between R1, R2, R3, R4 

. Network of OSPF is redistributed in EIGRP 

. BGP 65001 is configured on R1 with Webserver cloud AS 65002 

. HSRP is running between DSW1 & DSW2 Switches 

The company has created the test bed shown in the layer 2 and layer 3 topology exhibits. 

This network consists of four routers, two layer 3 switches and two layer 2 switches. 

In the IPv4 layer 3 topology, R1, R2, R3, and R4 are running OSPF with an OSPF process number 1. 

DSW1, DSW2 and R4 are running EIGRP with an AS of 10. Redistribution is enabled where necessary. 

R1 is running a BGP AS with a number of 65001. This AS has an eBGP connection to AS 65002 in the ISP's network. Because the company's address space is in the private range. 

R1 is also providing NAT translations between the inside (10.1.0.0/16 & 10.2.0.0/16) networks and outside (209.65.0.0/24) network. 

ASW1 and ASW2 are layer 2 switches. 

NTP is enabled on all devices with 209.65.200.226 serving as the master clock source. 

The client workstations receive their IP address and default gateway via R4's DHCP server. 

The default gateway address of 10.2.1.254 is the IP address of HSRP group 10 which is running on DSW1 and DSW2. 

In the IPv6 layer 3 topology R1, R2, and R3 are running OSPFv3 with an OSPF process number 6. 

DSW1, DSW2 and R4 are running RIPng process name RIP_ZONE. 

The two IPv6 routing domains, OSPF 6 and RIPng are connected via GRE tunnel running over the underlying IPv4 OSPF domain. Redistrution is enabled where necessary. 

Recently the implementation group has been using the test bed to do a ‘proof-of-concept' on several implementations. This involved changing the configuration on one or more of the devices. You will be presented with a series of trouble tickets related to issues introduced during these configurations. 

Note: Although trouble tickets have many similar fault indications, each ticket has its own issue and solution. 

Each ticket has 3 sub questions that need to be answered & topology remains same. 

Question-1 Fault is found on which device, 

Question-2 Fault condition is related to, 

Question-3 What exact problem is seen & what needs to be done for solution 

Client is unable to ping IP 209.65.200.241 

Solution 

Steps need to follow as below:-

. When we check on client 1 & Client 2 desktop we are not receiving DHCP address from R4 

ipconfig ----- Client will be receiving IP address 10.2.1.3 

. From Client PC we can ping 10.2.1.254 

. But IP 10.2.1.3 is not able to ping from R4, R3, R2, R1 . 

. This clearly shows problem at R4 Kindly check routes in EIGRP there are no routes of eigrp. 

. Check the neighborship of EIGRP on R4; there are no neighbor seen from DSW1 & DSW2 check the running config of EIGRP protocol it shows EIGRP AS 1 process…. Now check on DSW1 & DSW2 

On DSW1 only one Eigrp neighbour is there with DSW2 but its not with R4… 

. From above snapshot & since R4 has EIGRP AS number 1 due to which neighbour is not happening. 

. Change required: On R4, IPV4 EIGRP Routing, need to change the EIGRP AS number from 1 to 10 since DSW1 & DSW2 is configured to be in EIGRP AS number 10. 


Q5. - (Topic 5) 

Scenario: A customer network engineer has edited their OSPF network configuration and now your customer is experiencing network issues. They have contacted you to resolve the issues and return the network to full functionality. 

The 6.6.0.0 subnets are not reachable from R4. how should the problem be resolved? 

A. Edit access-list 46 in R6 to permit all the 6.6.0.0 subnets 

B. Apply access-list 46 in R6 to a different interface 

C. Apply access-list 1 as a distribute-list out under router ospf 100 in R4 

D. Remove distribute-list 64 out on R6 E. Remove distribute-list 1 in ethernet 0/1 in R4 

F. Remove distribute-list 1 in ethernet 0/0 in R4 

Answer:

Explanation: 

Here we see from the running configuration of R6 that distribute list 64 is being used in the outbound direction to all OSPF neighbors. 

However, no packets will match the 6.6.0.0 in this access list because the first line blocks all 6.0.0.0 networks, and since the 6.6.0.0 networks will also match the first line of this ACL, these OSPF networks will not be advertised because they are first denied in the first line of the ACL. 


Q6. - (Topic 4) 

Scenario: 

You have been asked by your customer to help resolve issues in their routed network. Their network engineer has deployed HSRP. On closer inspection HSRP doesn't appear to be operating properly and it appears there are other network problems as well. You are to provide solutions to all the network problems. 

Examine the configuration on R5. Router R5 do not see any route entries learned from R4; what could be the issue? 

A. HSRP issue between R5 and R4 

B. There is an OSPF issue between R5and R4 

C. There is a DHCP issue between R5 and R4 

D. The distribute-list configured on R5 is blocking route entries 

E. The ACL configured on R5 is blocking traffic for the subnets advertised from R4. 

Answer:

Explanation: 

If we issue the "show ip route" and "show ip ospf neighbor" commands on R5, we see that there are no learned OSPF routes and he has no OSPF neighbors. 


Q7. - (Topic 2) 

A customer network engineer has made configuration changes that have resulted in some loss of connectivity. You have been called in to evaluate a switch network and suggest resolutions to the problems. 

Refer to the topology. 

SW1 Switch Management IP address is not pingable from SW4. What could be the issue? 

A. Management VLAN not allowed in the trunk links between SW1 and SW4 

B. Management VLAN not allowed in the trunk links between SW1 and SW2 

C. Management VLAN not allowed in the trunk link between SW2 and SW4 

D. Management VLAN ip address on SW4 is configured in wrong subnet 

E. Management VLAN interface is shutdown on SW4 

Answer:

Explanation: 

In the network, VLAN 300 is called the Management VLAN. Based on the configurations shown below, SW1 has VLAN 300 configured with the IP address of 192.168.10.1/24, while on SW4 VLAN 300 has an IP address of 192.168.100.4/24, which is not in the same subnet. 


Q8. - (Topic 11) 

The implementations group has been using the test bed to do a ‘proof-of-concept' that requires both Client 1 and Client 2 to access the WEB Server at 209.65.200.241. After several changes to the network addressing, routing scheme, DHCP services, NTP services, layer 2 connectivity, FHRP services, and device security, a trouble ticket has been opened indicating that Client 1 cannot ping the 209.65.200.241 address. 

Use the supported commands to isolated the cause of this fault and answer the following questions. 

On which device is the fault condition located? 

A. R1 

B. R2 

C. R3 

D. R4 

E. DSW1 

F. DSW2 

G. ASW1 

Answer:

Explanation: 

On R1, we need to permit IP 209.65.200.222/30 under the access list. 


Q9. - (Topic 4) 

Scenario: 

You have been asked by your customer to help resolve issues in their routed network. Their network engineer has deployed HSRP. On closer inspection HSRP doesn't appear to be operating properly and it appears there are other network problems as well. You are to provide solutions to all the network problems. 

You have received notification from network monitoring system that link between R1 and R5 is down and you noticed that the active router for HSRP group 1 has not failed over to the standby router for group 1. You are required to troubleshoot and identify the issue. 

A. There is an HSRP group track command misconfiguration 

B. There is an HSRP group priority misconfiguration 

C. There is an HSRP authentication misconfiguration 

D. There is an HSRP group number mismatch 

E. This is not an HSRP issue; this is routing issue. 

Answer:

Explanation: 

When looking at the HSRP configuration of R1, we see that tracking has been enabled, but that it is not tracking the link to R5, only the link to R2: 

R1 should be tracking the Eth 0/1 link, not 0/0 to achieve the desired affect/ 


Q10. - (Topic 19) 

The implementation group has been using the test bed to do an IPv6 'proof-of-concept1. After several changes to the network addressing and routing schemes, a trouble ticket has been opened indicating that the loopback address on R1 (2026::111:1) is not able to ping the loopback address on DSW2 (2026::102:1).

Use the supported commands to isolate the cause of this fault and answer the following question.

The fault condition is related to which technology?

A. NTP

B. IPv4 OSPF Routing

C. IPv6 OSPF Routing

D. IPv4 layer 3 security

Answer: C

Explanation:

Since we are unable to ping the IPv6 address, the problem is with IPv6 OSPF Routing.


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