16.3.1 Packet Tracer – Troubleshoot Static and Default Routes – Instructions Answer

16.3.1 Packet Tracer – Troubleshoot Static and Default Routes (Instructor Version)

16.3.1 Packet Tracer – Troubleshoot Static and Default Routes

Addressing Table

Device Interface IP Addresses
R1 G0/0 172.31.1.1/25
2001:DB8:1::1/64
S0/0/0 172.31.1.194/30
2001:DB8:2::194/64
R2 G0/0 172.31.0.1/24
2001:DB8:3::1/64
S0/0/0 172.31.1.193/30
2001:DB8:2::193/64
S0/0/1 172.31.1.197/30
2001:DB8:4::197/64
R3 G0/0 172.31.1.129/26
2001:DB8:5::1/64
S0/0/1 172.31.1.198/30
2001:DB8:4::198/64
PC1 NIC 172.31.1.126/25
2001:DB8:1::126/64
PC2 NIC 172.31.0.254/24
2001:DB8:3::254/64
Server NIC 172.31.1.190/26
2001:DB8:5::190/64

Objectives

In this activity you will troubleshoot static and default routes and repair any errors that you find.

  • Troubleshoot IPv4 static routes.
  • Troubleshoot IPv4 default routes.
  • Troubleshoot IPv6 static routes.
  • Configure IPv4 static routes.
  • Configure IPv4 default routes.
  • Configure IPv6 static routes.

Background / Scenario

A newly hired network technician is attempting to preconfigure a simple topology that will be delivered to a customer. The technician has not been able to establish connectivity between the three LANs. You have been asked to troubleshoot the topology and verify connectivity between the hosts on the three LANs over IPv4 and IPv6.

Instructions

Step 1: Locate and document the problems.

Review the routing table on R1, R2, R3.
[tabs]
[tab title=”Router R1″]

R1#show ip route 
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is 172.31.1.195 to network 0.0.0.0

     172.31.0.0/16 is variably subnetted, 4 subnets, 3 masks
C       172.31.1.0/25 is directly connected, GigabitEthernet0/0
L       172.31.1.1/32 is directly connected, GigabitEthernet0/0
C       172.31.1.192/30 is directly connected, Serial0/0/0
L       172.31.1.194/32 is directly connected, Serial0/0/0
S*   0.0.0.0/0 [1/0] via 172.31.1.195

R1#
R1#show ipv6 route 
IPv6 Routing Table - 8 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
       U - Per-user Static route, M - MIPv6
       I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
       ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect
       O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
       D - EIGRP, EX - EIGRP external
C   2001:DB8:1::/64 [0/0]
     via GigabitEthernet0/0, directly connected
L   2001:DB8:1::1/128 [0/0]
     via GigabitEthernet0/0, receive
C   2001:DB8:2::/64 [0/0]
     via Serial0/0/0, directly connected
L   2001:DB8:2::194/128 [0/0]
     via Serial0/0/0, receive
S   2001:DB8:3::/64 [1/0]
     via Serial0/0/0, directly connected
S   2001:DB8:4::/64 [1/0]
     via Serial0/0/0, directly connected
S   2001:DB8:5::/64 [1/0]
     via Serial0/0/0, directly connected
L   FF00::/8 [0/0]
     via Null0, receive
R1#

[/tab]
[tab title=”Router R2″]

R2#show ip route 
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     172.31.0.0/16 is variably subnetted, 8 subnets, 5 masks
C       172.31.0.0/24 is directly connected, GigabitEthernet0/0
L       172.31.0.1/32 is directly connected, GigabitEthernet0/0
S       172.31.1.0/25 [1/0] via 172.31.1.198
S       172.31.1.128/26 [1/0] via 172.31.1.194
C       172.31.1.192/30 is directly connected, Serial0/0/0
L       172.31.1.193/32 is directly connected, Serial0/0/0
C       172.31.1.196/30 is directly connected, Serial0/0/1
L       172.31.1.197/32 is directly connected, Serial0/0/1

R2#show ipv6 route 
IPv6 Routing Table - 9 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
       U - Per-user Static route, M - MIPv6
       I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
       ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect
       O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
       D - EIGRP, EX - EIGRP external
S   2001:DB6:1::/64 [1/0]
     via 2001:DB8:2::194
C   2001:DB8:2::/64 [0/0]
     via Serial0/0/0, directly connected
L   2001:DB8:2::193/128 [0/0]
     via Serial0/0/0, receive
C   2001:DB8:3::/64 [0/0]
     via GigabitEthernet0/0, directly connected
L   2001:DB8:3::1/128 [0/0]
     via GigabitEthernet0/0, receive
C   2001:DB8:4::/64 [0/0]
     via Serial0/0/1, directly connected
L   2001:DB8:4::197/128 [0/0]
     via Serial0/0/1, receive
S   2001:DB8:5::/64 [1/0]
     via 2001:DB8:4::198
L   FF00::/8 [0/0]
     via Null0, receive
R2#

[/tab]
[tab title=”Router R3″]

R3#show ip route 
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     172.31.0.0/16 is variably subnetted, 7 subnets, 5 masks
S       172.31.0.0/24 is directly connected, Serial0/0/1
S       172.31.1.0/28 is directly connected, Serial0/0/1
C       172.31.1.128/26 is directly connected, GigabitEthernet0/0
L       172.31.1.129/32 is directly connected, GigabitEthernet0/0
S       172.31.1.192/30 is directly connected, Serial0/0/1
C       172.31.1.196/30 is directly connected, Serial0/0/1
L       172.31.1.198/32 is directly connected, Serial0/0/1

R3#show ipv6 route 
IPv6 Routing Table - 7 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
       U - Per-user Static route, M - MIPv6
       I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
       ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect
       O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
       D - EIGRP, EX - EIGRP external
S   2001:DB8:2::/64 [1/0]
     via Serial0/0/1, directly connected
S   2001:DB8:3::/64 [1/0]
     via Serial0/0/1, directly connected
C   2001:DB8:4::/64 [0/0]
     via Serial0/0/1, directly connected
L   2001:DB8:4::198/128 [0/0]
     via Serial0/0/1, receive
C   2001:DB8:5::/64 [0/0]
     via GigabitEthernet0/0, directly connected
L   2001:DB8:5::1/128 [0/0]
     via GigabitEthernet0/0, receive
L   FF00::/8 [0/0]
     via Null0, receive
R3#

[/tab]
[/tabs]

Record your findings in a table like the one below.

Location Problem Solution
R1 IPv4 Default route next hop interface address is incorrect. Change next hop address to 172.31.1.193
R2 IPv6 route to LAN 1 has the wrong network address for the destination network. Change destination address from 2001:DB6:1::/64 to 2001:DB8:1::/64
R2 The next hop addresses in the two IPv4 routes are reversed. Change the statements to ip route 172.31.1.0 255.255.255.128 172.31.1.194 and ip route 172.31.1.128 255.255.255.192 172.31.1.198
R3 The IPv6 route to LAN 1 is missing. Configure a directly connected static route to 2001:DB8:1::/64
R3 The IPv4 route to LAN 1 has the wrong mask for the network. Change the mask to 255.255.255.128

Step 2: Repair the problems.

Configure the devices so that full connectivity exists between the hosts on the LANs over IPv4 and IPv6.

Note: Your task is to establish connectivity using the existing static route design. Changing the types of static routes used will result in a loss of points.

Answer Configurations

Router R1

enable
conf t
no ip route 0.0.0.0 0.0.0.0 172.31.1.195
ip route 0.0.0.0 0.0.0.0 172.31.1.193
end

Router R2

enable
conf t
no ip route 172.31.1.0 255.255.255.128 172.31.1.198
no ip route 172.31.1.128 255.255.255.192 172.31.1.194
ip route 172.31.1.0 255.255.255.128 172.31.1.194
ip route 172.31.1.128 255.255.255.192 172.31.1.198
no ipv6 route 2001:DB6:1::/64 2001:DB8:2::194
ipv6 route 2001:DB8:1::/64 2001:DB8:2::194
end

Router R3

enable
conf t
no ip route 172.31.1.0 255.255.255.240 Serial0/0/1
ip route 172.31.1.0 255.255.255.128 Serial0/0/1
ipv6 route 2001:DB8:1::/64 Serial0/0/1
end

Download PDF & PKA file Answers:

[sociallocker id=”54558″]
[wpdm_package id=’39229′]
[wpdm_package id=’39230′]
[/sociallocker]

[alert-note][one_half]

Previous Lab
15.6.1 Packet Tracer – Configure IPv4 and IPv6 Static and Default Routes

[/one_half][one_half_last]
[/one_half_last][/alert-note]

Subscribe
Notify of
guest
0 Comments
Inline Feedbacks
View all comments