Section 5: IP and IOS Features (10 Points)


  • Configure R6 to provide DHCP service to clients located on VLAN 22. Consider the following information:

- Bindings are stored on Host 160.10.22.253, the file transfer protocol is FTP and the server should wait 4 minutes before writing database changes.

- Username: user

- Password: password

- Filename: router-dhcp

- DNS servers: 160.10.22.100 and 160.10.22.101

- Default routers: 160.10.22.3 and 160.10.22.5

- Domain name: mycompany.com

- Hosts most retain the DHCP assignment for one week.

If you configured this correctly as shown in Example 4-33, you have scored 4 points.

The DHCP feature is very useful and many companies use it. Here you have a concept of a host that stores the DHCP bindings. Notice which commands in Example 4-33 are relevant to accomplish this task.

Example 4-33. R6 DHCP Configuration
 R6#show run | b dhcp ip dhcp database ftp://user:password@160.10.22.253/router-dhcp write-delay 240 ip dhcp excluded-address 160.10.22.3 160.10.22.6 ! ip dhcp pool VLAN_22    network 160.10.22.0 255.255.255.0    dns-server 160.10.22.100 160.10.22.101    default-router 160.10.22.3 160.10.22.5    domain-name mycompany.com    lease 7 

  • You have some users on VLAN_25 that must have R1 configured as their default gateway; other users must have R5 as their default gateway. Configure R1 and R5 not to send redirect messages to the originator PC.

If you configured this correctly as shown in Example 4-34, you have scored 2 points.

The ip redirects command allows the interface to redirect incoming packets to a better path. Disabling the feature with no ip redirects forces the interfaces to accept the packet and to not redirect it.

Example 4-34. R5 Disabling the ICMP Redirect Feature
 R1#show run int e0/1 Building configuration... Current configuration : 97 bytes ! interface Ethernet0/1  ip address 160.10.25.1 255.255.255.0  no ip redirects  half-duplex end R1# ! ! ________________________________________________________________ R5#show run int fa0/1 Building configuration... Current configuration : 113 bytes ! interface FastEthernet0/1  ip address 160.10.25.5 255.255.255.0  no ip redirects  duplex auto  speed auto end R5# 

  • The BB2 router is reporting some problems and it is not stable. Configure R4 to save a core dump via FTP in case BB2 fails or crashes. Consider the FTP username CISCO, password CCIE, FTP server IP address 140.200.10.200, and filename dumpfile. Use passive mode also.

If you configured this correctly as shown in Example 4-35, you have scored 2 points.

In Example 4-35, you have the necessary configuration to accomplish this task. Notice that the requirement to use "passive mode" will not require any configuration, because it is the default mode and will not show in your configuration.

Example 4-35. R4 Configuration to Get via FTP a Core Dump
 R4#show run Building configuration... Current configuration : 97 bytes ! ! ip ftp source-interface Ethernet0/0 ip ftp username CISCO ip ftp password CCIE ! ! exception protocol ftp exception dump 140.200.10.200 exception core-file dumpfile ! R4# 

  • You have some security concerns regarding the use of BOOTP services on R2. Disable the BOOTP services on this router.

If you configured this correctly as shown in Example 4-36, you have scored 2 points.

Example 4-36. R2 Disabling BOOTP Services Configuration
 R2#show run | i bootp no ip bootp server R2# 




CCIE Routing and Switching Practice Labs
CCIE Routing and Switching Practice Labs
ISBN: 1587051478
EAN: 2147483647
Year: 2006
Pages: 268

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