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Summative Assessment – Internetworking
Practical Assessment: Section 1
Scenario:
A company has a regional office and two branch offices. The regional office is Dundee the branches are Edinburgh and Glasgow respectively. The topology is detailed below:
You are required to set up the network shown above.
Router 0 – Dundee, Router 1 – Edinburgh, Router 2 – Glasgow
Details concerning the network:
The Dundee router provides various services the branch routers can access. The E0 interface is configured for Network Address Translation to protect the internal hosts. These reside on the 10.10.0.0 private A class address space. The outside IP address for this network is 200.100.100.0 /24. The link between Dundee and Edinburgh is a frame relay network with DLCI number 10. The link between Edinburgh and Glasgow is a 64kbps serial line with PPP encapsulation applied.
All S0 interfaces are DCE with a bandwidth of 64000bps and a clock rate of 64000.
Dundee provides DHCP services on a server attached to E0.
Section 1 (Part A): Configure serial links
This section covers Outcome 6, task 6.1 Configure Basic Frame Relay and Outcome 3, task 3.1 Implement point to point link. All Elements must be completed in order to obtain a pass.
The company decides implement link a frame relay link between Edinburgh and Dundee. The link should use IETF frame relay encapsulation. They have been assigned a DLCI number of 100. Configure the network for frame relay with a clock rate of 64000 and a bandwidth of 64kbps. A static map should be configured on Edinburgh mapping the IP address of Dundee S0/0 to DLCI 101. Similarly, a static map should be configured on Dundee mapping DLCI 101 to Edinburgh S1 interface. LMI type should be ANSI on both routers.
3.1 Implement a serial point to point link: Use this section to record the tasks carried out to implement a serial point to point link.
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Task |
Description of Activity |
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1. Cable Dundee to Edinburgh |
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2. Cable Edinburgh to Glasgow |
6.1 Configure Basic Frame Relay: Use this section to record the tasks carried out to configure a basic frame relay link.
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1. Configure the appropriate Dundee interface for frame relay encapsulation IETF |
Dundee(config)#int se 0/1/0 Dundee(config-if)# ip add 10.10.0.1 255.255.0.0 Dundee(config-if)#clock rate 64000 Dundee(config-if)#no shut Dundee(config-if)#int se0/1/0 Dundee(config-if)#encapsulation frame-relay ietf |
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2. Configure the appropriate Edinburgh interface for frame relay encapsulation IETF |
Router> Router>en Router>enable Router#config t Router#config terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#hostaname edinburgh edinburgh(config-if)# ip add 10.10.1.2 255.255.0.0 edinburgh(config-if)#no shut |
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3. Configure static DLCI map on Edinburgh |
edinburgh(config)# int se0/1/0 edinburgh(config-if)#frame-relay map ip 10.10.0.1 101 broadcast edinburgh(config-if)# |
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4. Configure static DLCI map on Dundee |
Dundee(config-if)#int se0/1/0
Dundee(config-if)#frame-relay map ip 10.10.1.2 101 broadcast Dundee(config-if)# |
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5. Turn off keep-alives on both routers |
edinburgh(config)#int se0/1/0 edinburgh(config)#no keepalive edinburgh(config)#no shut edinburgh(config)# |
3.2 Configure PPP authentication: Use this section to record the tasks carried out to configure PPP authentication on a serial link.
This section covers Outcome 3, tasks 3.2 and 3.3. All Elements must be completed in order to obtain a pass.
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1. Configure the Edinburgh to Glasgow interface for PPP |
edinburgh#enable edinburgh#config t edinburgh#config terminal Enter configuration commands, one per line. End with CNTL/Z. edinburgh(config-if)#encapsulation ppp %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0, changed state to down edinburgh(config-if)# %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0, changed state to u |
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2. Configure the Glasgow to Edinburgh interface for PPP |
Glasgow(config-if)#int se0/1/0 Glasgow(config-if)#encapsulation ppp Glasgow(config-if)# Glasgow(config-if)# %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0, changed state to up |
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3. Configure username and password on Edinburgh |
edinburgh(config-if)#ppp authentication pap %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0, changed state to down edinburgh(config-if)#Username Glasgow password pass edinburgh(config)# |
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4. Configure username and password on Glasgow |
Glasgow(config-if)#ppp authentication pap Glasgow(config-if)#Username Glasgow password pass Glasgow(config)# Username edinburgh password paa Glasgow(config)# Glasgow(config)# |
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5. How would you configure PPP authentication PAP on both routers |
For PAP authentication, you can specify the username and password that the local router will send to the remote router for authentication using the following command, Router(config-if)#ppp pap sent-username USER passwrod PASS |
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6. How would you remove PPP authentication PAP on both routers |
Glasgow(config-if)#disable ppp |
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7. Configure PPP authentication CHAP on both routers |
edinburgh(config)#int se0/1/0 edinburgh(config-if)#encapsulation ppp edinburgh(config-if)#ppp authentication chap edinburgh(config-if)#ppp chap hostname glasgow |
Section 1 (Part B): Configure serial link
In order to ensure the PPP link functions correctly to pass traffic between the Edinburgh, Glasgow and ISP routers, the company has decided to implement a routing protocol between the branch offices in Edinburgh and Glasgow. They have decided this will be EIGRP within AS 101. EIGRP should pass details of the following networks only: Edinburgh E0, Glasgow E0, and the network between Edinburgh and Glasgow. A default route should be configured on the Edinburgh router indicating a route exists for default traffic to Dundee. This should be propagated via EIGRP to Glasgow.
Configure EIGRP routing between Edinburgh and Glasgow: Use this section to record the tasks carried out to configure EIRGP routing and propagate the routes throughout the network.
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1. Configure EIGRP routing with AS 101 on Edinburgh |
edinburgh#en edinburgh#enable edinburgh(config)#router eigrp 101 edinburgh(config-router)# |
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2. Configure EIGRP routing with AS 101 on Glasgow |
Glasgow>en Glasgow>enable Glasgow#config t Enter configuration commands, one per line. End with CNTL/Z. Glasgow(config)#router eigrp 101 Glasgow(config-router)# |
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3. Configure static route to Dundee on Edinburgh router |
edinburgh>en edinburgh>enable edinburgh#config t edinburgh(config)#ip route 172.16.20.0 255.255.255.0 se0/1/0 edinburgh(config)# |
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4. Propagate static route from Edinburgh to Glasgow via EIGRP |
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5. Verify operation of EIGRP |
