CCIE Routing & Switching Lab Workbook Version 4.0 Lab 20
IEWB-RS Lab 20
Difficulty Rating (10 highest): 8
Lab Overview:
The following scenario is a practice lab exam designed to test your skills at
configuring Cisco networking devices. Specifically, this scenario is designed to
assist you in your preparation for Cisco Systems CCIE Routing and Switching
Lab exam. However, remember that in addition to being designed as a
simulation of the actual CCIE lab exam, this practice lab should be used as a
learning tool. Instead of rushing through the lab in order to complete all the
configuration steps, take the time to research the networking technology in
question and gain a deeper understanding of the principles behind its operation.
Lab Instructions:
Prior to starting, ensure that the initial configuration scripts for this lab have been
applied. For a current copy of these scripts, see the Internetwork Expert
members site at http://members.internetworkexpert.com
Refer to the attached diagrams for interface and protocol assignments. Any
reference to X in an IP address refers to your rack number, while any reference
to Y in an IP address refers to your router number.
Upon completion, all devices should have full IP reachability to all networks in the
routing domain, including any networks generated by the backbone routers
unless explicitly specified.
Lab Do s and Don ts:
" Do not change or add any IP addresses from the initial configuration
unless otherwise specified
" Do not change any interface encapsulations unless otherwise specified
" Do not change the console, AUX, and VTY passwords or access methods
unless otherwise specified
" Do not use any static routes, default routes, default networks, or policy
routing unless otherwise specified
" Save your configurations often
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 20
Grading:
This practice lab consists of various sections totaling 100 points. A score of 80
points is required to achieve a passing score. A section must work 100% with the
requirements given in order to be awarded the points for that section. No partial
credit is awarded. If a section has multiple possible solutions, choose the solution
that best meets the requirements.
Grading for this practice lab is available when configured on Internetwork
Expert s racks, or the racks of Internetwork Expert s preferred vendors. See
Internetwork Expert s homepage at http://www.internetworkexpert.com for more
information.
Point Values:
The point values for each section are as follows:
Section Point Value
Bridging & Switching 14
Frame Relay 9
HDLC/PPP 3
Interior Gateway Routing 26
Exterior Gateway Routing 12
IP Multicast 5
IPv6 6
QoS 6
Security 6
System Management 8
IP Services 5
GOOD LUCK!
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 20
1. Bridging & Switching
1.1. Trunking
" Configure interfaces Fa0/19 & Fa0/21 on SW1 and SW3 as ISL trunk
links; these links should be bound together using LACP negotiation.
" Configure interfaces Fa0/19 - 21 on SW2 as 802.1q trunk links.
" Configure interface Fa0/20 on SW1 and SW3 as 802.1q trunk links.
" Do not use DTP to accomplish this.
2 Points
1.2. VLAN Assignments
" Configure the VTP domain 10 on SW4.
" Configure the VTP domain 789 on SW1, SW2, and SW3.
" SW2 and SW3 should learn about VLANs created on SW1 but should not
be able to modify them.
" Create and configure VLAN assignments per the diagram.
2 Points
1.3. Switch Management
" SW3 and SW4 have VLANs 89 and 107 configured for management
respectively.
" Configure these devices so that SW3 sends all IPv4 traffic to SW2.
" SW4 should send all IPv4 traffic to SW1.
1 Point
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1.4. Spanning-Tree Protocol
" Recently engineers in your network operations center have informed you
that your switches are experiencing very high CPU utilization. After further
investigation you have determined that too many resources are being
dedicating to running individual instances of spanning-tree protocol on a
per VLAN basis. To help reduce CPU utilization run three instances of
spanning-tree protocol to service all VLANs assigned throughout your
network.
" Configure your network so that VLANs 1, 5, 12, and 107 are mapped to
the first instance of STP.
" VLANs 27, 34, and 58 should be mapped to the second instance of STP.
" VLANs 46, 89, and 363 should be mapped to the last instance of STP.
" The name of this spanning-tree domain should be IESTP, and use a
revision number of 10.
3 Points
1.5. Spanning-Tree Protocol
" Configure SW4 as the root bridge for all STP instances.
" VLAN 27 traffic from SW1 to SW2 should be sent over the 802.1q trunk
link between SW1 and SW4; this configuration should be done on SW1.
3 Points
1.6. Spanning-Tree Protocol
" VLAN 363 traffic from SW2 to SW3 should use port Fa0/21.
" If port Fa0/21 is down it should use port Fa0/20.
" This configuration should be done on SW4.
3 Points
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2. Frame Relay
2.1. Full Mesh
" Using only physical interfaces configure a Frame Relay full mesh between
R3, R4, and R5.
" Use only the DLCIs specified in the diagram.
" Do not use Frame Relay Inverse-ARP.
3 Points
2.2. Bridging Over Frame Relay
" Recently a point-to-point T1 circuit has been provisioned between R1 and
R3 in order to migrate R1 off of the Frame Relay network. Additionally,
your provisioning department has put in an order for a new circuit to be
turned up between R2 and R3 over the Frame Relay cloud. In preparation
for this new setup in your network the design team has prematurely
changed your IP addressing scheme to fit the new point-to-point circuit
between R2 and R3. Unfortunately your change control policy dictates
that an IP address change on any non-host device in the network must go
through a long approval process. As a workaround in the meantime
configure R1 to provide transit services for this segment.
" Ensure that R1 will route out the T1 circuit to reach this network once IGP
connectivity has been established.
" Do not use the bridge irb command on R1 to accomplish this.
4 Points
2.3. Point-to-Point
" Configure a point-to-point Frame Relay circuit between R6 and BB1 per
the diagram.
" Use only the main interface on R6.
" Do not use Frame Relay Inverse-ARP.
2 Points
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3. HDLC/PPP
3.1. EAP
" Configure the Serial link between R1 and R3 using PPP encapsulation.
" Your company has decided to migrate away from Challenge Handshake
Authentication Protocol for all PPP links and implement the newer
Extensible Authentication Protocol. Management has requested for R1
and R3 s previous CHAP configuration be converted over to EAP.
" R1 and R3 s configuration related to CHAP is as follows:
R1:
username ROUTER3 password CISCO
!
interface Serial0/1
encapsulation ppp
ppp chap hostname ROUTER1
R3:
username ROUTER1 password CISCO
!
interface Serial0/1
encapsulation ppp
ppp authentication chap
ppp chap hostname ROUTER5
3 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 20
4. Interior Gateway Routing
4.1. OSPF
" Configure OSPF area 0 on the Ethernet segment between R5 and SW2.
" Since there can not possibly be any other neighbors on this segment R5
and SW2 should not elect a DR or BDR.
" Ensure the OSPF dead timers are set to 40 seconds on this segment but
do not use the ip ospf dead-interval or ip ospf hello-interval commands
to accomplish this.
" Configure OSPF area 5 in VLAN 5.
" Advertise the VLAN 89 the Loopback0 interface of SW2 into OSPF area 0.
3 Points
4.2. OSPF
" Configure OSPF area 345 on the Frame Relay cloud between R3, R4, and
R5.
" Advertise R3, R4, and R5 s Loopback 0 interfaces into OSPF area 345.
" One of your design engineers has expressed concerns about the ability of
OSPF to recover from a failure of a Frame Relay circuit between R3, R4,
and R5. This engineer has stated the following case:
o If R3 is the DR for the OSPF network and R4 loses connectivity to
the Frame Relay cloud through DLCI 413, it will no longer have
direct communication with R3. Therefore although it still has a
circuit up to R5, OSPF cannot properly communicate across the
network. This will also happen if R5 is the DR, and the circuit
between R3 & R5 or between R4 & R5 goes down.
" You comfort this engineer by informing him that you know a simple
solution to this problem since you attended Internetwork Expert s CCIE
Routing & Switching Advanced Technologies Class. Configure the OSPF
network to automatically recover from a failure of a single circuit across
the Frame Relay cloud.
3 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 20
4.3. OSPF
" Configure OSPF type 1 authentication on the Frame Relay network.
" Use the password of CISCO for this authentication.
" Do not use the area 345 authentication command to accomplish this
task.
2 Points
4.4. OSPF
" Configure OSPF type 2 authentication for all adjacencies in area 0.
" Use key number 1 and the password of CISCO.
" Do not use the area 0 authentication message-digest command to
accomplish this task.
2 Points
4.5. OSPF
" One of the design engineers has recommend that when R3 and R4
bootup that they should not used as transit routers until they have had
time to fully synchronize their OSPF databases.
" Configure R3 and R4 to advertise all OSPF routes with a maximum metric
for the first 10 minutes after they have booted up.
2 Points
4.6. OSPF
" One of your design engineers has reported to you that the both the CPU
utilization and the link utilization of routers connected to the Frame Relay
cloud is spiking roughly every 30 minutes. After explaining to this
engineer that this is OSPF s paranoid update , and is normal behavior, he
has recommended to the rest of the network team that OSPF be replaced
with static routes. Since you have attended Internetwork Expert s CCIE
Routing & Switching Advanced Technologies Class you once again inform
this engineer that there is a very simple solution to this problem.
" Configure your network to resolve this issue.
2 Points
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4.7. OSPF
" Configure OSPF area 345 on the Ethernet link between R3 and R4.
" Traffic from SW2 to VLAN 34 should use the Frame Relay circuit between
R4 and R5.
" This configuration should be performed on R5.
" Do not use the cost or bandwidth keywords to accomplish this.
3 Points
4.8. EIGRP
" Configure EIGRP AS 100 on R1, R2, R3, and SW1.
" Enable EIGRP on the PPP link between R1 and R3.
" Enable EIGRP on the Frame Relay network between R2 and R3.
" Enable EIGRP on the Ethernet segment between R2 and SW1.
" Enable EIGRP on VLAN 107 of SW1.
" Advertise the Loopback 0 interfaces of R1, R2, and SW1 with EIGRP.
" After a recent issue with EIGRP routes from your company s CCNA
practice lab leaking into the production network, you have decided to
authenticate all EIGRP adjacencies.
" Secure the EIGRP neighbor relationships between R2, R3, and SW1 with
the password CISCO.
3 Points
4.9. RIP
" Configure RIP on R3, R4, and R6.
" Enable RIP on VLANs 46 and 363.
" Advertise the Frame Relay link between R6 and BB1 into RIP.
" Your RIP enabled routers should not install any RIP routes from BB1 and
BB3.
" BB1 and BB3 should not install any RIP routes from your routers.
" Do not use the distribute-list keyword to accomplish this.
3 Points
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4.10. IGP Redistribution
" Redistribute between EIGRP, RIP, and OSPF on R3.
" Redistribute between RIP and OSPF on R4.
" R6 should use R3 to reach routes inside the EIGRP domain, and use R4
to reach routes inside the OSFP domain.
3 Points
5. Exterior Gateway Routing
5.1. BGP Peering
" Configure BGP on the following devices with the following AS numbers:
Device BGP AS
R1 200
R3 300
R4 300
R6 100
BB1 54
BB2 254
BB3 54
" Configure the BGP peering sessions as follows:
Device 1 Device 2
R1 R3
R1 BB2
R3 R4
R3 R6
R4 R6
R6 BB1
R6 BB3
" R1 and R3 should peer using their Loopback 0 interfaces.
" Secure the BGP session between R1 and BB2 using the password of
CISCO.
3 Points
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5.2. BGP Bestpath Selection
" Even though AS 300 is directly connected to AS 54, the fastest path to
reach it is out through AS 100 s OC3 link. In order to follow this
forwarding path, configure your network so that all traffic destined for
prefixes learned from AS 54 traverses the Ethernet segment between R4
and R6.
" In the case that the Ethernet segment between R4 and R6 is unavailable,
AS 300 should reroute to R6 by using Ethernet segment between R3 and
R6.
" Do not alter the weight, local-preference, or next-hop values of these
prefixes to accomplish this.
3 Points
5.3. BGP Filtering
" After failed negotiations between management groups AS 200 has now
refused to provide transport for AS 300 to reach AS 254.
" Configure AS 200 to reflect this policy, but do not use any outbound
filtering techniques or the community no-export.
" Ensure that R1 still has reachability to AS 254.
3 Points
5.4. BGP Redistribution
" To ensure that non BGP speaking devices have full connectivity your
design engineers have recommended that R3 and R4 redistribute their
BGP learned prefixes into IGP. You have voiced your concerns about
redistributing the full BGP table into IGP and have suggested instead that
R3 & R4 inject a default route. After further negotiations with the design
team, you have agreed to redistribute BGP into IGP, but only those
prefixes which are less than four autonomous systems away.
" Configure R3 and R4 to reflect this policy.
" To help safe guard this redistribution policy, configure R3 and R4 to reset
any BGP session that is sending more than 1000 prefixes.
3 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 20
6. IP Multicast
6.1. PIM
" Configure IP Multicast routing on R1, R3, and R4.
" Configure PIM sparse mode on the following interfaces:
Device Interface
R1 Fa0/0
R1 S0/1
R3 E0/0
R3 S1/2
R4 E0/0
R4 E0/1
" Configure R4 to announce its Loopback 0 interface as the RP for all
multicast groups.
" Do not use the ip pim autorp listener command to accomplish this.
3 Points
6.2. Multicast Testing
" Configure R1 s Ethernet interface to join multicast group 231.31.31.31.
" R3 and R4 should be able to successfully ping the multicast group
address joined by R1.
2 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 20
7. IPv6
7.1. IPv6 Addressing
" Enable IPv6 processing on R2 and R5.
" Configure IPv6 on VLAN 27 using the network 2002:8EXX:3502:0027::/64
where XX is your rack number.
" Configure IPv6 on VLAN 5 using the network 2002:8EXX:0505:0005::/64
where XX is your rack number.
3 Points
7.2. IPv6 Tunneling
" Hosts on VLANs 5 and 27 want to talk to each other via IPv6. Additionally
your design team has notified you that hosts on these segments will soon
be communicating with other IPv6 enabled hosts outside your network as
well. However, your current demand for IPv6 does not dictate that the
protocol should be enabled on every device throughout your transit
network.
" Configure your network in such a way that hosts on VLANs 5 and 27 can
communicate with each other, and so that they can communicate with an
arbitrary number of IPv6 enabled segments that are reachable via the
IPv4 network in the future.
3 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 20
8. QoS
8.1. IP TOS
" Prior to implementing a new QoS policy, you have been monitoring your
network for any packets that have the TOS byte set. You have noticed
that TCP packets sourced by the routers have the first two most significant
bits of the TOS byte set in the IP header. At first you thought these were
just BGP packets and were not really concerned, but after looking closer
you noticed that these were actually telnet packets. Since marking telnet
packets with the TOS of 0xC0 will conflict with your new QoS policy, you
have decided to have all routers set the TOS for telnet packets to 0x0.
Configure your network to reflect this policy.
2 Points
8.2. WRED
" Users on VLAN 27 have been complaining about slow access to the rest
of the network. After further investigation you have determined that the
output queue of R2 s Serial interface is full, and traffic attempting to enter
the queue is getting dropped.
" To help alleviate congestion configure R2 to selectively drop traffic on the
Serial interface before the output queue becomes full.
" Traffic with a higher DSCP value should be less likely to be dropped than
traffic with a lower value.
2 Points
8.3. Marking
" After implementing the new queueing strategy on R2 you have noticed
slow response time to your web server located on VLAN 27. Apparently
the web server service is not marking its TCP traffic with a DSCP value,
and is therefore less preferred over other traffic.
" To decrease response time to the server configure R2 so that traffic from
this server is least likely to be dropped as it is sent out to the Frame Relay
cloud.
" The server s address is 142.X.27.100.
2 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 20
9. Security
9.1. Traffic Filtering
" Recent traffic monitoring of your network has indicated that various hosts
from behind BB1 are performing port scans on your network. Configure
R6 so that these hosts are denied entry into your network. The IP
addresses of these hosts are as follows:
o 51.3.0.1
o 51.5.0.1
o 51.7.0.1
o 51.3.0.9
o 51.5.0.9
o 51.7.0.9
" Use the minimum amount of lines necessary to complete this task.
" Do not deny traffic from any other hosts.
3 Points
9.2. Reflexive Access-Lists
" The majority of these port scans were destined to hosts on VLAN 27. In
order to protect hosts on this segment in the future your security team has
asked you to implement a reflexive access-list on R2.
" Configure this access-list on R2 in such a way that hosts using TCP and
UDP based applications on VLAN 27 can access the rest of the network.
" Ensure that hosts outside VLAN 27 can access your web server, and that
you can ping and telnet to SW1 s SVI for management purposes.
3 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 20
10. System Management
10.1. SNMP
" Two new network management servers have been installed to manage
R5. Configure R5 for the following SNMP parameters:
o Contact: CCIE Lab R5
o Location: San Jose, CA US
" The first network management server s IP address is 142.X.5.100 and the
second network management server s IP address is 142.X.58.100.
" The network management servers are expecting the RO community string
to be CISCORO and the RW community to be CISCORW.
" SNMP traps should be sent with the community CISCOTRAP.
" Log any other device that tries to poll R5 via SNMP.
" To maintain consistency in monitoring R5 s interfaces ensure that the
ifIndex values do not change across reboots.
3 Points
10.2. SNMP
" After the installation of the two new network management servers, you
have noticed high CPU utilization related to the SNMP process on R5.
After further investigation it seems that the NOC is polling for R5 s routing
table and ARP table via SNMP.
" Disable the ability of R5 to be polled via SNMP for its routing table (ip.21)
and ARP table (ip.22).
" R5 should continue support for all other MIBs (iso).
3 Points
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10.3. IOS Image Management
" During a maintenance window the previous night you noticed that R3 had
to be reloaded three times to finally get it to recognize its flash memory.
This in turn caused R3 to try and boot a default IOS image via TFTP.
Since most of your companies networking infrastructure was purchased
off eBay you are not able to RMA the flash module with Cisco. Until you
can buy a new flash memory module off eBay configure R3 to boot a
default IOS image from R4 in the event that it can not locate its own image
in flash.
" Do not apply any configuration on R3 to accomplish this task.
2 Points
11. IP Services
11.1. Local Authorization
" You have opened a case with TAC to help troubleshoot an issue relating
to R4 crashing. TAC has requested access to R4 in order to help
troubleshoot the problem. Allow TAC to telnet into R4 using username
TAC and password CISCO.
" Since your corporate policy denies non-company personnel access to
your networking infrastructure, you have decided to only give TAC limited
access. When the TAC engineer telnets into R4 they should be placed
into privilege level 0 and given access to the following commands:
o show version
o show processes cpu
o show stack
o show memory
3 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 20
11.2. Telnet Filtering
" The TAC engineers will be telneting from the following IP addresses:
o 45.194.169.115
o 61.202.173.243
o 41.234.41.250
" Without regards to overlapping additional IP addresses use the most
efficient one line access-list to permit these three IP address to telnet into
R4.
2 Points
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