CCIE Routing & Switching Lab Workbook Version 4.0 Lab 15
IEWB-RS Lab 15
Difficulty Rating (10 highest): 9
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 15
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 12
WAN Technologies 10
Interior Gateway Routing 21
Exterior Gateway Routing 9
IP Multicast 8
IPv6 11
QoS 6
Security 6
System Management 9
IP Services 8
GOOD LUCK!
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 15
1. Bridging & Switching
1.1. VLAN Assignments
" Configure the VTP domain CISCO between SW1, SW2, and SW3.
" SW2 should be the VTP server and SW1 & SW3 its clients.
" Configure the VTP domain IE on SW4.
" Create and configure the VLAN assignments as follows:
Catalyst Port Interface VLAN
SW1 Fa0/1 R1 - Fa0/0 17
SW1 Fa0/3 R3 - E0/0 3
SW1 Fa0/5 R5 - E0/0 Trunk
SW1 Fa0/10 N/A 5
SW1 Fa0/11 N/A 5
SW1 Fa0/20 SW4 Fa0/14 Trunk
SW1 VLAN 17 17
SW2 Fa0/2 R2 - Fa0/0 26
SW2 Fa0/6 R6 - G0/0 6
SW2 Fa0/10 N/A 8
SW2 Fa0/11 N/A 8
SW2 Fa0/14 SW1 Fa0/14 Routed
SW2 Fa0/16 SW3 Fa0/16 Trunk
SW2 Fa0/19 SW4 Fa0/19 Trunk
SW2 Fa0/24 BB2 52
SW2 VLAN 8 8
SW3 Fa0/3 R3 - E0/1 33
SW3 Fa0/16 SW2 Fa0/16 Trunk
SW3 Fa0/24 BB3 37
SW4 Fa0/6 R6 - G0/1 26
SW4 Fa0/15 SW1 Fa0/21 37
SW4 Fa0/14 SW2 Fa0/20 Trunk
SW4 Fa0/19 SW2 Fa0/19 Trunk
" Use dot1q encapsulation for the trunk links.
2 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 15
1.2. Trunking
" Frames sent into the layer 2 domain from R4 s interface E0/0 should use
Tag Protocol Identifier of 0x8100 and a VLAN ID of 54; frames sent from
E0/1 should the same TPID but use a VLAN ID of 45.
" As these frames are received by the layer 2 domain an additional metro
tag of 245 and 254 should be added respectively, and the frames should
be delivered to interfaces E0/1.45 and E0/1.54 on R5.
3 Points
1.3. EtherChannel
" Configure interfaces Fa0/17 & Fa0/18 on SW2 and SW3 to be bound
together as one logical layer 3 link per the diagram.
" This link should be negotiated using Link Aggregation Control Protocol.
2 Points
1.4. Spanning-Tree Protocol
" Your network administrator has informed you that DHCP requests sent by
users in VLAN 5 have been timing out. After further investigation you
have determined that spanning-tree protocol's forwarding delay is to
blame. Since VLAN 5 is only contained to SW1 your design team has
deemed it unnecessary to run spanning-tree protocol in this VLAN.
" Configure your network to reflect this policy.
2 Points
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1.5. Access-List Maintenance
" Your NOC engineers have been noticing minor outages that seem to
coincide with the security team updating ACLs on SW1. You have
informed these engineers that the switch is temporarily blocking traffic
through the port that the ACL is being updated on. Although this is a
normal and desirable case, they have requested that this behavior be
disabled.
" Configure SW1 to meet this requirement.
1 Point
1.6. Bandwidth Limiting
" Network monitoring has indicated that BB3 is generating an unusually
large amount of broadcast traffic on the link to SW3.
" While the problem is investigated configure SW3 to only allow 750Kbps of
broadcast traffic inbound from BB3.
" BB3 will be connecting using 10Mbps Ethernet/half duplex; hardcode
SW3 s interface Fa0/24 for these settings.
" Do not use any global configuration commands to accomplish this task.
2 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 15
2. WAN Technologies
2.1. Hub-and-Spoke
" Configure a Frame Relay hub-and-spoke network between R1, R2, and
R4 with R1 as the hub.
" R1 should use only the physical Serial interface.
" R2 and R4 should use a point-to-point subinterface numbered .124.
" Use only the DLCIs specified in the diagram.
3 Points
2.2. Hub-and-Spoke
" Configure a Frame Relay hub-and-spoke network between R2, R3, and
R4 with R3 as the hub.
" R3 should use only the physical Serial interface.
" R2 and R4 should use a multipoint subinterface numbered .234.
" Use only the DLCIs specified in the diagram.
" Use only dynamic layer 3 to layer 2 mappings over these Frame Relay
connections.
" R2, R3, and R4 should only send InARP requests on DLCIs 203, 302, 304
and 403.
" Ensure that R2, R3, and R4 all have IP reachability to each other on this
segment.
" You are allowed to use one static route on both R2 and R4 to accomplish
this.
3 Points
2.3. Point-to-Point
" Using only physical interfaces configure the Frame Relay connections
between R3 & R5 and R6 & BB1.
" Do not use any DLCIs other than those specified in the diagram.
" Do not use dynamic layer 3 to layer 2 mappings over these Frame Relay
connections.
2 Points
2.4. PPP
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" Configure PPP on the Serial link between R4 and R5.
" Authenticate this link with the clear-text username PPP and the password
CISCO.
2 Points
3. Interior Gateway Routing
3.1. EIGRP
" Configure EIGRP AS 100 on R1, R2, R3, R4, and R6.
" Enable EIGRP on VLANs 3 and 26.
" Enable EIGRP on all subnets of the Frame Relay cloud.
" Advertise the Loopback 0 addresses of R1, R2, and R6 into the EIGRP
domain.
3 Points
3.2. EIGRP
" Configure EIGRP AS 10 on the Frame Relay link between R6 and BB1.
" Authenticate this adjacency with key 1 and the MD5 hashed password
CISCO.
" Advertise VLAN 6 into EIGRP AS 10.
" Configure R6 to advertise a single route to BB1 representing your entire
major network 130.X.0.0/16.
" Do not use EIGRP auto-summarization to accomplish this.
3 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 15
3.3. EIGRP
" Configure the EIGRP domain so that R1 uses R2 to get to VLAN 3.
" This configuration should be done on R1.
" Do not use an offset-list or prefix-list to accomplish this.
3 Points
3.4. OSPF
" Enable OSPF on R3, R4, and R5.
" Configure OSPF area 0 on VLAN 33 on R3.
" Configure OSPF area 345 on the Frame Relay circuit between R3 & R5
and the PPP link between R4 & R5.
" Advertise VLANs 5 and 52 into OSPF area 345.
" Advertise the Loopback 0 interface of R3, R4, and R5 into OSPF area
345.
3 Points
3.5. OSPF
" As a security precaution, your corporate policy dictates that OSPF LSA
advertisements should not be sent out interfaces that connect to stub
networks.
" Do not use the passive interface command to accomplish this.
" Configure R3 to reflect this policy.
2 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 15
3.6. OSPF
" Configure an additional OSPF process on R1, SW1, and SW2.
" Configure OSPF area 0 on the Ethernet segment between SW1 and SW2.
" Configure OSPF area 51 on VLAN 17 between R1 & SW1, and on VLAN
8 of SW2.
" Advertise the Ethernet segments between SW1 & BB3 and SW2 & SW3
into the OSPF domain.
" Advertise the Loopback 0 interfaces of SW1 and SW2 into OSPF.
2 Points
3.7. OSPF
" In order to prevent false routing information from being injected into the
OSPF domain authenticate the adjacency between R1 and SW1 with the
MD5 hashed password CISCO.
" Do not use the ip ospf authentication message-digest command on
either of these devices.
" No other adjacencies should be authenticated.
2 Points
3.8. IGP Redistribution
" Redistribute EIGRP AS 10 into EIGRP AS 100 on R6.
" Redistribute between OSPF and EIGRP on R1, R3, and R4.
" R5 should route over the PPP link to R4 to get to the routes learned from
EIGRP AS 10.
" In the case that the PPP link is down R5 should reroute to R3.
" Do not change the metric of routes redistributed from EIGRP into OSPF
on either R3 or R4 to accomplish this.
3 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 15
4. Exterior Gateway Routing
4.1. BGP Peering
" Configure BGP on the following devices with the following AS numbers:
Device BGP AS
R1 65178
R2 65026
R3 200
R4 200
R5 200
R6 65026
SW1 65178
SW2 65178
BB1 54
BB2 254
BB3 54
" Configure the BGP peering sessions as follows:
Device 1 Device 2
SW2 SW1
SW1 BB3
SW1 R1
R1 R2
R1 R4
R2 R6
R6 BB1
R2 R3
R3 R4
R3 R5
R5 R4
R5 BB2
" R1, R2, R6, SW1, and SW2 should all look like members of AS 100 from
the perspective of the other BGP speaking devices.
" R5 should authenticate the BGP peering session with BB2 using an MD5
hash of the password CISCO.
3 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 15
4.2. BGP Outbound Route Filtering
" Network monitoring of R3 and R4 has indicated high CPU utilization which
appears to be related to the BGP process. After looking into the problem
further engineers in AS 200 have noticed that a full BGP table is being
learned from AS 100 and then many of these prefixes are getting
withdrawn due to AS 200 s filtering policy. Although many prefixes are
being filtered out the border routers of AS 200 must still process all these
updates before they can be discarded. In response to this AS 200 has
requested that AS 100 maintain an outbound filtering policy for prefixes
advertised to AS 200, however engineers in AS 100 have refused to do so
due to the large administrative overhead. After heated negotiations,
engineers of AS 100 and AS 200 have agreed to implement BGP
Outbound Route Filtering (ORF).
" Configure ORF on the peering session between R1 and R4.
" R1 should send only the following prefixes to R4:
o 28.119.16.0/24
o 28.119.17.0/24
" Do not apply any filter on R1 to accomplish this.
3 Points
4.3. BGP Outbound Route Filtering
" Configure ORF on the peering session between R2 and R3.
" R2 should send only the following prefixes to R3:
o 112.0.0.0/8
o 113.0.0.0/8
o 114.0.0.0/8
o 115.0.0.0/8
o 116.0.0.0/8
o 117.0.0.0/8
o 118.0.0.0/8
o 119.0.0.0/8
" Do not apply any filter on R2 to accomplish this.
" Use the minimum amount of lines necessary in the prefix-list on R3 to
accomplish this.
3 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 15
5. IP Multicast
5.1. PIM
" Configure IP Multicast routing on R1, R2, R3, R6, SW1, and SW2.
" Configure PIM sparse mode on the following interfaces:
Device Interface
R1 Fa0/0
R1 S0/0
R2 Fa0/0
R2 S0/0.124
R2 S0/0.234
R3 S1/0
R3 E0/0
R3 E0/1
R6 G0/0
R6 G0/1
SW1 Fa0/14
SW1 VLAN 17
SW2 Fa0/14
SW2 VLAN 8
2 Points
5.2. RP Assignment
" Configure R3 to advertise itself as a candidate bootstrap router throughout
the PIM domain.
" Configure R1 and R2 as candidate RPs.
" R1 should service the multicast groups 224.0.0.0 231.255.255.255.
" R2 should service the multicast groups 232.0.0.0 239.255.255.255.
" Use the minimum amount of access-list entries on both R1 and R2 to
accomplish this.
3 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 15
5.3. Multicast Filtering
" Recent traffic monitoring has indicated that users in VLAN 8 have been
abusing network bandwidth by subscribing to high traffic multicast feeds.
" To help reduce the load on the network configure SW2 so that users in
VLAN 8 can only belong to three multicast groups at a time.
" Additionally ensure that these users cannot join groups for which R2 is the
RP.
3 Points
6. IPv6
6.1. IPv6 Addressing
" Configure IPv6 on the Loopback interfaces of R2 and R6 using the
addresses 2001:150:X:Y::Y/128.
" Configure IPv6 on VLAN 6 of R6 using the network 2001:130:X:6::/64.
" Configure IPv6 on VLAN 26 between R2 and R6 using the network
2001:130:X:26::/64.
" Hosts on VLAN 26 should only use R2 as a default gateway.
3 Points
6.2. IPv6 Tunneling
" Configure IPv6 on VLAN 5 of R5 using the network 2001:130:X:5::/64.
" Configure an IPv6 over IPv4 tunnel between R2 and R5 using the network
2001:130:X:25::/64.
" This tunnel should be able to survive a failure of the PPP link between R4
and R5.
2 Points
6.3. RIPng
" Configure RIPng on VLANs 6, 26, and the Loopbacks of R2 and R6.
" R2 should advertise VLAN 5 to R6.
" Static routing is allowed to accomplish this.
3 Points
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6.4. IPv6 Routing
" Configure one static route on R5 to gain reachability to all of the networks
attached to R2 and R6.
" This route should be as specific as possible any overlap the minimum
amount of address space necessary to gain reachability.
3 Points
7. QoS
7.1. Legacy QoS Conversion
" You have been tasked with migrating the legacy custom queuing
configuration on R5 s interface E0/1 connecting to BB2 to the more flexible
Modular QoS CLI. R5's custom queueing configuration is as follows:
interface Ethernet0/1
custom-queue-list 1
!
queue-list 1 protocol ip 1 tcp www
queue-list 1 protocol ip 2 tcp ftp
queue-list 1 protocol ip 2 tcp ftp-data
queue-list 1 protocol ip 3 tcp telnet
queue-list 1 default 4
queue-list 1 queue 1 byte-count 5000 limit 30
queue-list 1 queue 2 byte-count 3000
queue-list 1 queue 3 byte-count 500
3 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 15
7.2. Priority Queueing
" Host accessing an audio feed from VLAN 17 have been complaining
about poor audio quality and dropouts. After further investigation it
appears that this traffic is getting delayed behind larger data packets when
R1 sends it out to the Frame Relay cloud.
" In order to resolve this problem configure R1 so that this audio traffic is
always sent before any other data traffic out the Frame Relay link.
" The server s IP address is 130.X.17.139, and is sending the audio feed as
unicast to UDP port 8940.
" Do not use a policy-map to accomplish this.
3 Points
8. Security
8.1. Attack Mitigation
" Recently you have noticed very high utilization on numerous devices
throughout your network. After further investigation you have determined
that various hosts in VLAN 5 are infected with the SQL Slammer worm. In
order to reduce the load on your network while your network
administrators install the appropriate patches configure R5 to contain this
traffic.
" Hosts infected with this worm are sending out 404 byte packets destined
for UDP port 1434.
" Ensure that other normal SQL traffic is not affected by this filter.
" Do not use an access-list to accomplish this.
3 Points
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8.2. Firewall Feature Set
" In order to prevent hosts from being infected in the future you have
decided to implement CBAC on R5 s connection to BB2. This way hosts
from outside your network cannot initiate sessions into your internal
network, which reduces the risk of virii and worms entering the network.
" Configure R5 to only allow traffic to come in the Ethernet connection to
BB2 if it has been originated from inside your network.
" For connectivity testing purposes ensure that R5 can ping BB2.
3 Points
9. System Management
9.1. RMON
" Recently you have been trying to justify to your management the need for
additional bandwidth on R1 s WAN connection. However your manager
does not believe that the current circuit is being utilized as much as you
say it is. In order to show him the amount of congestion the interface is
undergoing, configure R1 to generate an SNMP trap whenever the output
queue length (ifEntry.21.2) of its Serial0/0 interface exceeds 750 packets.
" This MIB value should be sampled every 60 seconds.
" When there are more than 750 packets in the output queue R1 should
generate the message WARNING: Frame Relay Circuit Congested .
" When the value falls back to 100, an event should be generated that reads
NOTICE: Frame Relay Circuit Within Normal Utilization .
" The server to send these SNMP traps to is 130.X.17.100.
" This server will be expecting the community string to be IETRAP.
3 Points
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CCIE Routing & Switching Lab Workbook Version 4.0 Lab 15
9.2. Banners
" In order to facilitate in verifying BGP route propagation you have decided
to allow unauthenticated telnet access to R6 so users can view the BGP
table.
" Configure R6 so that when users telnet in they are immediately put into
privilege level 1 without having to enter a username or password.
" Once the command line is active the following banner should be
displayed:
################################################
######### AS 100 Route View Server ############
# Use this device to view the Internet routing #
# table from the perspective of AS 100 #
################################################
3 Points
9.3. Telnet Control
" After opening up access to R6 your security team has become concerned
about hackers using R6 as a launching point for their telnet sessions.
" Configure R6 so that once users telnet into R6 they cannot telnet back out
to another device.
" Do not use the privilege command to accomplish this.
3 Points
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10. IP Services
10.1. Gateway Redundancy
" Recently a failure of the category 5 Ethernet cable attached to R6 s G0/1
interface resulted in severe network downtime for the users in VLAN 26.
In order to prevent this problem from occurring in the future your design
team has mandated that both R2 and R6 should be able to play the role of
the default gateway for VLAN 26 depending on which of them is available.
" Configure your network so that R6 is the preferred default gateway for this
segment.
" In the case that R6 is unreachable R2 should take over as the default
gateway on this segment.
" If R6 returns after a failure R2 should relinquish its role as the default
gateway for the segment. However in order to ensure that the routing
domain has properly reconverged R6 should not assume the role of the
gateway until it has been up for at least five minutes.
" Do not use HSRP to accomplish this.
3 Points
10.2. Gateway Redundancy
" Even after implementing the previous configuration you have received a
report of downtime from hosts on VLAN 26. Apparently the Frame Relay
circuit between R6 and BB1 was down, but hosts were still sending their
traffic to R6. To avoid this problem configure R6 to track the state of the
Frame Relay circuit to BB1.
" Since LMI may remain active even if the PVC to BB1 is inactive your
design team has recommended that R6 track reachability to the route
200.0.0.0/24.
" If this route is unreachable by R6 then R2 should become the active
gateway for hosts on VLAN 26.
3 Points
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10.3. Traffic Accounting
" Your security team is interested in how many hosts are trying to initiate
sessions into your network.
" Configure R5 to keep track of these hosts attempting to violate the
previously implemented filtering policy.
" To prevent this table using up all of R5 s memory ensure that a maximum
of 100 entries can exist in the table at any given time.
2 Points
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