CCNA Lab - Solution Rev1.0 Basic Traffic Engineering

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Lab17 Solutions: Basic Traffic Engineering

Before starting this task, make sure MPLS is disabled on all physical
interfaces between PE1, PE2, and PE3. MPLS labels should depend
on MPLS traffic engineering tunnels.
♦ Task 17.1:
The mpls traffic-eng tunnels is a global command. It will allow
activating MPLS Traffic-Eng commands. Without activating globally
you won’t be able to configure any traffic engineering parameters.
PE1-RACK1(config)#mpls traffic-eng tunnels
PE2-RACK1(config)#mpls traffic-eng tunnels
PE3-RACK1(config)#mpls traffic-eng tunnels
PE4-RACK1(config)#mpls traffic-eng tunnels
ASBR1-RACK1(config)#mpls traffic-eng tunnels
RR1-RACK1(config)#mpls traffic-eng tunnels

♦ Enable Traffic Engineering on each interface where possible.
Similar command will activate MPLS traffic engineering per
interface. Every interface in the path that is required to pass the TE
tunnel needs to have the mpls traffic-eng tunnels configured.
Otherwise, TE won’t pass any traffic from end to end.
PE1-RACK1(config)#int fastEthernet 0/0
PE1-RACK1(config-if)#mpls traffic-eng tunnels
PE1-RACK1(config-if)#int fastEthernet 0/1
PE1-RACK1(config-if)#mpls traffic-eng tunnels
PE2-RACK1(config)#int e 0/0.20
PE2-RACK1(config-subif)#mpls traffic-eng tunnels

PE2-RACK1(config-subif)#int e 0/0.21
PE2-RACK1(config-subif)#mpls traffic-eng tunnels
PE2-RACK1(config-subif)#int e 0/0.123
PE2-RACK1(config-subif)#mpls traffic-eng tunnels
PE3-RACK1(config)#int e 0/0.30
PE3-RACK1(config-subif)#mpls traffic-eng tunnels
PE3-RACK1(config-subif)#int e0/0.31
PE3-RACK1(config-subif)#mpls traffic-eng tunnels

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Lab17 Solutions: Basic Traffic Engineering

PE3-RACK1(config-subif)#int e0/0.123
PE3-RACK1(config-subif)#mpls traffic-eng tunnels
RR1-RACK1(config-subif)#int e 0/0.20
RR1-RACK1(config-subif)#mpls traffic-eng tunnels
RR1-RACK1(config-subif)#int e 0/0.30
RR1-RACK1(config-subif)#mpls traffic-eng tunnels

♦ Configure reserved bandwidth on all serial interfaces to 1158K.
Traffic engineering is depending on RSVP to pass TE labels end to

end. Similar to MPLS, we use IGP to pass labels end to end. In
Traffic Engineering configuration, TE depends on RSVP to pass the
TE labels, so RSVP is required to run for each interface in data path
forwarding of TE. ip-rsvp bandwidth is used to specify allocated
bandwidth that you reserved for TE over specific interface.
PE1-RACK1(config)#int ser 0/0.101
PE1-RACK1(config-subif)#ip rsvp bandwidth 1158
PE1-RACK1(config-subif)#mpls traffic-eng tunnels
PE1-RACK1#sho ip rsvp interface serial 0/0.101
interface
allocated i/f max flow max sub max
Se0/0.101
0
1158K
1158K
0

♦ Configure reserved bandwidth on all FastEthernet links to 75M
kbps.
interface FastEthernet0/0
description to PE3 VLAN31
ip address 172.16.13.1 255.255.255.0
ip rsvp bandwidth 75000
!
interface FastEthernet0/1
description to PE2 VLAN21
ip address 172.16.12.1 255.255.255.0
ip rsvp bandwidth
PE1-RACK1#sho ip rsvp interface fastEthernet 0/0
interface

allocated i/f max flow max sub max
Fa0/0
0
75M
75M
0

♦ Configure reserved bandwidth on all Ethernet interfaces to
7500K without specifying optional commands in the RSVP mode.
This task does not require the bandwidth to be specified because
the default behavior of 10MB is set to 7500K.

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Lab17 Solutions: Basic Traffic Engineering

PE2-RACK1(config)#interface Ethernet0/0.20
PE2-RACK1(config-subif)# description to RR - VLAN 20
PE2-RACK1(config-subif)# encapsulation dot1Q 20
PE2-RACK1(config-subif)# ip address 172.16.20.2 255.255.255.0
PE2-RACK1(config-subif)# ip rsvp bandwidth
PE2-RACK1(config-subif)#interface Ethernet0/0.21

PE2-RACK1(config-subif)# description to PE1 - VLAN 21
PE2-RACK1(config-subif)# encapsulation dot1Q 21
PE2-RACK1(config-subif)# ip address 172.16.12.2 255.255.255.0
PE2-RACK1(config-subif)# ip rsvp bandwidth
PE2-RACK1(config-subif)#interface Ethernet0/0.123
PE2-RACK1(config-subif)# description to PE3 - VLAN 123
PE2-RACK1(config-subif)# encapsulation dot1Q 123
PE2-RACK1(config-subif)# ip address 172.16.123.2 255.255.255.0
PE2-RACK1(config-subif)# ip rsvp bandwidth
PE2-RACK1#sho ip rsvp interface
interface
allocated i/f max
Et0/0.20
0
7500K
Et0/0.21
0
7500K
Et0/0.123
0
7500K

flow max
7500K
7500K
7500K

sub max
0
0

0

♦ Configure IS-IS as the routing protocol for Traffic Engineering
support.
This task is very important for TE to work. TE is depending on IGP
to build the routing topology and pass this routing topology to the
TE database. Today TE is only supported by OSPF and IS-IS.
In IS-IS it is required to run metric-style wide. This is a new
format for ISIS to support new features like TE, for example. As
soon as you apply the TE commands in IS-IS, TE and RSVP will try
to send this RSVP topology down to IS-IS.
PE1-RACK1(config-router)#
PE1-RACK1(config-router)#
PE1-RACK1(config-router)#
PE1-RACK1(config-router)#
PE1-RACK1(config-router)#
PE1-RACK1(config-router)#

net 48.0000.0001.0001.00
metric-style wide
log-adjacency-changes all
mpls traffic-eng router-id Loopback0
mpls traffic-eng level-1
passive-interface Loopback0

PE2-RACK1(config-router)#
PE2-RACK1(config-router)#
PE2-RACK1(config-router)#
PE2-RACK1(config-router)#
PE2-RACK1(config-router)#

PE2-RACK1(config-router)#

net 48.0000.0002.0002.00
metric-style wide
log-adjacency-changes all
mpls traffic-eng router-id Loopback0
mpls traffic-eng level-1
passive-interface Loopback0

PE3-RACK1(config-router)# net 48.0000.0003.0003.00

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Lab17 Solutions: Basic Traffic Engineering

PE3-RACK1(config-router)#
PE3-RACK1(config-router)#
PE3-RACK1(config-router)#
PE3-RACK1(config-router)#
PE3-RACK1(config-router)#

metric-style wide

log-adjacency-changes all
mpls traffic-eng router-id Loopback0
mpls traffic-eng level-1
passive-interface Loopback0

RR1-RACK1(config-router)#
RR1-RACK1(config-router)#
RR1-RACK1(config-router)#
RR1-RACK1(config-router)#
RR1-RACK1(config-router)#
RR1-RACK1(config-router)#

net 48.0000.0254.0254.00
metric-style wide
log-adjacency-changes all
mpls traffic-eng router-id Loopback0
mpls traffic-eng level-1
passive-interface Loopback0

PE2-RACK1#sho isis mpls traffic-eng advertisements
System ID: PE2-RACK1.00
Router ID: 10.1.1.2
Link Count: 2
Link[1]
Neighbor System ID: RR1-RACK1.01 (broadcast link)
Interface IP address: 172.16.20.2
Neighbor IP Address: 0.0.0.0
Admin. Weight te: 10 igp: 10
Physical BW: 10000 kbits/sec
Reservable Global Pool BW: 7500 kbits/sec

Reservable Sub Pool BW: 0 kbits/sec
Global Pool BW unreserved:
[0]: 7500 kbits/sec, [1]: 7500 kbits/sec
[2]: 7500 kbits/sec, [3]: 7500 kbits/sec
[4]: 7500 kbits/sec, [5]: 7500 kbits/sec
[6]: 7500 kbits/sec, [7]: 7500 kbits/sec
Sub Pool BW unreserved:
[0]: 7500 kbits/sec, [1]: 7500 kbits/sec
[2]: 7500 kbits/sec, [3]: 7500 kbits/sec
[4]: 7500 kbits/sec, [5]: 7500 kbits/sec
[6]: 7500 kbits/sec, [7]: 7500 kbits/sec
Affinity Bits: 0x00000000
Link[2]
Neighbor System ID: PE1-RACK1.00 (P2P link)
Interface IP address: 172.16.12.2
Neighbor IP Address: 172.16.12.1
Admin. Weight te: 10 igp: 10
Physical BW: 10000 kbits/sec
Reservable Global Pool BW: 7500 kbits/sec
Reservable Sub Pool BW: 0 kbits/sec
Global Pool BW unreserved:
[0]: 7500 kbits/sec, [1]: 7500 kbits/sec
[2]: 7500 kbits/sec, [3]: 7500 kbits/sec
[4]: 7500 kbits/sec, [5]: 7500 kbits/sec
[6]: 7500 kbits/sec, [7]: 7500 kbits/sec
Sub Pool BW unreserved:
[0]: 7500 kbits/sec, [1]: 7500 kbits/sec
[2]: 7500 kbits/sec, [3]: 7500 kbits/sec
[4]: 7500 kbits/sec, [5]: 7500 kbits/sec
[6]: 7500 kbits/sec, [7]: 7500 kbits/sec

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Lab17 Solutions: Basic Traffic Engineering

Affinity Bits: 0x00000000
PE2-RACK1#sho mpls traffic-eng link-management igp-neighbors
Link ID:: Tu101
Link ID:: Et0/0.20
Neighbor ID: 0000.0254.0254.01 (area: isis level-1, IP: 0.0.0.0)
Link ID:: Et0/0.21
Neighbor ID: 0000.0001.0001.00 (area: isis level-1, IP: 172.16.12.1)
Link ID:: Et0/0.123

Task 17.2: Configure Tail End and Head End for TE:
♦ CORRECTIONS!!! Configure dynamic tunnel 101 from PE2 to
PE3.
There are multiple ways in which TE can be configured to select a
path. In our case, we want to use a path based on IGP instead of
TE. Dynamic options allow TE to figure out the best path to tail end
and head end on each side. You need to enable traffic-eng
tunnels per interface and specify each tunnel point.

As you can see, under path-options you have the ability to assign a
number which can be used only in case of failure to switch to the
manual path (which we will cover in Lab 18).
PE2-RACK1(config-if)#interface Tunnel101
PE2-RACK1(config-if)# description to PE3
PE2-RACK1(config-if)# ip unnumbered Loopback0
PE2-RACK1(config-if)# mpls traffic-eng tunnels
PE2-RACK1(config-if)# tunnel destination 10.1.1.3
PE2-RACK1(config-if)# tunnel mode mpls traffic-eng
PE2-RACK1(config-if)# tunnel mpls traffic-eng path-option 1 dynamic
PE3-RACK1(config-if)#interface Tunnel101
PE3-RACK1(config-if)# description to PE2
PE3-RACK1(config-if)# ip unnumbered Loopback0
PE3-RACK1(config-if)# mpls traffic-eng tunnels
PE3-RACK1(config-if)# tunnel destination 10.1.1.2
PE3-RACK1(config-if)# tunnel mode mpls traffic-eng
PE3-RACK1(config-if)# tunnel mpls traffic-eng path-option 1 dynamic
♦
Configure TE to instruct the IGP to use the tunnel in its
enhanced SPF calculation.

PE2-RACK1(config-if)#interface Tunnel101
PE2-RACK1(config-if)# tunnel mpls traffic-eng autoroute announce
PE3-RACK1(config-if)#interface Tunnel101
PE3-RACK1(config-if)# tunnel mpls traffic-eng autoroute announce

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Lab17 Solutions: Basic Traffic Engineering

After this task you should see the tunnel attempt to come up using
auto-route. This feature announces that it will advertise itself in to
the IGP to attempt to bring the TE tunnel.
PE2-RACK1#sho mpls traffic-eng autoroute
MPLS TE autorouting enabled
destination 0000.0003.0003.00 has 1 tunnels
Tunnel101 (load balancing metric 0, nexthop 10.1.1.3, absolute metric 1)

♦ Configure tunnel 101 with reservation priorities of the tunnel to
be set at 0 0.
This feature is used to allow TE tunnels to toggle between multiple
TE tunnels in case of failure. You would use it when you have
multiple tunnels and you want to have different path selection and
behavior for each tunnel in the path. priority 0 0 would be the
first active tunnel. If you have another tunnel with a different path,
with priority 1 1, it will be the next option to select.
PE2-RACK1(config)#int tun 101
PE2-RACK1(config-if)#tunnel mpls traffic-eng priority 0 0
PE3-RACK1(config)#int tun 101
PE3-RACK1(config-if)#tunnel mpls traffic-eng priority 0 0

♦ Configure tunnel 101 with the record route function.

PE2-RACK1(config)#int tunnel 101
PE2-RACK1(config-if)#tunnel mpls traffic-eng record-route
PE3-RACK1(config)#int tunnel 101
PE3-RACK1(config-if)#tunnel mpls traffic-eng record-route
PE3-RACK1#sho mpls traffic-eng tunnels tunnel 101
Name: to PE2
Status:
Admin: up

(Tunnel101) Destination: 10.1.1.2
Oper: up

Path: valid

Signalling: connected

path option 1, type dynamic (Basis for Setup, path weight 20)
Config Parameters:
Bandwidth: 0
kbps (Global) Priority: 0 0
Affinity: 0x0/0xFFFF
Metric Type: TE (interface)
AutoRoute: enabled
LockDown: disabled Loadshare: 0
bw-based
auto-bw: (86400/0) 0 Bandwidth Requested: 0
InLabel : OutLabel : Ethernet0/0.31, 65

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Lab17 Solutions: Basic Traffic Engineering

RSVP Signalling Info:
Src 10.1.1.3, Dst 10.1.1.2, Tun_Id 101, Tun_Instance 2
RSVP Path Info:
My Address: 172.16.13.3
Explicit Route: 172.16.13.1 172.16.12.2 10.1.1.2
Record Route:
Tspec: ave rate=0 kbits, burst=1000 bytes, peak rate=0 kbits
RSVP Resv Info:
Record Route: 172.16.13.1 172.16.12.2
Fspec: ave rate=0 kbits, burst=1000 bytes, peak rate=0 kbits
Shortest Unconstrained Path Info:
Path Weight: 20 (TE)
Explicit Route: 172.16.13.3 172.16.13.1 172.16.12.2 10.1.1.2
History:
Tunnel:
Time since created: 7 days, 7 hours, 49 minutes
Time since path change: 8 hours, 51 minutes
Current LSP:
Uptime: 8 hours, 51 minutes
Prior LSP:

ID: path option 1 [1]
Removal Trigger: router ID changed

♦ Configure tunnel 101 to support the TE traffic metric instead of
depending on an IGP.
This task shows you how to specify the metric type to use for PE2 –
PE3 calculation when you are determining a tunnel path direction.
PE2-RACK1(config)#int tun 101
PE2-RACK1(config-if)#tunnel mpls traffic-eng path-selection metric te
PE3-RACK1(config)#int tun 101
PE3-RACK1(config-if)#tunnel mpls traffic-eng path-selection metric te
PE2-RACK1# sho mpls traffic-eng tunnels tunnel 101
Name: to PE3
Status:
Admin: up

(Tunnel101) Destination: 10.1.1.3
Oper: up

Path: valid

Signalling: connected

path option 1, type dynamic (Basis for Setup, path weight 20)
Config Parameters:
Bandwidth: 0
kbps (Global) Priority: 0 0
Affinity: 0x0/0xFFFF
Metric Type: TE (interface)
AutoRoute: enabled

LockDown: disabled Loadshare: 0
bw-based
auto-bw: (86400/0) 0 Bandwidth Requested: 0
InLabel : OutLabel : Ethernet0/0.21, 64
RSVP Signalling Info:
Src 10.1.1.2, Dst 10.1.1.3, Tun_Id 101, Tun_Instance 517
RSVP Path Info:
My Address: 10.1.1.2
Explicit Route: 172.16.12.1 172.16.13.1 172.16.13.3 10.1.1.3

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Lab17 Solutions: Basic Traffic Engineering

Record Route:
Tspec: ave rate=0 kbits, burst=1000 bytes, peak rate=0 kbits
RSVP Resv Info:
Record Route: NONE
Fspec: ave rate=0 kbits, burst=1000 bytes, peak rate=0 kbits
Shortest Unconstrained Path Info:
Path Weight: 20 (TE)
Explicit Route: 172.16.12.1 172.16.13.1 172.16.13.3 10.1.1.3

History:
Tunnel:
Time since created: 11 hours, 25 minutes
Time since path change: 27 minutes, 52 seconds
Current LSP:
Uptime: 27 minutes, 52 seconds
Prior LSP:
ID: path option 1 [30]
Removal Trigger: tunnel shutdown

♦ Configure TE tunnel’s bandwidth to suit the traffic flow such that
it constantly tracks the average use of the MPLS TE tunnel.
PE2-RACK1(config)#int tunnel 101
PE2-RACK1(config-if)#tunnel mpls traffic-eng auto-bw
PE3-RACK1(config)#int tunnel 101
PE3-RACK1(config-if)#tunnel mpls traffic-eng auto-bw

This command allows the tunnel bandwidth to be adjusted
automatically.
♦ Verify if the tunnel is up and traffic is being passed across
tunnel 101.
PE2-RACK1#sho interfaces tunnel 101
Tunnel101 is up, line protocol is up
Hardware is Tunnel
Description: to PE3
Interface is unnumbered. Using address of Loopback0 (10.1.1.2)
MTU 1514 bytes, BW 9 Kbit, DLY 500000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive not set

Tunnel source UNKNOWN, destination 10.1.1.3
Tunnel protocol/transport Label Switching, key disabled, sequencing
disabled
Checksumming of packets disabled, fast tunneling enabled
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec

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Lab17 Solutions: Basic Traffic Engineering

0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
173 packets output, 9397 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out

PE3-RACK1#sho interfaces tunnel 101
Tunnel101 is up, line protocol is up
Hardware is Tunnel
Description: to PE2
Interface is unnumbered. Using address of Loopback0 (10.1.1.3)
MTU 1514 bytes, BW 9 Kbit, DLY 500000 usec,
reliability 255/255, txload 28/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel source UNKNOWN, destination 10.1.1.2
Tunnel protocol/transport Label Switching, key disabled, sequencing
disabled
Checksumming of packets disabled, fast tunneling enabled
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 1000 bits/sec, 1 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
164 packets output, 9786 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
PE2-RACK1#sho mpls traffic-eng tunnels tunnel 101 brief
Signalling Summary:
LSP Tunnels Process:
running

RSVP Process:
running
Forwarding:
enabled
Periodic reoptimization:
every 60 seconds, next in 17 seconds
Periodic auto-bw collection:
disabled
TUNNEL NAME
DESTINATION
UP IF
DOWN IF
STATE/PROT
to PE3
10.1.1.3
Et0/0.21 up/up

PE3-RACK1#sho mpls traffic-eng tunnels tunnel 101 brief
Signalling Summary:
LSP Tunnels Process:
running
RSVP Process:
running
Forwarding:
enabled
Periodic reoptimization:
every 60 seconds, next in 29 seconds
Periodic auto-bw collection:
disabled
TUNNEL NAME

DESTINATION
UP IF
DOWN IF
STATE/PROT
to PE2
10.1.1.2
Et0/0.31 up/up

9

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Lab17 Solutions: Basic Traffic Engineering

PE2-RACK1#sho mpls traffic-eng tunnels tunnel 101
Name: to PE3
Status:
Admin: up

(Tunnel101) Destination: 10.1.1.3
Oper: up

Path: valid

Signalling: connected

path option 1, type dynamic (Basis for Setup, path weight 20)
Config Parameters:
Bandwidth: 0
kbps (Global) Priority: 0 0
Affinity: 0x0/0xFFFF
Metric Type: TE (interface)
AutoRoute: enabled
LockDown: disabled Loadshare: 0
bw-based
auto-bw: (86400/0) 0 Bandwidth Requested: 0
InLabel : OutLabel : Ethernet0/0.21, 64
RSVP Signalling Info:
Src 10.1.1.2, Dst 10.1.1.3, Tun_Id 101, Tun_Instance 11
RSVP Path Info:
My Address: 10.1.1.2
Explicit Route: 172.16.12.1 172.16.13.1 172.16.13.3 10.1.1.3
Record Route:
Tspec: ave rate=0 kbits, burst=1000 bytes, peak rate=0 kbits
RSVP Resv Info:
Record Route: 172.16.12.1 172.16.13.3
Fspec: ave rate=0 kbits, burst=1000 bytes, peak rate=0 kbits
Shortest Unconstrained Path Info:
Path Weight: 20 (TE)
Explicit Route: 172.16.12.1 172.16.13.1 172.16.13.3 10.1.1.3
History:
Tunnel:
Time since created: 2 hours, 45 minutes
Time since path change: 11 minutes, 45 seconds

Current LSP:
Uptime: 11 minutes, 45 seconds
Selection: reoptimation
Prior LSP:
ID: path option 1 [6]
Removal Trigger: configuration changed

PE3-RACK1#sho mpls traffic-eng tunnels tunnel 101
Name: to PE2
Status:
Admin: up

(Tunnel101) Destination: 10.1.1.2
Oper: up

Path: valid

Signalling: connected

path option 1, type dynamic (Basis for Setup, path weight 20)
Config Parameters:
Bandwidth: 0
kbps (Global) Priority: 0 0
Affinity: 0x0/0xFFFF
Metric Type: TE (interface)
AutoRoute: enabled
LockDown: disabled Loadshare: 0
bw-based
auto-bw: (86400/0) 0 Bandwidth Requested: 0
InLabel : OutLabel : Ethernet0/0.31, 65

RSVP Signalling Info:

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Lab17 Solutions: Basic Traffic Engineering

Src 10.1.1.3, Dst 10.1.1.2, Tun_Id 101, Tun_Instance 2
RSVP Path Info:
My Address: 172.16.13.3
Explicit Route: 172.16.13.1 172.16.12.2 10.1.1.2
Record Route:
Tspec: ave rate=0 kbits, burst=1000 bytes, peak rate=0 kbits
RSVP Resv Info:
Record Route: 172.16.13.1 172.16.12.2
Fspec: ave rate=0 kbits, burst=1000 bytes, peak rate=0 kbits
Shortest Unconstrained Path Info:
Path Weight: 20 (TE)
Explicit Route: 172.16.13.3 172.16.13.1 172.16.12.2 10.1.1.2
History:
Tunnel:
Time since created: 6 days, 23 hours, 16 minutes
Time since path change: 18 minutes, 18 seconds

Current LSP:
Uptime: 18 minutes, 18 seconds
Prior LSP:
ID: path option 1 [1]
Removal Trigger: router ID changed

PE2-RACK1#sho isis mpls traffic-eng tunnel
System Id
Tunnel Name
BW Metric
PE3-RACK1.00
Tunnel101
0

Nexthop
10.1.1.3

Metric
1

Mode
Absolute

PE3-RACK1#sho isis mpls traffic-eng tunnel
System Id
Tunnel Name
BW Metric
PE2-RACK1.00
Tunnel101
0

Nexthop
10.1.1.2

Metric
1

Mode
Absolute

♦ All traffic from PE2 to PE3 must flow through tunnel 101.
PE2-RACK1#sho mpls traffic-eng topology path tunnel 101
Query Parameters:
Destination: 10.1.1.3
Bandwidth: 0
Priorities: 0 (setup), 0 (hold)
Affinity: 0x0 (value), 0xFFFF (mask)
Query Results:
Min Bandwidth Along Path: 7500 (kbps)
Max Bandwidth Along Path: 75000 (kbps)
Hop 0: 172.16.12.2
: affinity 00000000, bandwidth 7500 (kbps)
Hop 1: 172.16.13.1
: affinity 00000000, bandwidth 75000 (kbps)
Hop 2: 172.16.13.3
: affinity 00000000, bandwidth 7500 (kbps)
Hop 3: 10.1.1.3
PE2-RACK1#sho ip route isis | include Tun
i L1
172.16.30.0 [115/1] via 10.1.1.3, Tunnel101

i L1
172.16.13.0 [115/1] via 10.1.1.3, Tunnel101
i L1
10.1.1.3 [115/1] via 10.1.1.3, Tunnel101
i L1 192.168.2.0/24 [115/1] via 10.1.1.3, Tunnel101
PE2-RACK1(config)#interface Tunnel101

11

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PE2-RACK1(config-if)#
PE2-RACK1(config-if)#
PE2-RACK1(config-if)#
PE2-RACK1(config-if)#
PE2-RACK1(config-if)#
PE2-RACK1(config-if)#
PE2-RACK1(config-if)#
PE2-RACK1(config-if)#
PE2-RACK1(config-if)#
1
PE2-RACK1(config-if)#
PE2-RACK1(config-if)#
PE2-RACK1(config-if)#
PE2-RACK1(config-if)#
PE2-RACK1(config-if)#

|

Lab17 Solutions: Basic Traffic Engineering

description to PE3
ip unnumbered Loopback0
mpls label protocol ldp
mpls traffic-eng tunnels
tag-switching ip
tunnel destination 10.1.1.3
tunnel mode mpls traffic-eng
tunnel mpls traffic-eng autoroute announce
tunnel mpls traffic-eng autoroute metric absolute
tunnel
tunnel
tunnel
tunnel
tunnel

mpls
mpls
mpls
mpls
mpls

traffic-eng
traffic-eng
traffic-eng
traffic-eng

traffic-eng

priority 0 0
path-option 1 dynamic
record-route
path-selection metric te
auto-bw

♦ In case of PE1 and VLAN123 failure, the traffic should remain
stable.
PE2-RACK1#sho ip route isis
172.16.0.0/24 is subnetted, 3 subnets
i L1
172.16.30.0 [115/1] via 10.1.1.3, Tunnel101
i L1
172.16.13.0 [115/1] via 10.1.1.3, Tunnel101
10.0.0.0/32 is subnetted, 3 subnets
i L1
10.1.1.3 [115/1] via 10.1.1.3, Tunnel101
i L1
10.1.1.254 [115/10] via 172.16.20.254, Ethernet0/0.20
i L1 192.168.2.0/24 [115/1] via 10.1.1.3, Tunnel101

In this task, shut down PE1 and also shut down E0/0.123 on PE2
and PE3. Go back to PE2 and re-visit your status of routes.
Everything should flow over RR1 router. Verify with sho mpls
forwarding-table detail.
Configure RR1 to accept TE extension.
RR1-RACK1(config)#mpls traffic-eng tunnels
RR1-RACK1(config)#interface et0/0.20

RR1-RACK1(config-subif)#mpls traffic-eng tunnels
RR1-RACK1(config-subif)#ip rsvp bandwidth
RR1-RACK1(config-subif)#interface et0/0.30
RR1-RACK1(config-subif)#mpls traffic-eng tunnels
RR1-RACK1(config-subif)#ip rsvp bandwidth
RR1-RACK1(config)#router isis
RR1-RACK1(config-router)# net 48.0000.0254.0254.00
RR1-RACK1(config-router)# is-type level-1
RR1-RACK1(config-router)# metric-style wide
RR1-RACK1(config-router)# log-adjacency-changes all
RR1-RACK1(config-router)# mpls traffic-eng router-id Loopback0
RR1-RACK1(config-router)# mpls traffic-eng level-1
RR1-RACK1(config-router)# passive-interface Loopback0

12

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RR1-RACK1#sho mpls
Local Outgoing
tag
tag or VC
16
Untagged
17
Untagged

18
Untagged
19
Untagged
20
Pop tag
21
Pop tag

|

Lab17 Solutions: Basic Traffic Engineering

forwarding-table
Prefix
Bytes tag
or Tunnel Id
switched
172.16.13.0/24
0
192.168.2.0/24
0
10.1.1.3/32
0
10.1.1.2/32
0
10.1.1.2 101 [769] 610
10.1.1.3 101 [751] 610

Outgoing

interface
Et0/0.30
Et0/0.30
Et0/0.30
Et0/0.20
Et0/0.30
Et0/0.20

Next Hop
172.16.30.3
172.16.30.3
172.16.30.3
172.16.20.2
172.16.30.3
172.16.20.2

PE2-RACK1#sho mpls forwarding-table detail
Local Outgoing
Prefix
Bytes tag Outgoing
Next Hop
tag
tag or VC
or Tunnel Id
switched
interface
16
Untagged
172.16.13.0/24
0

Tu101
point2point
MAC/Encaps=18/22, MRU=1500, Tag Stack{20}, via Et0/0.20
0005322BEDC00002B95ECA00810000148847 00014000
No output feature configured
Per-packet load-sharing
39
Untagged
172.16.30.0/24
0
Tu101
point2point
MAC/Encaps=18/22, MRU=1500, Tag Stack{20}, via Et0/0.20
0005322BEDC00002B95ECA00810000148847 00014000
No output feature configured
Per-packet load-sharing
40
Pop tag
10.1.1.3/32
0
Tu101
point2point
MAC/Encaps=18/22, MRU=1500, Tag Stack{20}, via Et0/0.20
0005322BEDC00002B95ECA00810000148847 00014000
No output feature configured
Per-packet load-sharing
41
Untagged
10.1.1.254/32
0

Et0/0.20
172.16.20.254
MAC/Encaps=0/0, MRU=1504, Tag Stack{}
No output feature configured
Per-packet load-sharing
42
Untagged
192.168.2.0/24
0
Tu101
point2point
MAC/Encaps=18/22, MRU=1500, Tag Stack{20}, via Et0/0.20
Local Outgoing
Prefix
Bytes tag Outgoing
Next Hop
tag
tag or VC
or Tunnel Id
switched
interface
0005322BEDC00002B95ECA00810000148847 00014000
No output feature configured
Per-packet load-sharing
49
Untagged
8.8.8.0/24[V]
0
Et0/0.82
10.82.1.1

MAC/Encaps=0/0, MRU=1504, Tag Stack{}
VPN route: iementor
No output feature configured
Per-packet load-sharing
50
Aggregate
10.82.1.0/24[V]
6092
MAC/Encaps=0/0, MRU=0, Tag Stack{}
VPN route: iementor
No output feature configured
Per-packet load-sharing
PE2-RACK1#sho mpls traffic-eng tunnels tunnel 101
Name: to PE3
Status:

13

(Tunnel101) Destination: 10.1.1.3

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ieMentor CCIE™ Service Provider Workbook v1.0

Admin: up

Oper: up

|

Lab17 Solutions: Basic Traffic Engineering

Path: valid

Signalling: connected

path option 1, type dynamic (Basis for Setup, path weight 20)
Config Parameters:
Bandwidth: 0
kbps (Global) Priority: 0 0
Affinity: 0x0/0xFFFF
Metric Type: TE (interface)
AutoRoute: enabled
LockDown: disabled Loadshare: 0
bw-based
auto-bw: (86400/0) 0 Bandwidth Requested: 0
InLabel : OutLabel : Ethernet0/0.20, 20
RSVP Signalling Info:
Src 10.1.1.2, Dst 10.1.1.3, Tun_Id 101, Tun_Instance 769
RSVP Path Info:
My Address: 172.16.20.2
Explicit Route: 172.16.20.254 172.16.30.254 172.16.30.3 10.1.1.3
Record Route:
Tspec: ave rate=0 kbits, burst=1000 bytes, peak rate=0 kbits
RSVP Resv Info:
Record Route: 172.16.20.254 172.16.30.3
Fspec: ave rate=0 kbits, burst=1000 bytes, peak rate=0 kbits
Shortest Unconstrained Path Info:

Path Weight: 20 (TE)
Explicit Route: 172.16.20.2 172.16.20.254 172.16.30.254 172.16.30.3
10.1.1.3
History:
Tunnel:
Time since created: 14 hours, 19 minutes
Time since path change: 5 minutes, 41 seconds
Current LSP:
Uptime: 5 minutes, 41 seconds
Prior LSP:
ID: path option 1 [761]
Removal Trigger: path verification failed

Task 17.3: Configure VPN IEMENTOR uses traffic engineering.
PE2-RACK1(config)#ip vrf iementor
PE2-RACK1(config-vrf)# rd 1:1
PE2-RACK1(config-vrf)# route-target export 1:1
PE2-RACK1(config-vrf)# route-target import 1:1
PE2-RACK1(config-vrf)#router bgp 65001
PE2-RACK1(config-router)# no bgp default ipv4-unicast
PE2-RACK1(config-router)# bgp log-neighbor-changes
PE2-RACK1(config-router)# neighbor 10.1.1.254 remote-as 65001
PE2-RACK1(config-router)# neighbor 10.1.1.254 update-source Loopback0
PE2-RACK1(config-router)# address-family vpnv4
PE2-RACK1(config-router-af)# neighbor 10.1.1.254 activate
PE2-RACK1(config-router-af)# neighbor 10.1.1.254 send-community extended
PE2-RACK1(config-router-af)# exit-address-family
PE2-RACK1(config-router)# address-family ipv4 vrf iementor
PE2-RACK1(config-router-af)# redistribute connected
PE2-RACK1(config-router-af)# neighbor 10.82.1.1 remote-as 8

PE2-RACK1(config-router-af)# neighbor 10.82.1.1 activate
PE2-RACK1(config-router-af)# no auto-summary

14

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ieMentor CCIE™ Service Provider Workbook v1.0

|

Lab17 Solutions: Basic Traffic Engineering

PE2-RACK1(config-router-af)# no synchronization
PE2-RACK1(config-router-af)# exit-address-family
PE3-RACK1(config)#ip vrf iementor
PE3-RACK1(config-vrf)# rd 1:1
PE3-RACK1(config-vrf)# route-target export 1:1
PE3-RACK1(config-vrf)# route-target import 1:1
PE3-RACK1(config-vrf)#router bgp 65001
PE3-RACK1(config-router)# no synchronization
PE3-RACK1(config-router)# bgp log-neighbor-changes
PE3-RACK1(config-router)# neighbor 10.1.1.254 remote-as 65001
PE3-RACK1(config-router)# neighbor 10.1.1.254 update-source Loopback0
PE3-RACK1(config-router)# no auto-summary
PE3-RACK1(config-router)# address-family vpnv4
PE3-RACK1(config-router-af)# neighbor 10.1.1.254 activate
PE3-RACK1(config-router-af)# neighbor 10.1.1.254 send-community extended

PE3-RACK1(config-router-af)# exit-address-family
PE3-RACK1(config-router)# address-family ipv4 vrf solaris
PE3-RACK1(config-router-af)# redistribute connected metric 2
PE3-RACK1(config-router-af)# redistribute eigrp 100 metric 2
PE3-RACK1(config-router-af)# no auto-summary
PE3-RACK1(config-router-af)# no synchronization
PE3-RACK1(config-router-af)# exit-address-family
PE3-RACK1(config-router)# address-family ipv4 vrf iementor
PE3-RACK1(config-router-af)# redistribute connected
PE3-RACK1(config-router-af)# neighbor 10.13.1.1 remote-as 1
PE3-RACK1(config-router-af)# neighbor 10.13.1.1 activate
PE3-RACK1(config-router-af)# no auto-summary
PE3-RACK1(config-router-af)# no synchronization
PE3-RACK1(config-router-af)# exit-address-family
CE1-RACK1# ping 8.8.8.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/6/8 ms

Task 17.4: Provision SP2 PE4 to participate in future traffic
engineering deployment for OSPF.
PE4-RACK1(config)#router ospf 100
PE4-RACK1(config-router)# mpls traffic-eng area 0
PE4-RACK1(config-router)# mpls traffic-eng router-id Loopback0

15

This product is individually licensed.
Copyright® 2005 ieMentor .