- •Acknowledgments
- •Introduction
- •Assessment Test
- •Answers to Assessment Test
- •Service Provider Networks
- •Scalability
- •Traffic Engineering
- •Quality of Service
- •MPLS Label Stack
- •Shim Header
- •MPLS Architecture
- •Control
- •Forwarding
- •MPLS Label Switching
- •MPLS Network Components
- •Device Output
- •Label-Switched Paths
- •MPLS Applications
- •MPLS and ATM
- •Overlay
- •Quality of Service
- •Traffic Engineering
- •Summary
- •Exam Essentials
- •Key Terms
- •Review Questions
- •Answers to Review Questions
- •Routing Review
- •Frame-Mode MPLS Working Example
- •Network Routing Protocol Examples
- •MPLS Step by Step
- •Label Distribution
- •Assigning Labels
- •Troubleshooting and Verification
- •Device Configuration
- •IGP Verification
- •CEF Verification
- •MPLS Verification
- •Label Distribution and Bindings
- •Binding Verification
- •Troubleshooting the Network
- •Hiding Service Provider Devices
- •Summary
- •Exam Essentials
- •Key Terms
- •Review Questions
- •Answers to Review Questions
- •Frame-Mode MPLS and ATM
- •Frame-Mode MPLS and ATM Configuration
- •Cell-Mode MPLS
- •Label Binding with ATM
- •Cell-Mode Label Switching
- •VC Merge
- •Loop Prevention
- •Cell-Mode MPLS Configuration
- •Summary
- •Exam Essentials
- •Key Terms
- •Review Questions
- •Answers to Review Questions
- •VPNs 101
- •Point-to-Point Connections
- •Virtual Private Networks
- •Categories of VPNs
- •VPN Routing
- •Peer-to-Peer VPNs
- •Optimal Routing
- •Peer-to-Peer Security
- •Peer-to-Peer VPN Routing
- •Summary
- •Exam Essentials
- •Key Terms
- •Review Questions
- •Answers to Review Questions
- •Service Provider Configuration
- •MPLS VPNs
- •Virtual Router
- •Virtual Routing and Forwarding Tables
- •MPLS Operational Overview
- •MP-BGP Configuration
- •An MPLS VPN Example
- •Route Distinguisher
- •MP-IBGP Configuration Example
- •Initial Network Configuration
- •MP-IBGP Configuration
- •Verification
- •Summary
- •Exam Essentials
- •Key Terms
- •Review Questions
- •Answers to Review Questions
- •A Review of VPNs
- •Configuring a Simple MPLS VPN
- •Configuring VRF Interfaces
- •Running RIP in an MPLS VPN
- •Configuring RIPv2 with Address-Family ipv4
- •Configuring Redistribution
- •Route Targets
- •Configuring Route Targets
- •A Review of Simple VPN Configuration
- •Configuring MPLS in the Service Provider Network
- •Simple VPN Configuration
- •Configuring the PE-CE Routing Protocol
- •Lab: Configuring an MPLS VPN
- •Configuring POP Routers
- •VPN Configuration
- •Raleigh Running-Config
- •Atlanta Running-Config
- •Peer 1 Running-Config
- •Peer 2 Running-Config
- •Verification with Ping
- •Routing Table Isolation
- •Verifying VRF Routes
- •Summary
- •Exam Essentials
- •Key Terms
- •Review Questions
- •Answers to Review Questions
- •MP-BGP and OSPF
- •A Review of OSPF
- •OSPF Router Types
- •Link State Advertisements
- •OSPF for MPLS VPNs
- •OSPF Super-Backbone
- •Preventing Routing Loops
- •Path Selection
- •MPLS VPN OSPF Lab
- •Summary
- •Exam Essentials
- •Key Terms
- •Review Questions
- •Answers to Review Questions
- •Static Routing
- •Device Configuration
- •VPN Configuration
- •Raleigh Running-Config
- •Atlanta Running-Config
- •Peer Router Configuration
- •Verification with Ping
- •Verifying Static VRF Routes
- •E-BGP and MPLS VPNs
- •Device Configuration
- •E-BGP Operation
- •AS-Override
- •VPN Configuration
- •Raleigh Running-Config
- •Atlanta Running-Config
- •Peer Router Configuration
- •Peer 1 Running-Config
- •Peer 2 Running-Config
- •Verification with Ping
- •Advanced MPLS VPN Topologies
- •Simple VPNs
- •Central Services MPLS VPN Topology
- •Overlay MPLS VPN Topology
- •Summary
- •Exam Essentials
- •Key Terms
- •Review Questions
- •Answers to Review Questions
- •Challenge Lab 1
- •MPLS
- •MP-IBGP
- •Answer to Lab 1.1
- •Answer to Lab 1.2
- •Answer to Lab 1.3
- •Challenge Lab 2
- •Tag Switching
- •MP-IBGP
- •Answer to Lab 2.1
- •Answer to Lab 2.2
- •Answer to Lab 2.3
- •Challenge Lab 3
- •VRF Configuration
- •RIPv2
- •Redistribution
- •Answer to Lab 3.1
- •Answer to Lab 3.2
- •Answer to Lab 3.3
- •Challenge Lab 4
- •VRF Configuration
- •OSPF
- •Redistribution
- •Answer to Lab 4.1
- •Answer to Lab 4.2
- •Answer to Lab 4.3
- •Challenge Lab 5
- •VRF Configuration
- •Static Routes and Redistribution
- •Answer to Lab 5.1
- •Answer to Lab 5.2
- •Challenge Lab 6
- •VRF Configuration
- •E-BGP Configuration
- •Answer to Lab 6.1
- •Answer to Lab 6.2
- •Service Provider Network Configuration with OSPF
- •Router Configuration
- •Routing Tables
- •Tags
- •Service Provider Network Configuration with IS-IS
- •Router Configuration
- •Routing Tables
- •Tag Switching Forwarding Tables
- •Glossary
Chapter 2, “Frame-Mode MPLS,” introduced you to MPLS and tag switching deployment in service provider networks. In Chapter 2,
I used RIPv2 as an IGP for the service provider network. Although RIPv2 works from an instructional standpoint, IS-IS and OSPF are real-world protocols used by service providers. In this appendix, a sample network is configured with BGP between the PE and CE routers. In the first example, OSPF is configured as the service provider IGP. In the second example, IS-IS is configured as the service provider IGP.
Service Provider Network Configuration with OSPF
Figure B.1 illustrates the service provider network you’ll be using in this section.
F I G U R E B . 1 A service provider network to be configured with OSPF
Serial |
0 |
Serial |
0/1 |
Serial |
0/0 |
Serial |
0/1 |
Serial |
0/0 |
Serial |
0/3 |
Serial |
0/1 |
Serial |
0 |
|
|
|
|
|
|
|
|
||||||||
Peer 1 |
|
Atlanta |
|
|
|
Core |
|
|
Raleigh |
|
|
|
Peer 2 |
||
Figure B.2 illustrates the routing protocol utilization for the service provider network illustrated in Figure B.1.
Copyright ©2002 SYBEX, Inc., Alameda, CA |
www.sybex.com |
Service Provider Network Configuration with OSPF 409
F I G U R E B . 2 Network protocol utilization
OSPF
Peer 1 |
Atlanta |
Core |
Raleigh |
Peer 2 |
BGP |
|
|
|
BGP |
AS 65001 |
|
|
|
AS 65002 |
|
|
I-BGP |
|
|
|
|
AS 65000 |
|
|
Table B.1 lists the IP addresses and interfaces of the CE devices in Figure B.1.
T A B L E B . 1 Customer Addressing
Device |
Loopback 0 |
Serial 0 |
|
|
|
Peer 1 |
192.168.1.1/32 |
192.168.3.5/30 |
Peer 2 |
192.168.2.1/32 |
192.168.3.10/30 |
|
|
|
Table B.2 lists the IP addresses and interfaces of the service provider devices in Figure B.1.
T A B L E |
B . 2 Service Provider Addressing |
|
|
|
|
|
|
|
|
Device |
Loopback 0 |
Serial 0/0 |
Serial 0/1 |
Serial 0/3 |
|
|
|
|
|
Atlanta |
204.134.83.1/32 |
204.134.83.5/30 |
192.168.3.6/30 |
N/A |
Core |
204.134.83.2/32 |
204.134.83.9/30 |
204.134.83.6/30 |
N/A |
Raleigh |
204.134.83.3/32 |
N/A |
192.168.3.9/30 |
204.134.83.10/30 |
|
|
|
|
|
Router Configuration
This section shows the configuration of all the network devices. The peer routers run BGP, the Atlanta and Raleigh POP routers run OSPF and BGP, and the Core router runs only OSPF.
Copyright ©2002 SYBEX, Inc., Alameda, CA |
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410 Appendix B Service Provider Tag Switching with OSPF and IS-IS
Peer 1 Router Configuration
On the Peer 1 router, MPLS is not enabled; only standard BGP is enabled.
Peer1#show running-config
Building configuration...
Current configuration : 914 bytes
!
version 12.1
service timestamps debug uptime service timestamps log uptime no service password-encryption
!
hostname Peer1
!
enable password cisco
!
!
!
!
!
ip subnet-zero
ip tcp synwait-time 5 no ip domain-lookup
!
!
!
!
interface Loopback0
ip address 192.168.1.1 255.255.255.255
!
interface Ethernet0 no ip address shutdown
!
Copyright ©2002 SYBEX, Inc., Alameda, CA |
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Service Provider Network Configuration with OSPF 411
interface Serial0
description *** Link to Atlanta POP ***
ip address 192.168.3.5 255.255.255.252 no fair-queue
!
interface Serial1 no ip address shutdown
!
router bgp 65001
no synchronization
bgp log-neighbor-changes redistribute connected
neighbor 192.168.3.6 remote-as 65000 no auto-summary
!
ip classless
no ip http server
!
!
line con 0 exec-timeout 0 0 privilege level 15 logging synchronous transport input none
ip netmask-format decimal line aux 0
line vty 0 4 privilege level 15 password cisco logging synchronous login
ip netmask-format decimal
!
end
Copyright ©2002 SYBEX, Inc., Alameda, CA |
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412 Appendix B Service Provider Tag Switching with OSPF and IS-IS
Atlanta POP Router Configuration
On the Atlanta POP router, standard OPSF is configured as the IGP. I-BGP is set up between the Atlanta and Raleigh POP routers. An E-BGP session is set up between the Atlanta POP router and Peer 1. Tag switching is enabled only on the internal service provider link.
Atlanta#show running-config
Building configuration...
Current configuration : 1572 bytes
!
version 12.1
service timestamps debug uptime service timestamps log uptime no service password-encryption
!
hostname Atlanta
!
enable password cisco
!
!
!
!
!
memory-size iomem 25 ip subnet-zero
ip tcp synwait-time 5 no ip domain-lookup
!
ip cef
cns event-service server
!
!
!
!
!
Copyright ©2002 SYBEX, Inc., Alameda, CA |
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Service Provider Network Configuration with OSPF 413
interface Loopback0
ip address 204.134.83.1 255.255.255.255
!
interface Serial0/0
description *** Link to Core Router ***
ip address 204.134.83.5 255.255.255.252 tag-switching ip
no fair-queue clockrate 64000
!
interface Serial0/1
description *** Link to Peer1 ***
ip address 192.168.3.6 255.255.255.252 clockrate 64000
!
interface Serial0/2 no ip address shutdown
clockrate 64000
!
interface Serial0/3 no ip address shutdown
clockrate 64000
!
interface Ethernet1/0 no ip address shutdown
!
interface Ethernet1/1 no ip address shutdown
!
interface Ethernet1/2 no ip address shutdown
!
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414 Appendix B Service Provider Tag Switching with OSPF and IS-IS
interface Ethernet1/3 no ip address shutdown
!
router ospf 1 log-adjacency-changes
network 204.134.83.1 0.0.0.0 area 0 network 204.134.83.5 0.0.0.0 area 0
!
router bgp 65000
no synchronization
bgp log-neighbor-changes
neighbor 192.168.3.5 remote-as 65001 neighbor 204.134.83.3 remote-as 65000
neighbor 204.134.83.3 update-source Loopback0 neighbor 204.134.83.3 next-hop-self
no auto-summary
!
ip classless
no ip http server
!
!
!
line con 0 exec-timeout 0 0 privilege level 15 logging synchronous transport input none
ip netmask-format decimal line aux 0
line vty 0 4 privilege level 15 password cisco logging synchronous login
ip netmask-format decimal
!
end
Copyright ©2002 SYBEX, Inc., Alameda, CA |
www.sybex.com |
Service Provider Network Configuration with OSPF 415
Core Router Configuration
On the Core router, standard OPSF is configured as the IGP. Tag switching is enabled on the two service provider links.
Core#show running-config
Building configuration...
Current configuration : 1353 bytes
!
version 12.1
service timestamps debug uptime service timestamps log uptime no service password-encryption
!
hostname Core
!
enable password cisco
!
!
!
!
!
memory-size iomem 25 ip subnet-zero
ip tcp synwait-time 5 no ip domain-lookup
!
ip cef
cns event-service server
!
!
!
!
!
interface Loopback0
ip address 204.134.83.2 255.255.255.255
!
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416 Appendix B Service Provider Tag Switching with OSPF and IS-IS
interface Serial0/0
description *** Connection to Raleigh POP ***
ip address 204.134.83.9 255.255.255.252 tag-switching ip
no fair-queue
!
interface Serial0/1
description *** Connection to Atlanta POP ***
ip address 204.134.83.6 255.255.255.252 tag-switching ip
!
interface Serial0/2 no ip address shutdown
!
interface Serial0/3 no ip address shutdown
!
interface Ethernet1/0 no ip address shutdown
!
interface Ethernet1/1 no ip address shutdown
!
interface Ethernet1/2 no ip address shutdown
!
interface Ethernet1/3 no ip address shutdown
!
Copyright ©2002 SYBEX, Inc., Alameda, CA |
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Service Provider Network Configuration with OSPF 417
router ospf 1 log-adjacency-changes
network 204.134.83.2 0.0.0.0 area 0 network 204.134.83.6 0.0.0.0 area 0 network 204.134.83.9 0.0.0.0 area 0
!
ip classless
no ip http server
!
!
!
line con 0 exec-timeout 0 0 privilege level 15 logging synchronous transport input none
ip netmask-format decimal line aux 0
line vty 0 4 privilege level 15 password cisco logging synchronous login
ip netmask-format decimal
!
end
Raleigh POP Router Configuration
On the Raleigh POP router, standard OPSF is configured as the IGP. I-BGP is set up between the Raleigh and Atlanta POP routers. An E-BGP session is set up between the Raleigh POP and Peer2. Tag switching is enabled only on the internal service provider link.
Raleigh#show running-config
Building configuration...
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418 Appendix B Service Provider Tag Switching with OSPF and IS-IS
Current configuration : 1599 bytes
!
version 12.1
service timestamps debug uptime service timestamps log uptime no service password-encryption
!
hostname Raleigh
!
enable password cisco
!
!
!
!
!
memory-size iomem 25 ip subnet-zero
ip tcp synwait-time 5 no ip domain-lookup
!
ip cef
cns event-service server
!
!
!
!
!
interface Loopback0
ip address 204.134.83.3 255.255.255.255
!
interface Serial0/0 no ip address shutdown
no fair-queue clockrate 64000
!
Copyright ©2002 SYBEX, Inc., Alameda, CA |
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Service Provider Network Configuration with OSPF 419
interface Serial0/1
description *** Link to Peer2 ***
ip address 192.168.3.9 255.255.255.252 clockrate 64000
!
interface Serial0/2 no ip address shutdown
clockrate 64000
!
interface Serial0/3
description *** Link to Core Router ***
ip address 204.134.83.10 255.255.255.252 tag-switching ip
clockrate 64000
!
interface Ethernet1/0 no ip address shutdown
!
interface Ethernet1/1 no ip address shutdown
!
interface Ethernet1/2 no ip address shutdown
!
interface Ethernet1/3 no ip address shutdown
!
router ospf 1 log-adjacency-changes
network 204.134.83.3 0.0.0.0 area 0 network 204.134.83.10 0.0.0.0 area 0
!
Copyright ©2002 SYBEX, Inc., Alameda, CA |
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420 Appendix B Service Provider Tag Switching with OSPF and IS-IS
router bgp 65000
no synchronization
bgp log-neighbor-changes
neighbor 192.168.3.10 remote-as 65002 neighbor 204.134.83.1 remote-as 65000 neighbor 204.134.83.1 update-source Loopback0 neighbor 204.134.83.1 next-hop-self
no auto-summary
!
ip classless
no ip http server
!
!
!
line con 0 exec-timeout 0 0 privilege level 15 logging synchronous transport input none
ip netmask-format decimal line aux 0
line vty 0 4 privilege level 15 password cisco logging synchronous login
ip netmask-format decimal
!
end
Peer 2 Router Configuration
On the Peer 2 router, MPLS is not enabled; only standard BGP is enabled.
Peer2#show running-config
Building configuration...
Copyright ©2002 SYBEX, Inc., Alameda, CA |
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Service Provider Network Configuration with OSPF 421
Current configuration : 951 bytes
!
version 12.1
service timestamps debug uptime service timestamps log uptime no service password-encryption
!
hostname Peer2
!
enable password cisco
!
!
!
!
!
ip subnet-zero
ip tcp synwait-time 5 no ip domain-lookup
!
!
!
!
interface Loopback0
ip address 192.168.2.1 255.255.255.255
!
interface Ethernet0 no ip address shutdown
!
interface Serial0
description *** Link to Raleigh POP ***
ip address 192.168.3.10 255.255.255.252 no fair-queue
!
interface Serial1 no ip address shutdown
!
Copyright ©2002 SYBEX, Inc., Alameda, CA |
www.sybex.com |