Ethernet Over Multiprotocol Label Switching

Ethernet over Multiprotocol Label Switching © 2001, Cisco Systems, Inc.

Objectives Upon completing this lesson, you will be able to: • Configure EoMPLS on the 7600 • Monitor and troubleshoot EoMPLS on the 7600 platform

© 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-2

Ethernet over MPLS

© 2001, Cisco Systems, Inc.

MPLS v1.0—5-3

Service Provider Market Opportunity Positioning: • Small businesses to Fortune 500 customers • Private network “metro” requirements – Transparent LAN services – IP services • Ease of provisioning

© 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-4

Functional Characteristics EoMPLS provides service providers: • Layer 2 and Layer 3 provisioning flexibility • Function: – No Layer 2 destination MAC address lookup – No Layer 2 address learning • Similar to Frame Relay: – VC-based • FIB table prebuilt • Originally based on Martini drafts • Moving towards Vkompella draft

© 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-5

EoMPLS Services • It has per-customer dedicated physical ports. • It has multiple EoMPLS VCs per physical port. • EoMPLS VCs are point-to-point and based on Martini drafts. • EoMPLS is moving towards point-to-multipoint, based on the Vkompella draft. • Each EoMPLS VC traverses the same LSP. • LER determines FEC, so other MPLS routers have no knowledge of the Layer 2 transport VCs.

© 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-6

Technical Requirements • Label imposition/disposition – Imposition: PE router that translates Layer 2 PDUs into MPLS labels – Disposition: PE router that translates MPLS labels to layer 2 PDUs

© 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-7

Technical Requirements (cont.) • CoS mapping – QOS based on 3-bit EXP field – EXP bits set in both tunnel VC and tunnel labels – Tunnel label popped at PHP router – Static EXP bits (CAR, MQC) – Dynamic EXP bits (IP Precedence, DSCP, 802.1q/802.1p)

© 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-8

MPLS VC Setup

Targeted LDP Session PE1

Company X

P1

P2

P3

PE2 Company X

• PE1 starts a remote directed LDP session with PE2. • PE1 allocates a local VC label and binds it to the VC ID configured under the ingress interface. © 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-9

MPLS VC Setup (cont.) VC Label Mapping

1

VC Label Mapping

2

PE1

P1

P2

P3

Company X

PE2 Company X

• PE1 sends PE2 a label mapping message for the VC label. • PE2 replies with label mapping message including VC label. • The process is unidirectional.

© 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-10

EoMPLS Configuration Tasks Mandatory: • Define VLAN and Loopback interfaces • Enable LDP discovery through targeted hellos • Layer 2 transport routing command

Optional: • MPLS router ID (advisable) • CoS to MPLS EXP mapping • Targeted hello access list © 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-11

EoMPLS Configuration Commands Router(config-if)#

tag-switching ip

• Specify MPLS cloud ingress interface of PE to run MPLS. Router(config)#

mpls label protocol ldp

• Specify PE router to run LDP (default operation is TDP).

© 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-12

EoMPLS Configuration Commands (cont.) Router(config)#

mpls ldp router-id loopback0

• Specify MPLS router ID. Router(config)#

mpls ldp discovery targeted-hello accept from vlanedge-acl

• Configure PE router to accept a targeted LDP hello.

© 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-13

EoMPLS Configuration Commands (cont.)

Router(config-if)#

mpls l2transport route destination vc-id

• Create a Level 2 transport host route to the destination PE. Level 2 transport is unidirectional.

© 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-14

EoMPLS Example

mpls label protocol ldp ! interface Loopback0 ip address 10.1.1.1 255.255.255.255

! interface Vlan25 no ip address mpls l2transport route 10.1.1.2 50 !

!

interface Vlan60

interface GigabitEthernet4/1

no ip address

ip address 10.4.1.2 255.255.0.0

mpls l2transport route 10.1.1.2 1021

no negotiation auto

!

tag-switching ip © 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-15

EoMPLS Show Commands Line card show commands router# show mpls l2transport [imposition | disposition] [detailed] [[ | ] ]

Control plane show commands router# show mpls l2transport vc [detailed] [[ | ] ] show mpls l2transport summary

© 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-16

EoMPLS Debug Commands • Debug control of traffic transported between Layer 2 VLAN and MPLS. router#

debug mpls l2transport vlan control

• Debug label imposition and disposition. router#

debug mpls l2transport vlan distributed

© 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-17

Any Transport over MPLS • It provides the ability to transport Layer 2 traffic across packet networks. • It is a scalable architecture based on label stacking—allows muxing of connections. • A standards-based open architecture allows extensibility to many transport types.

© 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-18

Summary After completing this lesson, you will be able to: • Configure EoMPLS on the 7600 • Monitor and troubleshoot EoMPLS on the 7600 platform

© 2001, Cisco Systems, Inc.

SPMAP v1.0—Module 10-19