Date post: | 05-Apr-2018 |
Category: |
Documents |
Upload: | anand-srivastava |
View: | 228 times |
Download: | 0 times |
of 14
8/2/2019 MPLS Overview 0909
1/14
MPLS on ISAM
Sven Ooghe
20 September 2009
8/2/2019 MPLS Overview 0909
2/14
All Rights Reserved Alcatel-Lucent 20092 | MPLS on ISAM | August 2009
Features
Evolve ISAM to support MPLS forwarding with NANT-D
ISAM acts as an MPLS Label Edge Router / Provider Edge
MPLS data plane and Pseudowire support
Virtual Leased Lines
Virtual Private LAN Service
MPLS control plane for automatic connection setup
Label Distribution Protocol (LDP) to establish MPLS tunnels
Targeted LDP (T-LDP) to establish Pseudowires (PW)
OSPF routing protocol distribution of IP addresses used for (T-)LDP
MPLS OAM for troubleshooting
Virtual Circuit Connectivity Verification (VCCV)
LSP ping / traceroute
8/2/2019 MPLS Overview 0909
3/14
All Rights Reserved Alcatel-Lucent 20093 | MPLS on ISAM | August 2009
8/2/2019 MPLS Overview 0909
4/14
All Rights Reserved Alcatel-Lucent 20094 | MPLS on ISAM | August 2009
8/2/2019 MPLS Overview 0909
5/14
All Rights Reserved Alcatel-Lucent 20095 | MPLS on ISAM | August 2009
Key benefits
Note: MPLS functionality will be added in the ISAM in different stages
1
2
3
4
Flexible support for residential & business servicesVirtual Leased Lines / Virtual Private LAN Service
Business customers can use dual VLAN tagged Ethernet framesAllows for local user-to-user communication
Simpler network designUnified forwarding model for Access + AggregationSame forwarding model for residential and business customers
Same QoS and IGMP / multicast approach across the entire network
Lower OPEXFaster subscriber provisioning: no need to configure aggregation nodes per subscriber
Faster troubleshooting: end-to-end MPLS OAM
MPLS load balancing: no need to configure Multiple STP instances
Standards-based redundancyOpportunity of faster failure detection and recovery times
No need for non-standards protection mechanisms (e.g. multi-chassis link aggregation)
8/2/2019 MPLS Overview 0909
6/14
All Rights Reserved Alcatel-Lucent 20096 | MPLS on ISAM | August 2009
MPLS: Terminology and basic operation
Multi Protocol Label Switching, MPLS
Allows the network operator to create end-to-end Label Switched Paths (LSPs)
No need for hop-by-hop IP routing => removes limitations of traditional routing
LER LERLSR
LSR
LSR
LSR
LER: Label Edge Router
LSR: Label Switch Router
LSP 1
LSP 2Push label Pop label
Swap labelSwap label
LABEL SWITCHING
data datadatalabel datalabel datalabel
Label Switched Path
Simpler1
8/2/2019 MPLS Overview 0909
7/14All Rights Reserved Alcatel-Lucent 2009
7 | MPLS on ISAM | August 2009
Unified forwarding model for Access + Aggregation
Today: VLAN access + MPLS aggregation
Triple Play Service Delivery Architecture
(TPSDA)
Requires knowledge on two networking
paradigms
Configuration burden
Harder to troubleshoot
Target: MPLS end-to-end
used in the new TPSDA 2.0 IPTV solution
Same forwarding across access + aggregation
Same QoS and IGMP / multicast approach
across the entire network
Simpler to manage
Simpler1
VLAN bridging
/ cross-connect
VLAN AccessNetwork
MPLS AggregationNetwork Edge
MPLS Label
Edge Router
MPLS Access + Aggregation Edge
MPLS LabelEdge Router MPLS Label Switch Router / VPLS
/ Pseudowire Switch
8/2/2019 MPLS Overview 0909
8/14All Rights Reserved Alcatel-Lucent 2009
8 | MPLS on ISAM | August 2009
MPLS Applications - Virtual Leased Line
Virtual Leased Line / Virtual Private Wire Service (VPWS) / E-pipe point-to-point tunnel carrying Ethernet Pseudowire (PW) (RFC 4448) PW established on the Access Node => simpler network design
Transparent to the subscribers data and protocols
Service provider can apply QoS, ingress/egress filtering, policing / shaping
Pseudowire can be signaled using Targeted LDP (T-LDP) (RFC 4447)
VLL
Ethernet
Pseudowire
VLL
Attachmentcircuit
Label SwitchRouter
Access Node(Label Edge
Router)
Label EdgeRouter
Flexible2
8/2/2019 MPLS Overview 0909
9/14All Rights Reserved Alcatel-Lucent 2009
9 | MPLS on ISAM | August 2009
MPLS Applications - Virtual Private LAN Service (VPLS)
VPLS / E-LAN
Multipoint-to-multipoint Ethernet service
From customers perspective it looks as if all sites are connected to a single
switched VLAN
MAC learning in LERs with independent forwarding per VPLS instance
Enables local user-to-user communication
PE routers inter-connected using MPLS tunnels
VPLS
Ethernet
Pseudowires
VPLS
Attachmentcircuit
Label SwitchRouterAccess Node
(Label EdgeRouter)
Label EdgeRouter
VPLS
Access Node(Label Edge
Router)
Flexible2
local user-to-usercommunication
8/2/2019 MPLS Overview 0909
10/14
All Rights Reserved Alcatel-Lucent 200910 | MPLS on ISAM | August 2009
OAM troubleshooting tools
LSP Ping (RFC 4379) is the MPLS LSP tunnel working in
each direction?
In-band data plane OAM
LSP Traceroute how do the packets get to their
destination?
Hop-by-hop OAM (per transit LSR)
Virtual circuit connectivity verification(VCCV)
In-band VLL connectivity check (=>
LSP ping for VLLs)
Uses a dedicated channel on a PW totest connectivity
Tunnel LSP
VLL
VPLS
Access
Node IP/MPLS Router IP/MPLS RouterLSP Ping /Traceroute
LSP Ping /Traceroute
VPLS
LSP Ping / Traceroute
VCCV
Lower OPEX3
8/2/2019 MPLS Overview 0909
11/14
All Rights Reserved Alcatel-Lucent 200911 | MPLS on ISAM | August 2009
Redundancy and network protection
Link or node failure between Access Node
and the LER
Switch to backup LSP that connects to
the same Label Edge Router
Node failure of the LER
Switch to a backup LER, using a
standby PW
T-LDP Notification message sent fromISAM to the backup LER that
terminates the standby PW
Redundancy4
LSRPW1 sent over LSP1
I-Bridge
VPLS
VPLSLSR
PW2 sent over LSP2
LSR
LSRPW sent over LSP1
I-BridgeVPLS
SwitchoverSwitchover
8/2/2019 MPLS Overview 0909
12/14
All Rights Reserved Alcatel-Lucent 200912 | MPLS on ISAM | August 2009
www.alcatel-lucent.com
8/2/2019 MPLS Overview 0909
13/14
All Rights Reserved Alcatel-Lucent 200913 | MPLS on ISAM | August 2009
8/2/2019 MPLS Overview 0909
14/14
All Rights Reserved Alcatel-Lucent 200914 | MPLS on ISAM | August 2009