Planning and Engineering — Network Design

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Planning and Engineering — Network Design Nortel Ethernet Routing Switch 8600 Planning and Engineering — Network Design Release: 5.1 Document Revision: 02.02 www.nortel.com NN46205-200 Nortel Ethernet Routing Switch 8600 Release: 5.1 Publication: NN46205-200 Document release date: 27 August 2010 Copyright © 2008-2009 Nortel Networks All Rights Reserved. LEGAL NOTICE While the information in this document is believed to be accurate and reliable, except as otherwise expressly agreed to in writing NORTEL PROVIDES THIS DOCUMENT "AS IS" WITHOUT WARRANTY OR CONDITION OF ANY KIND, EITHER EXPRESS OR IMPLIED. The information and/or products described in this document are subject to change without notice. THE SOFTWARE DESCRIBED IN THIS DOCUMENT IS FURNISHED UNDER A LICENSE AGREEMENT AND MAY BE USED ONLY IN ACCORDANCE WITH THE TERMS OF THAT LICENSE. Nortel, the Nortel logo, the Globemark, and Contivity are trademarks of Nortel Networks. Cisco is a trademark of Cisco Systems, Inc. Juniper is a trademark of Juniper Networks, Inc. Linux is a trademark of Linus Torvalds. Microsoft, Windows, and Windows NT are trademarks of Microsoft Corporation. NetWare is a registered trademark of Novell, Inc. Sygate is a trademark of Sygate Technologies, Inc. SynOptics is a trademark of SynOptics Communications, Inc. UNIX is a trademark of The Open Group. All other trademarks are the property of their respective owners. 3 Contents Safety messages 11 Notices 11 Attention notice 11 Caution ESD notice 11 Caution notice 12 Software license 15 New in this release 19 Features 19 DWDM XFPs 19 HA feature support and synchronization information 19 MinLink for LACP 19 Bidirectional Forwarding Detection 19 Multicast and VRF-lite 19 IGMPv3 backward compatibility 20 MSDP 20 Static mroute 20 TACACS+ 20 Other changes 20 R series modules and global FDB filters 20 Supported scaling capabilities 20 SMLT full-mesh recommendations 20 VLACP information consolidation 20 SLPP and Extended CP-Limit information consolidation 20 MPLS IP VPN and IP VPN Lite 21 Introduction 23 Network design fundamentals 25 Hardware fundamentals and guidelines 27 Chassis considerations 27 Chassis power considerations 27 Power supply circuit requirements 28 Chassis cooling 29 Nortel Ethernet Routing Switch 8600 Planning and Engineering — Network Design NN46205-200 02.02 27 August 2010 Copyright © 2008-2009 Nortel Networks 4 Modules 30 SF/CPU modules 30 RS module 31 R modules 33 Classic modules 37 Modules, operational modes, features, and scaling 38 Optical device guidelines 44 Optical power considerations 44 10 GbE WAN module optical interoperability 45 1000BASE-X and 10GBASE-X reach 45 XFPs and dispersion considerations 45 10/100BASE-X and 1000BASE-TX reach 47 10/100BASE-TX Auto-Negotiation recommendations 48 CANA 49 FEFI and remote fault indication 49 Control plane rate limit (CP-Limit) 49 Extended CP-Limit 50 Optical routing design 55 Optical routing system components 55 Multiplexer applications 58 OADM ring 59 Optical multiplexer in a point-to-point application 60 OMUX in a ring 61 Transmission distance 61 Reach and optical link budget 61 Reach calculation examples 62 DWDM XFPs 68 Software considerations 71 Operational modes 71 Enhanced operational mode 72 Redundant network design 75 Physical layer redundancy 75 100BASE-FX FEFI recommendations 75 Gigabit Ethernet and remote fault indication 76 SFFD recommendations 76 End-to-end fault detection and VLACP 77 Platform redundancy 82 High Availability mode 83 Link redundancy 87 Link redundancy navigation 87 Multilink Trunking 88 802.3ad-based link aggregation 91 Nortel Ethernet Routing Switch 8600 Planning and Engineering — Network Design NN46205-200 02.02 27 August 2010 Copyright © 2008-2009 Nortel Networks 5 Bidirectional Forwarding Detection 95 Multihoming 96 Network redundancy 97 Modular network design for redundant networks 97 Network edge redundancy 101 Split Multi-Link Trunking 102 SMLT full-mesh recommendations with OSPF 114 Routed SMLT 115 Switch clustering topologies and interoperability with other products 120 sVLANs 121 Overview 121 sVLAN recommendations 122 sVLAN MAC address learning 122 Management sVLAN 123 sVLAN restrictions 123 ATM guidelines 125 ATM scalability 125 ATM performance 126 ATM resiliency 126 F5 OAM loopback request/reply 127 ATM considerations 128 ATM and MLT 129 ATM and 802.1q tags 129 ATM and DiffServ 129 ATM and IP multicast 129 ATM traffic shaping 130 ATM and ingress port mirroring 130 ATM applications 130 ATM WAN connectivity and OE/ATM interworking 131 Transparent LAN services 136 Video over DSL over ATM 138 ATM and voice traffic recommendations 138 Layer 2 loop prevention 141 Spanning tree 141 Spanning Tree Protocol 141 Per-VLAN Spanning Tree Plus 147 MSTP and RSTP considerations 147 SLPP, Loop Detect, and Extended CP-Limit 148 Simple Loop Prevention Protocol (SLPP) 149 Extended CP-Limit 153 Loop Detect 154 VLACP 155 Nortel Ethernet Routing Switch 8600 Planning and Engineering — Network Design NN46205-200 02.02 27 August 2010 Copyright © 2008-2009 Nortel Networks 6 Loop prevention recommendations 155 SF/CPU protection and loop prevention compatibility 156 Layer 3 network design 157 VRF Lite 157 VRF Lite route redistribution 158 VRF Lite capability and functionality 158 VRF Lite architecture examples 159 Virtual Router Redundancy Protocol 162 VRRP guidelines 163 VRRP and STG 165 VRRP and ICMP redirect messages 167 VRRP versus RSMLT for default gateway resiliency 168 Subnet-based VLAN guidelines 168 PPPoE-based VLAN design example 170 Indirect connections 172 Direct connections 173 Border Gateway Protocol 174 BGP scaling 175 BGP considerations 175 BGP and other vendor interoperability 176 BGP design examples 177 Open Shortest Path First 181 OSPF scaling guidelines 181 OSPF design guidelines 182 OSPF and CPU utilization 183 OSPF network design examples 183 Internetwork Packet Exchange 186 IPX and R series modules 186 IPX and Get Nearest Server 189 IPX and LLC encapsulation and translation 189 IPX RIP and SAP policies 189 IP routed interface scaling 190 Internet Protocol version 6 190 IPv6 requirements 191 IPv6 design recommendations 191 Transition mechanisms for IPv6 191 Dual-stack tunnels 191 Multicast network design 193 General multicast considerations 193 Multicast and VRF-lite 194 Multicast and Multi-Link Trunking considerations 198 Multicast scalability design rules 201 IP multicast address range restrictions 202 Nortel Ethernet Routing Switch 8600 Planning and Engineering — Network Design NN46205-200 02.02 27 August 2010 Copyright © 2008-2009 Nortel Networks 7 Multicast MAC address mapping considerations 203 Dynamic multicast configuration changes 205 IGMPv2 back-down to IGMPv1 205 IGMPv3 backward compatibility 206 TTL in IP multicast packets 206 Multicast MAC filtering 207 Guidelines for multicast access policies 208 Split-subnet and multicast 209 Pragmatic General Multicast guidelines 210 Distance Vector Multicast Routing Protocol guidelines 211 DVMRP scalability 211 DVMRP design guidelines 212 DVMRP timer tuning 213 DVMRP policies 213 DVMRP passive interfaces 218 Protocol Independent Multicast-Sparse Mode guidelines 218 PIM-SM and PIM-SSM scalability 219 PIM general requirements 220 PIM and Shortest Path Tree switchover 223 PIM traffic delay and SMLT peer reboot 224 PIM-SM to DVMRP connection: MBR 224 Circuitless IP for PIM-SM 228 PIM-SM and static RP 229 Rendezvous Point router considerations 231 PIM-SM receivers and VLANs 234 PIM network with nonPIM interfaces 235 Protocol Independent Multicast-Source Specific Multicast guidelines 236 IGMPv3 and PIM-SSM operation 237 PIM-SSM design considerations 237 MSDP 238 Peers 239 MSDP configuration considerations 239 Static mroute 240 DVMRP and PIM comparison 242 Flood and prune versus shared and shortest path trees 242 Unicast routes for PIM versus DMVRP own routes 243 Convergence and timers 243 PIM versus DVMRP shutdown 243 IGMP and routing protocol interactions 243 IGMP and DVMRP interaction 244 IGMP and PIM-SM interaction 245 Multicast and SMLT guidelines 245 Triangle topology multicast guidelines 246 Square and full-mesh topology multicast guidelines 247 Nortel Ethernet Routing Switch 8600 Planning and Engineering — Network Design NN46205-200 02.02 27 August 2010 Copyright © 2008-2009 Nortel Networks 8 SMLT and multicast traffic issues 247 Multicast for multimedia 250 Static routes 251 Join and leave performance 251 Fast Leave 251 Last Member Query Interval tuning 252 Internet Group Membership Authentication Protocol 253 IGAP and MLT 254 MPLS IP VPN and IP VPN Lite 257 MPLS IP VPN 257 MPLS overview 258 Operation of MPLS IP VPN 258 Route distinguishers 261 Route targets 262 IP VPN requirements and recommendations 264 IP VPN deployment scenarios 265 MPLS interoperability 266 MTU and Retry Limit 266 IP VPN Lite 266 IP VPN Lite deployment scenarios 270 Layer 1, 2, and 3 design examples 277 Layer 1 examples 277 Layer 2 examples 282 Layer 3 examples 286 RSMLT redundant network with bridged and routed VLANs in the core 290 The WSM and Layer 4 to 7 services 293 Layer 4 to 7 switching 293 WSM architecture 295 WSM applications and services 297 WSM and local server load balancing 297 WSM and global server load balancing 299 WSM health metrics 300 WSM and application redirection 301 WSM and VLAN filtering 301 WSM and application abuse protection 302 WSM and Layer 7 deny filters 302 WSM network architectures 303 Ethernet Routing Switch 8600 as a Layer 2 switch 303 Layer 3 routing 304 Layer 4 to 7 service implementation with a single Ethernet Routing Switch 8600 305 Layer 4 to 7 service implementation with dual
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