NN46250-200_04_01_Planning-And-Engineering-Network-Design.pdf - Planning and Engineering \u2014 Network Design Avaya Virtual Services Platform 9000 3.3

NN46250-200_04_01_Planning-And-Engineering-Network-Design.pdf

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Unformatted text preview: Planning and Engineering — Network Design Avaya Virtual Services Platform 9000 3.3 NN46250-200, 04.01 May 2012 © 2012 Avaya Inc. Copyright All Rights Reserved. Except where expressly stated otherwise, no use should be made of materials on this site, the Documentation, Software, or Hardware provided by Avaya. All content on this site, the documentation and the Product provided by Avaya including the selection, arrangement and design of the content is owned either by Avaya or its licensors and is protected by copyright and other intellectual property laws including the sui generis rights relating to the protection of databases. You may not modify, copy, reproduce, republish, upload, post, transmit or distribute in any way any content, in whole or in part, including any code and software unless expressly authorized by Avaya. 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For additional support telephone numbers, see the Avaya Web site: . 2 Planning and Engineering — Network Design Comments? [email protected] May 2012 Contents Chapter 1: Purpose of this document............................................................................... 7 Chapter 2: New in this release........................................................................................... 9 Features.................................................................................................................................................... 9 Other changes........................................................................................................................................... 9 Chapter 3: Network design fundamentals........................................................................ 11 Chapter 4: Hardware fundamentals and guidelines........................................................ 13 Chassis considerations............................................................................................................................. 13 Modules..................................................................................................................................................... 14 Optical device guidelines.......................................................................................................................... 15 1000BASE-X and 10GBASE-X reach....................................................................................................... 16 Dispersion considerations for long reach.................................................................................................. 16 10/100BASE-X and 1000BASE-TX reach................................................................................................ 17 10/100/1000BASE-TX Auto-Negotiation recommendations..................................................................... 18 Auto MDIX................................................................................................................................................. 18 CANA........................................................................................................................................................ 19 Chapter 5: Platform redundancy....................................................................................... 21 Power redundancy.................................................................................................................................... 21 Input/output port redundancy.................................................................................................................... 21 Control plane redundancy......................................................................................................................... 22 Switch Fabric redundancy......................................................................................................................... 22 Configuration redundancy......................................................................................................................... 23 Link redundancy........................................................................................................................................ 23 Switch redundancy.................................................................................................................................... 23 High Availability mode............................................................................................................................... 23 Chapter 6: Link redundancy............................................................................................... 27 Physical layer redundancy........................................................................................................................ 27 Multilink Trunking...................................................................................................................................... 31 802.3ad-based link aggregation................................................................................................................ 32 Chapter 7: Redundant network design............................................................................. 35 Network Load Balancing........................................................................................................................... 35 Chapter 8: Lossless networks........................................................................................... 39 Chapter 9: Layer 2 switch clustering and SMLT.............................................................. 49 Modular design for redundant networks.................................................................................................... 49 Network edge redundancy........................................................................................................................ 53 Split MultiLink Trunk configuration............................................................................................................ 54 SMLT full-mesh recommendations with OSPF......................................................................................... 63 Chapter 10: Layer 3 switch clustering and RSMLT.......................................................... 65 Routed SMLT............................................................................................................................................ 65 Switch clustering topologies and interoperability with other products....................................................... 72 Chapter 11: Layer 3 switch clustering and multicast SMLT............................................ 75 General guidelines.................................................................................................................................... 75 Multicast triangle topology......................................................................................................................... 77 Square and full-mesh topology multicast guidelines................................................................................. 79 SMLT and multicast traffic issues.............................................................................................................. 82 Planning and Engineering — Network Design May 2012 3 Chapter 12: Layer 2 loop prevention................................................................................. 85 Loop prevention and detection.................................................................................................................. 85 CPU protection and loop prevention compatibility.................................................................................... 90 Chapter 13: Spanning tree................................................................................................. 91 Spanning tree and protection against isolated VLANs.............................................................................. 91 MSTP and RSTP considerations.............................................................................................................. 92 Chapter 14: Layer 3 network design................................................................................. 95 VRF Lite.................................................................................................................................................... 95 Subnet-based VLAN guidelines................................................................................................................ 107 Open Shortest Path First........................................................................................................................... 107 Border Gateway Protocol.......................................................................................................................... 112 IPv6 BGP+........................................................................................................................................ 118 IP routed interface scaling......................................................................................................................... 118 IPv6........................................................................................................................................................... 119 Chapter 15: SPBM design guidelines................................................................................ 123 802.1aq standard...................................................................................................................................... 123 Provisioning............................................................................................................................................... 125 Implementation options............................................................................................................................. 126 Reference architectures............................................................................................................................ 132 Best practices............................................................................................................................................ 143 Migration best practices............................................................................................................................ 145 SPBM restrictions and limitations.............................................................................................................. 147 Chapter 16: IP multicast network design.......................................................................... 151 Multicast and MultiLink Trunking considerations....................................................................................... 151 Multicast scalability design rules............................................................................................................... 151 IP multicast address range restrictions..................................................................................................... 153 Multicast MAC address mapping considerations...................................................................................... 154 Dynamic multicast configuration changes................................................................................................. 156 IGMPv3 backward compatibility................................................................................................................ 156 TTL in IP multicast packets....................................................................................................................... 157 Multicast MAC filtering.............................................................................................................................. 157 Guidelines for multicast access policies.................................................................................................... 158 Split-subnet and multicast......................................................................................................................... 158 Protocol Independent Multicast-Sparse Mode guidelines......................................................................... 159 Protocol Independent Multicast-Source Specific Multicast guidelines...................................................... 171 IGMP and PIM-SM interaction.................................................................................................................. 172 Layer 3 multicast extended VLANs........................................................................................................... 172 Multicast for multimedia............................................................................................................................ 175 Chapter 17: System and network stability and security.................................................. 177 Control plane rate limit (CP-Limit)............................................................................................................. 177 DoS protection mechanisms..................................................................................................................... 178 Damage prevention................................................................................................................................... 179 Security and redundancy.......................................................................................................................... 181 Data plane security................................................................................................................................... 181 Control plane security............................................................................................................................... 185 Additional information................................................................................................................................ 191 Chapter 18: QoS design guidelines................................................................................... 193 4 Planning and Engineering — Network Design May 2012 QoS mechanisms...................................................................................................................................... 193 QoS interface considerations.................................................................................................................... 196 Network congestion and QoS design........................................................................................................ 198 QoS examples and recommendations...................................................................................................... 199 Chapter 19: Layer 1, 2, and 3 design examples............................................................... 203 Layer 1 examples...................................................................................................................................... 203 Layer 2 e...
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