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

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. Unauthorized reproduction, transmission, dissemination, storage, and or use without the express written consent of Avaya can be a criminal, as well as a civil offense under the applicable law. Notice While reasonable efforts have been made to ensure that the information in this document is complete and accurate at the time of printing, Avaya assumes no liability for any errors. Avaya reserves the right to make changes and corrections to the information in this document without the obligation to notify any person or organization of such changes. Documentation disclaimer “Documentation” means information published by Avaya in varying mediums which may include product information, operating instructions and performance specifications that Avaya generally makes available to users of its products. Documentation does not include marketing materials. Avaya shall not be responsible for any modifications, additions, or deletions to the original published version of documentation unless such modifications, additions, or deletions were performed by Avaya. End User agrees to indemnify and hold harmless Avaya, Avaya's agents, servants and employees against all claims, lawsuits, demands and judgments arising out of, or in connection with, subsequent modifications, additions or deletions to this documentation, to the extent made by End User. Third-party components Certain software programs or portions thereof included in the Product may contain software distributed under third party agreements (“Third Party Components”), which may contain terms that expand or limit rights to use certain portions of the Product (“Third Party Terms”). Information regarding distributed Linux OS source code (for those Products that have distributed the Linux OS source code), and identifying the copyright holders of the Third Party Components and the Third Party Terms that apply to them is available on the Avaya Support Web site: . Link disclaimer Trademarks Avaya is not responsible for the contents or reliability of any linked Web sites referenced within this site or documentation provided by Avaya. Avaya is not responsible for the accuracy of any information, statement or content provided on these sites and does not necessarily endorse the products, services, or information described or offered within them. Avaya does not guarantee that these links will work all the time and has no control over the availability of the linked pages. The trademarks, logos and service marks (“Marks”) displayed in this site, the Documentation and Product(s) provided by Avaya are the registered or unregistered Marks of Avaya, its affiliates, or other third parties. Users are not permitted to use such Marks without prior written consent from Avaya or such third party which may own the Mark. Nothing contained in this site, the Documentation and Product(s) should be construed as granting, by implication, estoppel, or otherwise, any license or right in and to the Marks without the express written permission of Avaya or the applicable third party. Warranty Avaya provides a limited warranty on its Hardware and Software (“Product(s)”). Refer to your sales agreement to establish the terms of the limited warranty. In addition, Avaya’s standard warranty language, as well as information regarding support for this Product while under warranty is available to Avaya customers and other parties through the Avaya Support Web site: . Please note that if you acquired the Product(s) from an authorized Avaya reseller outside of the United States and Canada, the warranty is provided to you by said Avaya reseller and not by Avaya. Avaya is a registered trademark of Avaya Inc. All non-Avaya trademarks are the property of their respective owners, and “Linux” is a registered trademark of Linus Torvalds. Downloading Documentation For the most current versions of Documentation, see the Avaya Support Web site: . Licenses Contact Avaya Support THE SOFTWARE LICENSE TERMS AVAILABLE ON THE AVAYA WEBSITE, ARE APPLICABLE TO ANYONE WHO DOWNLOADS, USES AND/OR INSTALLS AVAYA SOFTWARE, PURCHASED FROM AVAYA INC., ANY AVAYA AFFILIATE, OR AN AUTHORIZED AVAYA RESELLER (AS APPLICABLE) UNDER A COMMERCIAL AGREEMENT WITH AVAYA OR AN AUTHORIZED AVAYA RESELLER. UNLESS OTHERWISE AGREED TO BY AVAYA IN WRITING, AVAYA DOES NOT EXTEND THIS LICENSE IF THE SOFTWARE WAS OBTAINED FROM ANYONE OTHER THAN AVAYA, AN AVAYA AFFILIATE OR AN AVAYA AUTHORIZED RESELLER; AVAYA RESERVES THE RIGHT TO TAKE LEGAL ACTION AGAINST YOU AND ANYONE ELSE USING OR SELLING THE SOFTWARE WITHOUT A LICENSE. BY INSTALLING, DOWNLOADING OR USING THE SOFTWARE, OR AUTHORIZING OTHERS TO DO SO, YOU, ON BEHALF OF YOURSELF AND THE ENTITY FOR WHOM YOU ARE INSTALLING, DOWNLOADING OR USING THE SOFTWARE (HEREINAFTER REFERRED TO INTERCHANGEABLY AS “YOU” AND “END USER”), AGREE TO THESE TERMS AND CONDITIONS AND CREATE A BINDING CONTRACT BETWEEN YOU AND AVAYA INC. OR THE APPLICABLE AVAYA AFFILIATE ( “AVAYA”). Avaya provides a telephone number for you to use to report problems or to ask questions about your Product. The support telephone number is 1-800-242-2121 in the United States. 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...
View Full Document