Design Reference

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Table Of Contents

Contents
Chapter 1: Introduction
- Purpose
- Related resources
- Support
Chapter 2: New in Release 4.0.50
- Features
- Other changes
Chapter 3: New in Release 4.0.40
- Features
- Other changes
Chapter 4: New in Release 4.0
- Features
- Other changes
Chapter 5: Network design fundamentals
Chapter 6: Hardware fundamentals and guidelines
- Supported hardware
- Platform considerations
- Hardware compatibility
- Supported optical devices
- Dispersion considerations for long reach
- 10/100BASE-X and 1000BASE-TX reach
- 10/100/1000BASE-TX Auto-Negotiation recommendations
- Auto MDIX
- CANA
Chapter 7: Optical routing design
- Optical routing system components
Chapter 8: Platform redundancy
- Power redundancy
- Input/output port redundancy
- Configuration redundancy
- Link redundancy
Chapter 9: Link redundancy
- Physical layer redundancy
- MultiLink Trunking
- 802.3ad-based link aggregation
Chapter 10: Layer 2 loop prevention
- Loop prevention and detection
- SLPP example scenarios
Chapter 11: Spanning tree
- Spanning tree and protection against isolated VLANs
- MSTP and RSTP considerations
Chapter 12: Layer 3 network design
- VRF Lite
- Virtual Router Redundancy Protocol
- Open Shortest Path First
- Border Gateway Protocol
- IP routed interface scaling
Chapter 13: SPBM design guidelines
- 802.1aq standard
- VLANs without member ports
- Provisioning
- Implementation options
- Reference architectures
- Solution-specific reference architectures
- Best practices
- SPBM restrictions and limitations
- IP multicast over SPBM restrictions
Chapter 14: IP multicast network design
- Multicast and VRF-Lite
- Multicast and MultiLink Trunking considerations
- Multicast scalability design rules
- IP multicast address range restrictions
- Multicast MAC address mapping considerations
- Dynamic multicast configuration changes
- IGMPv3 backward compatibility
- IGMP Layer 2 Querier
- TTL in IP multicast packets
- Multicast MAC filtering
- Guidelines for multicast access policies
- Multicast for multimedia
Chapter 15: System and network stability and security
- DoS protection mechanisms
- Damage prevention
- Data plane security
- Control plane security
- Additional information
Chapter 16: QoS design guidelines
- QoS mechanisms
- QoS interface considerations
- Network congestion and QoS design
- QoS examples and recommendations
Chapter 17: Layer 1, 2, and 3 design examples
- Layer 1 example
- Layer 2 example
- Layer 3 example
Chapter 18: Software scaling capabilities
Chapter 19: Supported standards, RFCs, and MIBs
- Supported IEEE standards
- Supported RFCs
- Quality of service
- Network management
- MIBs
- Standard MIBs
- Proprietary MIBs
Glossary

Figure 21: Avoiding excessive ICMP redirect messages without SMLT

Open Shortest Path First

Use OSPF to ensure that the switch can communicate with other OSPF routers. This section

describes some general design considerations and presents a number of design scenarios for

OSPF.

For more information about OSPF concepts and configuration, see Avaya Virtual Services Platform

4000 Series Configuration — OSPF and RIP, NN46251-506.

OSPF LSA limits

To determine OSPF link-state advertisement (LSA) limits:

1. Use the command show ip ospf area to determine the LSA_CNT and to obtain the

number of LSAs for a given area.

2. Use the following formula to determine the number of areas. Ensure the total is less than

16,000 (16K):

N = 1 to the number of areas for each switch

Adj

= number of adjacencies for each Area N

LSA_CNT

= number of LSAs for each Area N

For example, assume that a switch has a configuration of three areas with a total of 18 adjacencies

and 1000 routes. This includes:

• 3 adjacencies with an LSA_CNT of 500 (Area 1)

• 10 adjacencies with an LSA_CNT of 1000 (Area 2)

Open Shortest Path First

December 2014 Network Design Reference for Avaya VSP 4000 Series 61

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