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 13: VLAN isolation

MSTP and RSTP considerations

The Spanning Tree Protocol (STP) provides loop protection and recovery, but it is slow to respond

to a topology change in the network (for example, a dysfunctional link in a network). RSTP (IEEE

802.1w) and MSTP (IEEE 802.1s) reduce the recovery time after a network failure. RSTP and

MSTP also maintain a backward compatibility with IEEE 802.1D. Typically, the recovery time of

RSTP and MSTP is less than 1 second. RSTP and MSTP also reduce the amount of flooding in the

network by enhancing the way that Topology Change Notification (TCN) packets are generated.

Use MSTP to configure MSTIs on the same switch. Each MSTI can include one or more VLANs.

In MSTP mode you can configure up to 64 instances. Instance 0 or Common and Internal Spanning

Tree (CIST) is the default group, which includes default VLAN 1. Instances 1 to 63 are MSTIs.

MSTP and RSTP considerations

December 2014 Network Design Reference for Avaya VSP 4000 Series 53

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