Multihoming; Network Redundancy; Modular Network Design For Redundant Networks - Avaya 8800 Planning And Engineering, Network Design

Redundant network design
• High Availability (HA) for BFD
The Ethernet Routing Switch 8800/8600 supports partial HA for BFD.
The Ethernet Routing Switch 8800/8600 also supports the modification of transmit and receive
intervals during an active BFD session.

Multihoming

Multihoming enables the Avaya Ethernet Routing Switch 8800/8600 to support clients or servers
that have multiple IP addresses associated with a single MAC address.
Multihomed hosts can be connected to port-based, policy-based, and IP subnet-based VLANs.
The IP addresses that you associate with a single MAC address on a host must be located in the
same IP subnet. The Ethernet Routing Switch 8800/8600 supports multihomed hosts with up to 16
IP addresses per MAC address.
For more information about multihoming, see Avaya Ethernet Routing Switch 8800/8600
Configuration — VLANs and Spanning Tree, NN46205-517.

Network redundancy

Provide network redundancy so that a faulty switch does not interrupt service. You can configure
mechanisms that direct traffic around a malfunctioning switch. The sections that follow describe
designs you can follow to achieve network redundancy.
Network redundancy navigation
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Modular network design for redundant networks

• Network edge redundancy
• Split Multi-Link Trunking
• Routed SMLT
• Switch clustering topologies and interoperability with other products
Modular network design for redundant networks
Network designs normally depend on the physical layout and the fiber and copper cable layout of
the area. When designing networks, Avaya recommends that you use a modular approach. Break
the design into different sections, which can then be replicated as needed using a recursive model.
You must consider several functional layers or tiers. To define the functional tiers, consider campus
architectures separately from data center architectures.
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Planning and Engineering — Network Design
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