Rsmlt Redundant Network With Bridged And Routed Vlans In The Core - Avaya 8800 Planning And Engineering, Network Design

Layer 1, 2, and 3 design examples
RSMLT redundant network with bridged and routed VLANs
in the core
In some networks, it is required or desired that a VLAN be spanned through the core of a network
(for example, a VoIP VLAN or guest VLAN) while routing other VLANs to reduce the amount of
broadcasts or to provide separation. The following figure shows a redundant network design that
can perform these functions.
Figure 138: Redundant network design
In this figure, VLAN-10 spans the complete campus network, whereas VLAN 20, 30, 70, and 80 are
routed at the wiring closet. VLANs 40, 50, and 60 are core VLANs with RSMLT enabled. These
VLANs and their IP subnets provide subsecond failover for the routed edge VLANs. You can use
Routing Information Protocol (RIP), Open Shortest Path First (OSPF) or Border Gateway Protocol
(BGP) to exchange routing information. RSMLT and its protection mechanisms prevent the routing
protocol convergence time from impacting network convergence time.
June 2016 Planning and Engineering — Network Design
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