Avaya 8800 Planning And Engineering, Network Design page 92

Redundant network design
destined to the peer's MAC addresses – thus preventing IPv6 data traffic from being sent over the
IST. When an RSMLT node detects that its RSMLT peer is down, the node also begins terminating
IPv6 traffic destined to the peer's IPv6 addresses.
With RSMLT enabled, an SMLT switch performs IP forwarding on behalf of its SMLT peer – thus
preventing IP traffic from being sent over the IST.
IPv6 RSMLT supports the full set of topologies and features supported by IPv4 RSMLT, including
SMLT triangles, squares, and SMLT full-mesh topologies, with routing enabled on the core VLANs.
With IPv6, you must configure the RSMLT peers using the same set of IPv6 prefixes.
Supported routing protocols include the following:
• IPv6 Static Routes
• OSPFv3
IPv4 IST with IPv6 RSMLT
The Avaya Ethernet Routing Switch 8800/8600 does not support the configuration of an IST over
IPv6. IST is supported over IPv4 only.
Example network
The following figure shows a sample IPv6 RSMLT topology. It shows a typical redundant network
example with user aggregation, core, and server access layers. To minimize the creation of many
IPv6 prefixes, one VLAN (VLAN 1, IP prefix A) spans all wiring closets.
RSMLT provides the loop-free topology. The aggregation layer switches are configured with routing
enabled and provide active-active default gateway functionality through RSMLT.
June 2016 Planning and Engineering — Network Design
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