Solution Overview; Smlt Design; Figure 2: Smlt Interconnect - Avaya 8600 Technical Configuration Manual

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1.3 Solution Overview

1.3.1 SMLT design

Internet
FW1 FW2
Site3
SMLT
Site1
IST MLT
Site2
SMLT IST Cluster
SMLT SMLT
Site4 Site5

Figure 2: SMLT interconnect

An ERS 8600 will be deployed at each site. The five ERS 8600s will be interconnected using 10Gigabit
Ethernet links in an SMLT Clustering configuration. The ERS 8600s in the two main sites, which provide
Internet connectivity to the network, will be made the SMLT Cluster nodes (logically acting as one switch)
and will be interconnected by a DMLT IST connection. The remaining sites will be connected as SMLT
edge devices using SMLT Triangle Topology as shown in Figure 2. VLACP will be enabled on all links
using long timers on IST links and short timers on SMLT links. The maximum number of hops for traffic to
reach a remote Site will be at most 2 hops and in some cases 1 hop only.
Thanks to Avaya's advanced packet processor architecture the ERS 8600 will always hardware switch all
traffic flows including IPVPN traffic used in this design. This means that if a non-blocking 10gig hardware
configuration is used (e.g. using 8683XLR/XZR 3-port 10GBASE-X LAN/WAN XFP modules) then full
10gig bandwidth as well as extremely low latency will be available from Site to Site.
Furthermore, if 10gig did become insufficient between some Sites, increasing the bandwidth in this design
is as simple as adding additional 10gig links to the existing MLTs.
Network Design Implementation to Provide L2 & L3 VPN Connectivity
10
November 2010
between Sites using SMLT and IPVPN-Lite for ERS 8600
Technical Configuration Guide