Redundant network design
Figure 25: SMLT and RSMLT in Layer 3 environments
The aggregation layer switches are routing-enabled and provide active-active default gateway
functions through RSMLT. Routers R1 and R2 forward traffic for IP subnet A. RSMLT provides both
router failover and link failover. For example, if the SMLT link in between R2 and R4 are broken, the
traffic fails over to R1.
June 2016
Planning and Engineering — Network Design
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