Specifications

CHAPTER 5
Implementing High Availability
In Figure 5-4 the access switches are L3. This gives the faster convergence and is easiest to implement. All links between
switches are L3. There is no need for HSRP, although STP should still be enabled in case of a misconfiguration. Access
switches can load balance traffic across both uplinks. The access switches either run a routing protocol or use static
routes. The distribution switches summarize routes for the access VLANs.
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CCNP SWITCH 642-813 Quick Reference by Denise Donohue
FIGURE 5-3
Layer 2 Access
Switches with Local
VLANs
RSTPL2 Access
VLAN 20VLAN 10
L3 Link
L3
Distribution
HSRP Active
and STP Root,
VLAN 20
HSRP Active
and STP Root,
VLAN 10
FIGURE 5-4
Layer 3 Access
Switches
Routing
Protocol
or Static
Routes
L3 Access
VLAN 20VLAN 10
L3 Link
L3 Links
L3
Distribution
Route
Summarization
Route
Summarization