Applying no IP route-cache on VLAN interfaces in a Layer 3 switch

1545 pts.
Tags:
IP routing protocols
L3 Switches
Layer 3 switches
Networking
Switches
Virtual LAN
VLAN
Is it necessary to apply no IP route cache on virtual local area networks (VLAN) interfaces in an L3 switch and why? What are the advantages or disadvantages?

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This commands disables fast-switching on that interface. So fast switching is disabled on this interface and every time a packet arrives at this interface cache is not referred to. So with this command you achieve per-packet load balancing. However, this is slow as compared to when route-cache is enabled, resulting in per-destination load balancing. This delay however is not noticeable to users.
Hope this helps.

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