Software Switching
Software switching occurs when traffic cannot be processed in hardware. The following types of exception packets are processed in software at a much slower rate:
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Note Packets that use TCP header options are switched in hardware because they do not affect the forwarding decision. |
- Packets that have an expiring IP time-to-live (TTL) counter
- Packets that are forwarded to a tunnel interface
- Packets that arrive with non-supported encapsulation types
- Packets that are routed to an interface with non-supported encapsulation types
- Packets that exceed the MTU of an output interface and must be fragmented
- Packets that require an IGMP redirect to be routed
- 802.3 Ethernet packets
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