Accton Technology ES4626 - Manual (Page 278)

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Chapter 9 L3 Forward Configuration
ES4624-SFP/ES4626-SFP switch supports Layer 3 forwarding which forwards Layer
3 protocol packets (IP packets) across VLANs. Such forwarding uses IP addresses, when
a port receives an IP packet, it will index it in its own route table and decide the operation
according to the index result. If the IP packet is destined to another subnet reachable
from this switch, then the packet will be forwarded from the appropriate port.
ES4624-SFP/ES4626-SFP switch can forward IP packets by hardware, the forwarding
chip of ES4624-SFP/ES4626-SFP switch have a host route table and default route table.
Host route table stores host routes to connect to the switch directly; default route table
stores network routes (after aggregation algorithm process).
If the route (either host route or network route) for forwarding unicast traffic exists in
the forwarding chip, rather than processing by the CPU in router, the forwarding of traffic
will be completely handled by hardware,not like router forwarding by CPU. As a result,
forwarding efficiency can be greatly improved, even to wire speed.
9.1 Layer 3 Interface
9.1.1 Introduction to Layer 3 Interface
Layer 3 interface can be created on ES4624-SFP/ES4626-SFP switch. The Layer 3
interface is not a physical interface but a virtual interface. Layer 3 interface is built on
VLANs. The Layer 3 interface can contain one or more layer2 interfaces which belongs to
the same VLAN, or no layer2 interfaces. At least one of the Layer2 interfaces contained
in Layer 3 interface should be in a UP state for Layer 3 interface in the UP state,
otherwise, Layer 3 interface will be in the DOWN state. All layer 3 interfaces in the switch
use the same MAC address by default, this address is selected from the reserved MAC
address while creating Layer 3 interface. The Layer 3 interface is the base for layer 3
protocols. The switch can use the IP addresses set in the layer 3 interfaces to
communicate with the other devices via IP. The switch can forward IP packets between
different Layer 3 interfaces.
9.1.2 Layer 3 Interface Configuration Task List
1. Create Layer 3 Interface
Command Explanation