Netgear Switch M4100 User Manual download pdf (Page 61)

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Chapter 4. Port Routing | 61

ProSafe M4100 and M7100 Managed Switches

Port Routing Configuration

The M4100 and M7100 Managed Switch always supports Layer 2 bridging, but Layer 3

routing must be explicitly enabled, first for the M4100 and M7100 Managed Switch as a

whole, and then for each port that is to be part of the routed network.

The configuration commands used in the example in this section enable IP routing on ports

1/0/2,1/0/3, and 1/0/5.

The router ID will be set to the M4100 and M7100 Managed Switch’s

management IP address, or to that of any active router interface if the management address

is not configured.

After the routing configuration commands have been issued, the following functions will be

active:

• IP forwarding, responsible for forwarding received IP packets.

• ARP mapping, responsible for maintaining the

ARP Table used to correlate IP and MAC

addresses. The table contains both static entries and entries dynamically updated based

on information in received ARP frames.

• Routing

Table Object, responsible for maintaining the common routing table used by all

registered routing protocols.

You can then activate RIP or OSPF, used by routers to exchange route information, on top of

IP Routing. RIP is more often used in smaller networks, while OSPF was designed for larger

and more complex topologies.

The following figure shows a Layer 3 switch configured for port routing. It connects three

dif

ferent subnets, each connected to a different port.

Subnet 2 Subnet 3 Subnet 5

Port 1/0/3

192.130.3.1

Port 1/0/5

192.64.4.1

Port 1/0/2

192.150.2.2

Layer 3 switch

acting as a router

Figure 7. Layer 3 switch configured for port routing

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