NETGEAR 7000 Series manual Vlan Routing, Example #2 Enabling Routing for Ports on the Switch

NETGEAR 7000 Series Managed Switch Administration Guide Version 7.2

Example #2: Enabling Routing for Ports on the Switch

Use the following commands to enable routing for ports on the switch. The default link-level encapsulation format is Ethernet. Configure the IP addresses and subnet masks for the ports. Network directed broadcast frames will be dropped and the maximum transmission unit (MTU) size will be 1500 bytes.

(Netgear Switch) #config

(Netgear Switch) (Config)#interface 1/0/2 (Netgear Switch) (Interface 1/0/2)#routing

(Netgear Switch) (Interface 1/0/2)#ip address 192.150.2.1 255.255.255.0 (Netgear Switch) (Interface 1/0/2)#exit

(Netgear Switch) (Config)#interface 1/0/3 (Netgear Switch) (Interface 1/0/3)#routing

(Netgear Switch) (Interface 1/0/3)#ip address 192.150.3.1 255.255.255.0 (Netgear Switch) (Interface 1/0/3)#exit

(Netgear Switch) (Config)#interface 1/0/5 (Netgear Switch) (Interface 1/0/5)#routing

(Netgear Switch) (Interface 1/0/5)#ip address 192.150.5.1 255.255.255.0 (Netgear Switch) (Interface 1/0/5)#exit

(Netgear Switch) (Config)#exit

VLAN Routing

You can configure 7000 Series Managed Switch with some ports supporting VLANs and some supporting routing. You can also configure it to allow traffic on a VLAN to be treated as if the VLAN were a router port.

When a port is enabled for bridging (the default) rather than routing, all normal bridge processing is performed for an inbound packet, which is then associated with a VLAN. Its MAC Destination Address (DA) and VLAN ID are used to search the MAC address table. If routing is enabled for the VLAN and the MAC DA of an inbound unicast packet is that of the internal bridge-router interface, the packet will be routed. An inbound multicast packet will be forwarded to all ports in the VLAN, plus the internal bridge-router interface if it was received on a routed VLAN.

Since a port can be configured to belong to more than one VLAN, VLAN routing might be enabled for all of the VLANs on the port, or for a subset. VLAN Routing can be used to allow more than one physical port to reside on the same subnet. It could also be used when a VLAN spans multiple physical networks, or when additional segmentation or security is required.

7-4 IP Routing Services

v1.0, May 2008