Ethernet Switching/Policy Setup - Motorola 2200 Administrator's Handbook

Administrator's Handbook
- WAN-side VLAN with Multiple WAN IPoE interface support and IP interface-to-VLAN binding
- LAN-side VLAN with IP interface-to-VLAN binding
- Inter-VLAN routing
•
Bridged VLANs - these VLANs are used to bridge traffic from LAN to WAN
•
Prioritization per VLAN and per port

Ethernet Switching/Policy Setup

Before you configure any VLANs, the unconfigured Gateway is set up as a router composed of a LAN switch,
a WAN switch, and a router in the middle, with LAN and WAN IP interfaces connected to their respective
switches. These bindings between Ethernet switch ports, IP LAN interface, IP WAN interface and WAN phys-
ical ports are automatically created.
When you configure any VLANs, the default bindings are no longer valid, and the system requires explicit
binding between IP interfaces and layer 2 interfaces. Each VLAN can be thought of as a layer 2 switch, and
enabling each port or interface in a VLAN is analogous to plugging it in to the layer 2 switch.
Thereafter, in order for devices to communicate on layer 2, they must be associated in the same VLAN. For
devices to communicate at layer 3, the devices must be either on the same VLAN, or on VLANs that have an
Inter-VLAN routing group enabled in common.
When configuring VLANs you must define how traffic needs to be forwarded:
•
If traffic needs to be bridged between LAN and WAN you can create a single VLAN that encompasses the
WAN port and LAN ports.
•
If traffic needs to be routed then you must define four elements:
• LAN-side VLANs
• WAN-side VLANs
• Associate IP Interfaces to VLANs
• Inter-VLAN Routing Groups: configuration of routing between VLANs is done by association of a VLAN
to a Routing Group. Traffic will be routed between VLANs within a routing group. The LAN IP Ethernet
Interface can be bound to multiple LAN VLANs, but forwarding can be limited between an Ethernet LAN
port and a WAN VLAN if you properly configure Inter-VLAN groups.
Inter-VLAN groups are also used to block routing between WAN interfaces. If each WAN IP interface is
bound to its own VLAN and if you configure a different Inter-VLAN group for each WAN VLAN then no rout-
ing between WAN IP interfaces is possible.
•
Example: to route between a VCC and all the LAN ports, which effectively is similar to the default config-
uration without any VLANs:
Create a VLAN named "VccWan" consisting of vcc1, ip-vcc1, routing-group 1
Create a VLAN named "Lan" consisting of eth0.1, eth0.2, eth0.3, eth0.4, ssid1, ssid2, ssid3, ssid4
(etc.), ip-eth-a, routing-group 1
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