6-22CHAPTER 6: MANUAL SETUP

then the packets will be encapsulated in a bridged-1483 format. If the configured service is PPP, the packets will be encapsulated in BRCP.

To enable MAC-Encapsulated Routing in a VC profile, use the command:

set￿vc <vc_name> mac_routing enable

To disable the MAC-Encapsulated Routing in a VC profile, use the command:

set vc <vc_name> mac_routing disable

Simultaneous

Bridging and

Routing

The OfficeConnect Remote 812 can be configured for simultaneous bridging and routing. IP routing is configured if IP forwarding is enabled (see Enabling IP Routing). IPX routing is enabled if an IPX network is present over the Ethernet interface (see Configuring IPX for the LAN). Bridging is enabled by adding a bridge network over the Ethernet interface. (see Configuring Bridging for the LAN). Routing and bridging are enabled for each destination in its remote site profile.

When configured for simultaneous bridging and routing, packets received from the LAN are first passed through the router for any configured protocols. If the packet can not be routed it is passed to the bridge depending on the setting of the Bridge Firewall function.

The Bridge Firewall has three modes:

1Discard Routed Protocols:

This is the default mode. If a protocol is configured for routing and a packet for that protocol type is received from the LAN that is not addressed to the MAC address of the OfficeConnect Remote 812, it is discarded.Additionally, broadcasts (including ARPs) for the protocol are not passed to the bridge. To configure the Bridge Firewall for this mode, use the command:

set bridge firewall discard_routed_protocols

2Forward Unicast Packets Only:

If a protocol is configured for routing, and a packet for that protocol type is received from the LAN that is not addressed to the MAC address of the OfficeConnect Remote 812, it is bridged. Additionally, ARP broadcasts for IP addresses other than that of the OfficeConnect Remote 812 are also bridged. Other broadcasts for the configured protocol are not bridged. To configure the Bridge Firewall for this mode, use the command:

set bridge firewall fwd_unicast_only

3Forward Broadcast/Unicast Packets:

Unicast packets for a configured protocol received from the LAN that are not addressed to the MAC address of the OfficeConnect Remote 812 are bridged. Received broadcasts (e.g., DHCP) are bridged. To configure the Bridge Firewall for this mode, use the command:

set bridge firewall fwd_bc_and_unicast

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3Com 812 manual Simultaneous Bridging Routing