Simultaneous Bridging And Routing - 3Com OfficeConnect Remote 812 Cli User's Manual

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HAPTER ANUAL
Simultaneous
Bridging and
Routing
S
ETUP
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
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:
1 Discard 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
2 Forward 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
3 Forward 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