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M
MMAC Protocol Support
ICRO
2.3.1
MicroMMAC Bridging and Routing
The MicroMMAC can operate as a bridge, a router, or both. The
MicroMMAC operates as a router for network protocols that are
supported when routing is enabled and operates as a bridge when bridging
is enabled. When both bridging and routing are enabled, routing takes
precedence over bridging, i.e., the MicroMMAC uses the protocol address
information of the packet to route the packet to the correct destination.
However, if the protocol is not supported, the MicroMMAC operates as a
bridge and uses the MAC address information to send the packet.
Operation of the MicroMMAC is influenced by routing and bridging
controls and filters set during MicroMMAC configuration. General IP
routing, and routing or bridging from specific remote routers are controls
set during the configuration process.
The MicroMMAC supports the IEEE 802.1d
IEEE 802.1d Bridging —
standard for LAN to LAN bridging. Bridging is provided over PPP as
well as adjacent LAN ports. The bridging software uses transparent
bridging. When the MicroMMAC is configured as a bridge, the unit
bridges data packets to the destination, regardless of the network
protocols used.
The MicroMMAC uses the Spanning Tree Algorithm to provide bridging
redundancy while preventing data loops and duplicate data. This is a
self-learning bridge, i.e., the bridge builds and updates an address table
with each MAC source address and associated information when the
packets are received.
4
MicroMMAC Local Management Routing Addendum
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