Program at a glance Tutorial program Technical program Abstracts Papers
- Routing and Bridging
- Full Paper
- SmartBridge: A Scalable Bridge Architecture
Thomas L. Rodeheffer (Compaq Systems Research Center)
Chandramohan A. Thekkath (Compaq Systems Research Center)
Darrell Anderson (Duke University)
As the number of hosts attached to a network increases beyond what can
be connected by a single local area network (LAN), forwarding packets
between hosts on different LANs becomes an issue. Two common solutions
to the forwarding problem are IP routing and spanning-tree bridging.
IP routing scales well, but imposes the administrative burden of
managing subnets and assigning addresses. Spanning-tree bridging, in
contrast, requires no administration, but often does not perform well
in a large network, because too much traffic must funnel through the
root of the spanning tree, creating a bottleneck.
This paper introduces a new architecture, called SmartBridge, that
combines the good features of IP routing and spanning-tree bridging.
We have implemented the SmartBridge design for 10 Mb/s and 100 Mb/s
Ethernet LANs, using standard PC hardware with off-the-shelf network
interface cards and running our algorithms in software. Our 100 Mb/s
system runs at full link bandwidth.