Intel ER8100STUS - Express 8100 Router Reference Manual page 130

Example bandwidth
usages for IPX RIP
Example bandwidth
usages for IPX SAP
Bandwidths used by
Spanning Tree bridging
services
Example bandwidth
usages for Spanning
Tree bridging
118
each IPX RIP packet can only contain 50 entries, i.e., if more than 50 sta-
tions are transmitted, 2 or more packets must be used
each IPX SAP packet can only contain 7 entries, i.e., if more than 7 stations
are transmitted, 2 or more packets must be used
IPX RIP and SAP updates are sent every 60 seconds
For 50 IPX networks, the IPX RIP protocol requires 52 bit/s of link bandwidth.
For 100 IPX networks, the IPX RIP protocol requires 115 bit/s of link bandwidth,
and so on.
For 50 IPX services, the IPX SAP protocol requires 460 bit/s of link bandwidth.
For 100 IPX services, the IPX SAP protocol requires 917 bit/s of link bandwidth,
and so on.
The following table lists the bandwidth used by Spanning Tree bridging:
each bridging BPDU packet is 35 bytes/link
bridging BPDU packets are sent every second
Bridging updates (BPDU packets require 280 bit/s of link bandwidth.
Protocol Bandwidth Overheads and Requirements