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INSTALLATION REQUIREMENTS/ SPECIFICATIONS
2-2
2.3 OPERATING SPECIFICATIONS
The operating specifications for Cabletron Systems' NB20E or NB25E
Two Port Bridge Series are included in this section. Cabletron Systems
reserves the right to change these specifications at any time without
notice.
GENERAL
Parameter NB20E NB25E
Packet Buffer Memory (RAM): 128K 128K
Internal Processor: 16MHz 16MHz
Intel 80186 Intel 80186
Ethernet Controller: two 8390 two 8390
Ethernet Ethernet
Controllers Controllers
Scratch Ram: 512K 512K
PERFORMANCE
Parameter NB20E NB25E
Packet Filter Rate
(max. viewed per second): 15,000 Packets 28,000 Packets
Packet Forward Rate
(max. viewed per second): 8,000 Packets 11,000 Packets
Forwarding Latency: 125
µ
s Min. 91
µ
s Min.
Source Address Table Size: 2048 Max. 8191 Max.
Age Time (User Definable): 5 Minutes 5 Minutes
(Default) (Default)