Table 5.5-3: Rj-45 Individual Port Settings; Table 5.5-4: Global Port Settings - Moog 903 User Manual

903-0623-00 Rev. A
Table 5.5-3 shows the settings for auto-negotiate or forced protocol. Auto-negotiate automatically
configures the data rate and duplex mode of the port to match the external device connected and typically
occurs within a few seconds after making a connection. Each port may be independently forced to one of
the configurations listed.
In most applications, the EIB-10/100 port and external device port should be either both set to
auto-negotiation or both forced to the same speed and duplex configuration. In cases where the device at
one end of the link is forced and the other auto-negotiates, the link may configure itself with a duplex
mismatch that causes moderate to severe degradation of the packet throughput. Moreover, older
10Base-T and 100Base-TX equipment may be incompatible with auto-negotiation altogether. In these
cases, the EIB-10/100 port should be forced to match the external device. Switch-to-switch connections
often work better when both ends of the link use forced configurations.
Port Configuration
Auto-Negotiate (default)
10Base-T Half Duplex
10Base-T Full Duplex
100Base-TX Half Duplex
100Base-TX Full Duplex
1 = ON = CLOSED, 0 = OFF = OPEN, X = DON'T CARE
Table 5.5-4 shows additional global settings that may be switch configured. These settings apply to all
ports simultaneously.
Parameter
Flow Control
Broadcast Protection
Backwards Compatibility
RJ-45 Port Grounding
RJ-45 Shield Grounding
1 = ON = CLOSED, 0 = OFF = OPEN
Flow control is normally enabled. This feature applies "back pressure" to the port if buffers are nearing
100% use to avoid a buffer overflow and subsequent loss of packets. Such a situation usually only arises
during peak traffic periods or when a 100 Mbps device is connected to the EIB-10/100 (electrical version)
card, which is limited to 10 Mbps through the multiplexer.
Broadcast protection is normally enabled. Broadcast and multicast packets are normally forwarded to all
switch ports other than the originating port. With broadcast protection enabled, the switch will discard
broadcast or multicast packets if the number of those packets exceeds a threshold of 25% of the network
line rate, thereby minimizing "broadcast storms". Broadcast protect should be disabled if the given
application requires more than 25% broadcast packets.
Backwards compatibility is normally disabled. This feature allows the electrical version of the EIB-10/100
to be used with the older EIB-10BT cards. When enabled, backwards compatibility forces the EIB-10/100
backplane Ethernet link into a 10 Mbps half-duplex mode. This limits performance to a similar level as the
EIB-10BT card, which has a limit of 2 km on the optical fiber link.
Focal Technologies Corp.

Table 5.5-3: RJ-45 Individual Port Settings

Port 1
S1:1 S2:1 S3:1
1 X X
0 1 1
0 1 0
0 0 1
0 0 0

Table 5.5-4: Global Port Settings

Switch
S1:4
S2:4
S3:4
S8 1 = REFEL (REF. GND), 0 = CHASSIS (DEFAULT)
S9 1 = REFEL (REF. GND), 0 = CHASSIS (DEFAULT)
Model 903 User's Guide, FMB-X-2.5 Version
Port 2
S1:2 S2:2 S3:2
1 X X
0 1 1
0 1 0
0 0 1
0 0 0
Settings
1 = DISABLED, 0 = ENABLED (DEFAULT)
1 = DISABLED, 0 = ENABLED (DEFAULT)
1 = ENABLED, 0 = DISABLED (DEFAULT)
Port 3
S1:3 S2:3 S3:3
1 X X
0 1 1
0 1 0
0 0 1
0 0 0
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