User's Manual

7. Specifications 7-4
© 2012 Moseley, Inc. All Rights Reserved. 602-16620-01, Rev. A
 Priority Queues (Standard Master I/O & Enhanced Master I/O): 2
 Priority Queues (42xE1/T1 Master I/O): 4
NOTE: The weighted ratios are fixed for 802.1Q VLAN TAG priority and for IPv4 TOS
priority even though they are selectable via the Web Interface. The Low priority queue
flows may be starved under some traffic conditions (Standard Master I/O & Enhanced
Master I/O only).
Flow Control: Flow control is supported in both full-duplex and half-duplex. Full-Duplex
is implemented with respect for PAUSE packets as well as generation of PAUSE packets.
Half-Duplex is implemented with back-pressure.
7.2.2 Gigabit Ethernet (GigE) Performance
Bridging Type: Store and forward switching, dynamic address learning, spanning tree
protocol capable. Supports 802.1D-2004:
 Section 9 Encoding of bridge protocol data units
 Section 14 Bridge Management (partial support via Web Interface and proprietary
MIB)
 Section 16 Bridge Performance
 Section 17 Rapid Spanning Tree Protocol
MAC address capacity: EVENT 5800 supports two MAC addresses. One is for the NMS
and the other is for payload. In addition, internal Ethernet switches can learn up to 1024
addresses (GigE Master I/O & Enhanced GigE Master I/O).
Buffering: GigE Master I/O & Enhanced GigE Master I/O: 128KB
Table 7-3. Gigabit Ethernet % Nominal Throughput
Frame
Size
10Mbps
Throughput
50Mbps
Throughput
100Mbps
Throughput
150Mbps
Throughput
200Mbps
Throughput
250Mbps
Throughput
300Mbps
Throughput
64 125.0% 128.3% 128.2% 132.8% 128.6% 133.1% 132.4%
128 112.6% 114.1% 114.7% 117.5% 115.5% 117.2% 116.2%
256 106.2% 106.4% 107.3% 108.9% 107.5% 110.6% 108.9%
512 103.1% 103.6% 104.6% 105.3% 104.4% 105.5% 104.5%
1024 100.0% 101.5% 102.0% 103.6% 102.1% 104.5% 103.5%
1280 99.9% 101.4% 101.3% 103.4% 101.7% 104.3% 102.5%
1518 99.9% 101.4% 101.1% 103.3% 101.4% 104.2% 102.3%
Table 7-4. Gigabit Ethernet Latency (msec)
Frame
Size
10 Mbps
Data Rate
50 Mbps
Data Rate
100 Mbps
Data Rate
150 Mbps
Data Rate
200 Mbps
Data Rate
250 Mbps
Data Rate
300 Mbps
Data Rate
64 3.29 0.718 0.416 0.261 0.187 0.156 0.133
128 3.34 0.73 0.422 0.265 0.191 0.160 0.136
256 3.44 0.752 0.435 0.274 0.198 0.165 0.141
512 3.66 0.797 0.459 0.291 0.212 0.178 0.152
1024 4.07 0.887 0.508 0.325 0.241 0.202 0.174
1280 4.27 0.932 0.532 0.342 0.255 0.214 0.185
1518 4.48 0.937 0.555 0.358 0.268 0.225 0.195
Packet Size for GigE I/O Card: