M2LM-SW16 16-Port Myrinet Switch with 8 SAN ports and 8 LAN ports.
M2M-SW16, M2LM-SW16, & M2L-SW16 16-Port Myrinet Switches |
These 16-port Myrinet switches are based on a 16x16 crossbar switch implemented in a single, custom-VLSI chip (XBar16). Because of the high degree of these switches, and because of their monitoring features, they are particularly well-suited for large clusters.
These switches can be supplied with any combination of SAN and LAN ports. The most common configurations are all-SAN (M2M-SW16), 8 SAN and 8 LAN (M2LM-SW16), and all-LAN (M2L-SW16). Please contact info@myri.com for pricing and availability of other configurations.
In a typical application of the M2LM-SW16 switch pictured below, the 8 SAN ports connect via SAN cables to hosts with Myrinet/SAN interfaces within a cabinet to form a sub-cluster, and the 8 LAN ports are used for cabinet-to-cabinet, switch-to-switch connections that form the overall, scalable-network topology.
These switches provide SNMP-based monitoring and control through a 10-Base-T Ethernet port. The monitoring includes counts of CRC-correct and CRC-incorrect packets on each port, the state of each port, and any error conditions detected. The control includes enabling/disabling any port.
All connectors and indicators are on one surface, as shown above, and this 17" x 12" x 3.4" (2U) unit can be rack mounted using accessory brackets on either the front or back. Thanks to the low operating power, these switches do not require fan cooling, and the calculated MTBF is approximately 500,000 hours.
Internal switch: 16-input, 16-output, full-crossbar implementation
with each channel operating at 1.28 Gb/s for a total bisection data rate
of 20.48 Gb/s.
Myrinet-LAN ports: 1.28+1.28 Gb/s or 0.64+0.64 Gb/s data rates selected
automatically by the cable type. (Green) LED indicator for each port: Off
= disconnected. On = connected. Blinking = traffic.
Myrinet-SAN ports: 1.28+1.28 Gb/s data rate on the A links; B links unused. The (Green) LED indicators have the same meaning as on LAN ports if the Myrinet heartbeat is enabled for the port. If the Myrinet heartbeat is disabled (default on power up): Off = illegal control symbols detected. On = link OK. Blinking = traffic.
High-Availability features: Myrinet heartbeat and illegal-control-symbol detection selectable by port, with out-of-band monitoring and control via the Ethernet switch-management port.
Ethernet switch-management port: Standard RJ-45 10-Base-T Ethernet. The Ethernet MAC address is indicated on a label below the RJ-45 connector. An internal microcontroller monitors the XBar16 scan path, and communicates externally using SNMP. Check here for the SNMP MIBS and other documentation on the switch-monitoring port.
Cut-through latency: ~100ns SAN-SAN; ~200ns SAN-LAN; ~300ns LAN-LAN.
Physical characteristics: 17"x12"x3.4" (2U rack mountable),
15 lbs. For rack mounting, 1U (1.75") of clearance is required above
the unit for convection cooling. Maximum-operating ambient temperature 50C.
Power: 40 Watts typical for the M2L-SW16; 32 Watts for the M2LM-SW16,
and 26 Watts for the M2M-SW16. Power input 100-127 V~, 0.7A maximum, or
200-240 V~, 0.4A maximum, 50 or 60 Hz, supplied with IEC line cord appropriate
to the shipping destination.
Approvals: UL and CE approved. The M2L-SW16, along with the LAN cables, are FCC A compliant. The EMI generated from SAN cables connected to SAN ports is in excess of allowed FCC A levels. SAN cables should, accordingly, be confined to the interior of a shielding enclosure.
Last revised: 3 September 1999.
