Applications Guide

45 Danco Road, Putnam, CT 06260 • Phone: 888-748-6855 • opticonx.com

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Applications Guide

45 Danco Road, Putnam, CT 06260 • Phone: 888-748-6855 • opticonx.com

Arista Networks 7500E Switch and Linecard Optical Cabling Guide

This cabling applications guide will assist you with the design of a fiber optic cabling system for Arista Networks 7500E series data center switches. The 7500E series switches and line cards feature software configurable 10/40/100G channels over the same interface port. The 7500E is offered in two chassis ver-sions. The DCS-7504 is a 4 slot, 7U chassis that accepts 4 linecards and the DCS-7508 is an 8 slot, 11U chassis that accepts 8 linecards. Arista offers 4 different linecard variations:

Arista DCS-7500E-12DM-LC is a 12 port 100GbE SR10 MXP linecard with embedded optics. The ports are 24f MTP’s that can be configured as 12 x 10G, 4 x 40G, or 1 x 100G channels. A fully utilized MXP linecard requires 288 fibers.

Arista DCS-7500E-36Q-LC is a 36 port QSFP+ 40G linecard for 10/40G. The fiber ports are 12f MTP’s that can be configured as 1 x 40G or 4 x 10G when used with 10/40G transition modules. A fully utilized linecard requires 288 fibers.

Arista DCS-7500E-72S-LC is a 48 port SFP+ for 1/10GbE and 2 port 100GbE SR10 MXP linecard. The fiber ports are 48 LC duplex and 2 x 24f MTP. The 2 MXP ports can be configured as 10/40/100G ports. A fully utilized linecard requires 144 fibers.

Arista DCS-7500E-48S-LC is a 48 port SFP+ linecard for wire-speed 1/10GbE. The fiber ports are 48 LC duplex. A fully utilized linecard requires 96 fibers.

These Arista 7500E series are typically deployed in a two tier “leaf-spline” configuration with 7500E “spline” switches connected to 7050S and/or 7150S series “leaf” switches.

100G Switch to Switch Links

With 100GbE links between 7500E switches with DCS-7500E-12DM-LC or DCS-7500E-72S-LC linecards, a 24f MTP jumper cable is run directly beween the MXP ports on the switch linecards. This ca-bling is best for inter-switch links when both switches are in close proximity, usually within the same row of cabinets.

Figure 1: 100G Directly Connected Switches

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Applications Guide

45 Danco Road, Putnam, CT 06260 • Phone: 888-748-6855 • opticonx.com

In larger networks where high fiber count MTP trunks are deployed, a structured cabling approach pro-vides a scaleable and quickly reconfigured network. Inter-connection points between permanently installed trunks make changes and additions as easy as changing or adding jumpers. The trunks in these examples are 24f with 12f MTP legs, but can be higher counts as long they are increments of 24 with 12f MTP legs.

Figure 2: 100G Structured Cabling Connected Switches

40G Spline to Leaf Links

All MXP ports on 7500E series linecards can be internally switch to transmit 40GbE to leaf switches or 7500E linecards with QFSP+ ports. The Switch interface is 24f MTP, MXP port to 12f MTP QFSP+ port on Arista 7050S-64 switches (4x 40GbE+ ports) and 7150S-64 switches(4x 40GbE+ ports).

Bill of Material for Figure 2.Item # Description Quantity Part Number

1OM4 24f MTP(non-pinned) to 2x 12f MTP(pinned) Transition Harness; Method 4; Plenum Cable; 24” Breakout; XXX Meters

1 PXTDB96X024GXXX

2 MTP Adapter Panel 2 MAPMPO06BLK

3OM4 24f; 2x 12f MTP(non-pinned) to 2x 12f MTP(non-pinned) Trunk; Method A; Plenum Cable; XXX Meters; W/Pulling Eye attached

1 P3XM2DBXXXXM1A

4OM4 24f MTP(non-pinned) to 2x 12f MTP(pinned) Transition Harness; Method 5; Plenum Cable; 24” Breakout; XXX Meters

1 PXTDB96X024HXXX

5 1U FBX Series Patch Panel( not shown) to house item 2 2 FBX061ULG

Bill of Material for Figure 1.Item # Description Quantity Part Number

1 OM4 24f MTP to 24f MTP Non-Pinned Jumper; Plenum Cable; xxx Meters 1 P3XJDB99XMXXXG

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Applications Guide

45 Danco Road, Putnam, CT 06260 • Phone: 888-748-6855 • opticonx.com

In larger data centers where distances are greater and fiber counts are higher and switches are more widely deployed, a structured cabling system provides a much better approach to cable management, utilization, and organization. Trunks are run between inter-connect points near the switches. From there, transition modules, and jumpers complete the connection to switches. Different length jumpers can be used to con-nect to individual 40GbE ports located on same or different Leaf switches.

Figure 3: 40G Directly Connected Switches

With 40GbE directly connected links between 7500E switches with DCS-7500E-12CM-LC or MXP ports on DCS-7500E-72S-LC linecards and QFSP+ ports on 7050S-64 and/or 7150S-64 switches, a 24f MTP to 3 x 8f transition cable is run directly beween the MXP ports on the switch linecards and 3 QFSP+ ports on the leaf switches. This cabling is best for inter-switch links when both switches are in close proximity, usually within the same row of cabinets and all 40GbE ports are on the same leaf switch.

Bill of Material for Figure 3.Item # Description Quantity Part Number

1OM4 24f MTP(non-pinned) to 3x 8f MTP(non-pinned) Transition Harness; Method 4; Plenum Cable; xxx Meters; 24” Breakout Legs

1 PXTDB99X034FXXX

Figure 4: 40G Structured Cabling Linked Switches

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Applications Guide

45 Danco Road, Putnam, CT 06260 • Phone: 888-748-6855 • opticonx.com

Figure 5: 40G Port Linked Switches

In between directly connected and structured inter-connect links are inter-connect port linked switches. They are suited to small and mid sized installations where Leaf switches are clustered in close proximity to the Spline switch. A 24f MTP to 2 x 12f MTP transition cable is run to a transition module, central to the Leaf switches. From this inter-connect point, jumpers are run to 40GbE ports on Leaf switches. This approach is best suited when connecting to multiple leaf switches in the same row, but in the different cabinets than the 7500E switch.

Bill of Material for Figure 4.Item # Description Quantity Part Number

1OM4 24f MTP(non-pinned) to 2x 12f MTP(pinned) Transition Harness; Method 4; Plenum Cable; 24” Breakout; XXX Meters

1 PXTDB96X024GXXX

2 MTP Adapter Panel 1 MAPMPO06BLK

3OM4 24f; 2x 12f MTP(non-pinned) to 2x 12f MTP(non-pinned) Trunk; Method A; Plenum Cable; XXX Meters; W/Pulling Eye attached

1 P3XM2DBXXXXM1A

4OM4 40G Transition Module: 2x 12f MTP(pinned) to 3x 8f MTP Ports 1 P3XCDB66XLF

5OM4 12f MTP(non-pinned) to 12f MTP(non-pinned) Jumper: Method A; Plenum Cable; XXX Meters 3 P3XJDB99XMXXXA

6 1U FBX Series Patch Panel( not shown) to house item 2 and 4

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FBX061ULGFBX081U

Bill of Material for Figure 5.Item # Description Quantity Part Number

1OM4 24f MTP(non-pinned) to 2x 12f MTP(non-pinned) Transition Harness; Method 4; Plenum Cable; 24” Breakout; XXX Meters

1 PXTDB99X024GXXX

2 OM4 40G Transition Module: 2x 12f MTP(pinned) to 3x 8f MTP Ports 1 P3XCDB66XLF

3OM4 12f MTP(non-pinned) to 12f MTP(non-pinned) Jumper: Method A; Plenum Cable; XXX Meters 3 P3XJDB99XMXXXA

4 1U FBX Series Patch Panel( not shown) to house item 2 1 FBX081U

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Applications Guide

45 Danco Road, Putnam, CT 06260 • Phone: 888-748-6855 • opticonx.com

10G Spline to Leaf Links

The MXP ports on 7500E series linecards can also be internally switch to transmit 10GbE to leaf switches or 7500E linecards with SFP+ ports. The switch interface is 24f MTP, MXP port to duplex LC SFP+ ports on Arista 7050S-52, 7050S-64, 7150S-24, 7150S-52 and 7150S-64 switches. Unlike 40/100G cabling sys-tems, directly connected switches are not practical. Structured cabling and port cabling are the considered approaches. Figure 6 shows a structured cabling approach and is best in medium and large scale network installations. 10GbE configured MXP ports are inter-connected to 24f trunks with 12f MTP legs and 12f MTP to LC transition modules, centrally located to the Leaf switches. Duplex LC jumpers complete the 10GbE link to SFP+ ports on the Leaf switch. Various length jumpers can be used to reach SFP+ ports on multiple switches in different cabinets.

Figure 6: 10G Structured Cabling Linked Switches

Bill of Material for Figure 6.Item # Description Quantity Part Number

1OM4 24f MTP(non-pinned) to 2x 12f MTP(pinned) Transition Harness; Method 4; Plenum Cable; 24” Breakout; XXX Meters

1 PXTDB96X024GXXX

2 MTP Adapter Panel 1 MAPMPO06BLK

3OM4 24f; 2x 12f MTP(non-pinned) to 2x 12f MTP(non-pinned) Trunk; Method A; Plenum Cable; XXX Meters; W/Pulling Eye attached

1 P3XM2DBXXXXM1A

4OM4 10G Transition Module: 12f MTPto 6 Duplex LC Ports; Polarity Method 3 2 P3XCDB14XL3

5OM4 Duplex LC to Duplex LC Jumper; Plenum Cable; XXX Meters 12 P3XJDB14XMXXX

61U FBX Series Patch Panel( not shown) to house item 2 and 4 1

1FBX061ULG

FBX081U

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Applications Guide

45 Danco Road, Putnam, CT 06260 • Phone: 888-748-6855 • opticonx.com

Figure 7: 10G Port Linked Switches

When the 7500E switch is in proximity to the 10GbE Leaf switches and the cable runs are short, as may be the case in smaller network installation, a structured cabling port linked approach can be used. A 24f MTP to 2 x 12f MTP transition cable is run to a MTP to LC transition module central the leaf switches. From this inter-connect point, jumpers are run to 10GbE ports on Leaf switches.

Bill of Material for Figure 7.Item # Description Quantity Part Number

1OM4 24f MTP(non-pinned) to 2x 12f MTP(non-pinned) Transition Harness; Method 4; Plenum Cable; 24” Breakout; XXX Meters

1 PXTDB99X024GXXX

2 OM4 10G Transition Module: 12f MTPto 6 Duplex LC Ports; Polarity Method 3 2 P3XCDB14XL3

3 OM4 Duplex LC to Duplex LC Jumper; Plenum Cable; XXX Meters 12 P3XJDB14XMXXX

4 1U FBX Series Patch Panel( not shown) to house item 2 1 FBX081U

40G Links for QSFP+ Linecard Ports

A DCS-7500E-36Q-LC is a 36 port QSFP+ 10/40G switchable linecard. It requires a different cabling scheme than the MXP ports in our previous cabling examples. The fiber ports are 12f MTP’s that can be configured as 1 x 40G or 4 x 10G ports. A fully utilized linecard requires 288 fibers. This linecard can use the same structured cabling trunks(24f with 12f MTP legs) as the MXP configured linecard ports. Only the inter-connect portion of the link is different. 40G, 2x3 transition modules inter-connect trunks and switches with 12f MTP jumpers.

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Applications Guide

45 Danco Road, Putnam, CT 06260 • Phone: 888-748-6855 • opticonx.com

Figure 8: 40G Structured Cabling Linked Switches with QFSP+ Ports

Bill of Material for Figure 8.Item # Description Quantity Part Number

1OM4 24f; 2x 12f MTP(non-pinned) to 2x 12f MTP(non-pinned) Trunk; Method A; Plenum Cable; XXX Meters; W/Pulling Eye attached

1 P3XM2DBXXXXM1A

2 OM4 40G Transition Module: 2x 12f MTP(pinned) to 3x 8f MTP Ports 2 P3XCDB66XLF

3OM4 12f MTP(non-pinned) to 12f MTP(non-pinned) Jumper: Method A; Plenum Cable; XXX Meters 3 P3XJDB99XMXXXA

4OM4 12f MTP(non-pinned) to 12f MTP(non-pinned) Jumper: Method A; Plenum Cable; XXX Meters 3 P3XJDB99XMXXXB

5 1U FBX Series Patch Panel( not shown) to house item 2 2 FBX081U

Figure 9: 40G QSFP+ Directly Connected Switches

In smaller network installations or when switches are located in close proximity say for instance when switches are located within the same row of cabinets, directly connected links are an option. 12f MTP jump-ers are run directly between switches.

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Applications Guide

45 Danco Road, Putnam, CT 06260 • Phone: 888-748-6855 • opticonx.com

Bill of Material for Figure 9.Item # Description Quantity Part Number

1 OM4 12f MTP(non-pinned) to 12f MTP(non-pinned) Jumper; Method A; Plenum Cable; xxx Meters; 1 P3XJDB99XLMXXXB

QSFP+ ports on DCS-7500E-36Q-LC linecards configured as 10GbE links require a transition from 12f MTP QSFP+ at the 7500E switch to duplex LC SFP+ at the leaf switch. An MTP to LC 10GbE module and duplex LC jumpers replace the 40GbE transition module and 12f MTP jumpers at the leaf switch.

Figure 10: 10G Structured Cabling Linked Switches with QFSP+ and SFP+ Ports

Bill of Material for Figure 10.Item # Description Quantity Part Number

1OM4 24f; 2x 12f MTP(non-pinned) to 2x 12f MTP(non-pinned) Trunk; Method A; Plenum Cable; XXX Meters; W/Pulling Eye attached

1 P3XM2DBXXXXM1A

2 OM4 40G Transition Module: 2x 12f MTP(pinned) to 3x 8f MTP Ports 1 P3XCDB66XLF

3OM4 10G Transition Module: 12f MTPto 6 Duplex LC Ports; Polarity Method 3 2 P3XCDB14XL3

4OM4 12f MTP(non-pinned) to 12f MTP(non-pinned) Jumper: Method A; Plenum Cable; XXX Meters 3 P3XJDB99XMXXXA

5OM4 Duplex LC to Duplex LC Jumper; Plenum Cable; XXX Meters 12 P3XJDB14XMXXX

6 1U FBX Series Patch Panel( not shown) to house item 2 2 FBX081U

10G Structured Cabling Linked Switches for QSFP+ to FSP+ Ports

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Applications Guide

45 Danco Road, Putnam, CT 06260 • Phone: 888-748-6855 • opticonx.com

Arista Networks Cables Cross Reference sheetArista Description Opticonx

Part Number Multimode OM4 Fiber - 5 meter(16ft) lengths Part numberCAB-M24PM24P-M5 OM4 MTP24 to MTP24 - Direct connect for port to port (swaps the

Tx and RX rows), 5mP3XJDB99XM005G

CAB-M24P3M12P-M5 OM4 MTP24 to 3x MTP12 - Direct connect for 1 x MTP SR12 to 3 QFSP+ SR4, 5m

PXTDB99X034F005

CAB-M24P12LC-M5 OM4 MTP24 to12x LC - Direct connect for 1x MTP SR12 to 12 SFP+ SR, 5m

PXTDB49X804G005

CAB-M24PM24T-M5 OM4 MTP24 to MTP24 - Port to trunk,non-pinned to pinned, 5m P3XJDB96XM005A

CAB-M24P2M12T-M5 OM4 MTP24 to 2X MTP12 - Port to 2x12 fiber trunks, non-pinned to pinned, 5m

PXTDB96X024J005

CAB-M12PM12P-M5 OM4 MTP12 to MTP12 - Direct connect for port to port (8fiber cross over), 5m

P3XJDB99XM005B

CAB-M12PM12T-M5 OM4 MTP12 to MTP12 - Port to trunk, non-pinned to pinned (8 fiber), 5m

P3XJDB96XM005A

CAB-M12P4LC-M5 OM4 MTP12 to 4 LC - Direct connect for 1x QSFP+ SR4 TO 4 SFP+ SR, 5m

PXTDB49X844F005

Single Mode Fiber - 5 meter(16ft) lengthsCAB-M12PM12P -S5 SM MTP12 to MTP12 - Direct connect for port to port (12 fiber

cross over), 5mP3XJAB99XM005B

CAB-M12PM12T-S5 SM MTP12 to MTP12 - Port to trunk, non-pinned to pinned (8 fiber), 5m

P3XJAB96XM005A

CAB-M12P4LC-S5 SM MTP12 to 4 LC - Direct connect for 1x QSFP+ PLRL4 to 4 SFP+ LR, 5m

PXTBA49X844F005

Multimode OM4 Fiber - 3 meter(10ft) lengthsCAB-M24PM24P-M3 OM4 MTP24 to MTP24 - Direct connect for port to port (swaps the

Tx and RX rows), 3mP3XJDB99XM003G

CAB-M24P3M12P-M3 OM4 MTP24 to 3x MTP12 - Direct connect for 1 x MTP SR12 to 3 QFSP+ SR4, 3m

PXTDB99X034F003

CAB-M24P12LC-M3 OM4 MTP24 to12x LC - Direct connect for 1x MTP SR12 to 12 SFP+ SR, 3m

PXTDB49X804G003

CAB-M24PM24T-M3 OM4 MTP24 to MTP24 - Port to trunk,non-pinned to pinned, 3m P3XJDB96XM003A

CAB-M24P2M12T-M3 OM4 MTP24 to 2X MTP12 - Port to 2x12 fiber trunks, non-pinned to pinned, 3m

PXTDB96X024J003

CAB-M12PM12P-M3 OM4 MTP12 to MTP12 - Direct connect for port to port (8fiber cross over), 3m

P3XJDB99XM003B

CAB-M12PM12T-M3 OM4 MTP12 to MTP12 - Port to trunk, non-pinned to pinned (8 fiber), 3m

P3XJDB96XM003A

CAB-M12P4LC-M3 OM4 MTP12 to 4 LC - Direct connect for 1x QSFP+ SR4 TO 4 SFP+ SR, 3m

PXTDB49X844F003

Single Mode Fiber - 3 meter(10ft) lengthsCAB-M12PM12P -S3 SM MTP12 to MTP12 - Direct connect for port to port (12 fiber

cross over), 3mP3XJAB99XM003B

CAB-M12PM12T-S3 SM MTP12 to MTP12 - Port to trunk, non-pinned to pinned (8 fiber), 3m

P3XJAB96XM003A

CAB-M12P4LC-S3 SM MTP12 to 4 LC - Direct connect for 1x QSFP+ PLRL4 to 4 SFP+ LR, 3m

PXTBA49X844F003