Network technologies and trends » side to side airflow http://itknowledgeexchange.techtarget.com/network-technologies Wed, 15 May 2013 18:52:38 +0000 en-US hourly 1 Key differences between a Nexus 7010 and 7018 Switches – Series 4 http://itknowledgeexchange.techtarget.com/network-technologies/key-differences-between-a-nexus-7010-and-7018-switches-series-4/ http://itknowledgeexchange.techtarget.com/network-technologies/key-differences-between-a-nexus-7010-and-7018-switches-series-4/#comments Sun, 31 Jul 2011 09:54:29 +0000 Yasir Irfan http://itknowledgeexchange.techtarget.com/network-technologies/key-differences-between-a-nexus-7010-and-7018-switches-series-4/ One more difference I came across among Nexus 7010 and Nexus 7018 Switch is the power supplies, the Nexus 7010 Switch can hold up to three load sharing, fault tolerant , hot-swappable power supplies.  Whereas the Nexus 7018 switch can hold up to four load sharing, fault tolerant, hot-swappable power supplies. The Nexus 7010 Switch requires 9kW of max power , where as the Nexus 7018 Switch requires 15 kW of max power

When it comes to power supplies, same power supplies can be used in both the Nexus 7010 and 7018 switches.

Currently there are three power supplies for the Nexus 7000 switches, two that are AC powered and one that is DC powered.   There is a 6000 kW AC (N7K-AC-6.0KW), a 7500 kW AC (N7k-AC-7.5KW), and finally a 6000 kW DC (N7K-DC-6.0KW) power supply.

The Nexus 7000 Series Switches can be configured in four power redundancy modes as follows

1)      Combined

2)      Power Supply redundancy (N+1)

3)      Input Source redundancy ( grid redundancy)

4)      Power Supply and input source redundancy (full redundancy)

The Nexus 7000 Series Switches are sensitive to variations in voltage supplied by the AC power source. Over voltage, under voltage and spikes can erase data from the memory or cause components to fail. To protect against these kind problems it’s highly recommended to ground power cables.

Pictures of the power supplies are below with the 6000 kW on the left, the 7.5KW on the right and the DC powered one below.

]]> http://itknowledgeexchange.techtarget.com/network-technologies/key-differences-between-a-nexus-7010-and-7018-switches-series-4/feed/ 0 Key differences between a Nexus 7010 and 7018 Switches – Series 3 http://itknowledgeexchange.techtarget.com/network-technologies/key-differences-between-a-nexus-7010-and-7018-switches-series-3/ http://itknowledgeexchange.techtarget.com/network-technologies/key-differences-between-a-nexus-7010-and-7018-switches-series-3/#comments Sun, 31 Jul 2011 08:09:33 +0000 Yasir Irfan http://itknowledgeexchange.techtarget.com/network-technologies/key-differences-between-a-nexus-7010-and-7018-switches-series-3/ The other difference I have noticed between a Nexus 7010 and Nexus 7018 Switches is the way the cooling works. The Nexus 7010 and Nexus 7018 Switches are cooled using the fan trays which are found at the back of Nexus 7000 Series chassis.

The Nexus 7018 Switch applies side to side airflow , the Nexus 7018 fan module  (N7K-C7018-FAN) is larger and contains more fans compared to Nexus 7010 fan module.  The Nexus 7018 chassis houses dual fan modules in a fully redundant architecture and provides efficient cooling using variable speed fans.

The advantage of side to side airflow in Nexus 7018 increases the system density within a 25-rack unit footprint, optimizing the use of rack space.

The Nexus 7018 Switch dissipates up to 51,195 BTUs per hour

Whereas the Nexus 7010 Switch applies front to back airflow, and the 7010 fan module (N7K-C7010-FAN) is a smaller due to the chassis airflow is front to back.

The Nexus 7010 Switch dissipates up to 35,162 BTUs per hour.

When it comes to the Nexus 7018 Switch airflow, Panduit has an excellent solution and special rack to accommodate the airflow in a cold aisle/hot aisle data center.

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