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Beginner

Does Nexus 2348TQ support Flow Control autonegotiation on 10GBaseT HIF links?

Hi experts,

 

Can someone please confirm whether Nexus 2348TQ FEX supports Flow Control autonegotiation on the HIFs?  An Intel X540 10GBASET NIC is attached to it and the parent switch is running 7.1(4)N1(1), and no matter what Flow Control settings I put on the NIC side, the FEX's operational settings always reflect the administrative settings.  So it looks like the FEX does not allow Flow Control negotiation!  Please, if anyone can confirm.

 

Thanks and best regards,

Addy

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Enthusiast

Re: Does Nexus 2348TQ support Flow Control autonegotiation on 10GBaseT links?

As per the datasheet, It does support flow control.
https://www.cisco.com/c/en/us/products/collateral/switches/nexus-2000-series-fabric-extenders/datasheet-c78-731663.html

I am not sure what exactly you are trying to achieve, are you trying to configure FCoE?

Can you share the configs and logs from the nexus side
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Beginner

Re: Does Nexus 2348TQ support Flow Control autonegotiation on 10GBaseT links?

Hi nazimkha,

No FCoE.  Just wondering if this FEX can autonegotiate Flow Control, 802.3x, with a 10GBASET NIC like the Intel X540.  My finding is that Flow Control is supported but not autonegotiation, but I would like someone more experienced to confirm.  The link you pointed to mention Priority Flow Control, not plain old Flow Control.  Thanks.

 

Addy

Enthusiast

Re: Does Nexus 2348TQ support Flow Control autonegotiation on 10GBaseT links?

The link does mention support for 802.3x (flow control). Anyways you can wait for that experienced person to confirm it.

Regards,
Nazim
CCIE SP-DC, Cisco Live presenter @ Milan, Berlin & San Diego (2015-17)
Contributor

Re: Does Nexus 2348TQ support Flow Control autonegotiation on 10GBaseT HIF links?

The Nexus 2348TQ  is a low-power platform that is well suited for migration to 10GBASE-T. It supports high-density 100 Megabit Ethernet and 1 and 10 Gigabit Ethernet environments and has 48 x 100MBASE-T and 1/10GBASE-T host interface (HIF) ports as well up to six 40-Gbps uplink ports to the parent switch. The 40-Gbps uplinks support BiDi optics for simple connectivity using your existing cable plan, while lowering power and solution costs. The Cisco Nexus 2348TQ supports FCoE.
Support for both forward (port-side exhaust) and reverse (port-side intake) airflow schemes is available. Forward airflow is useful when the port side of the switch sits on a hot aisle and the power-supply side sits on a cold aisle. Reverse airflow is useful when the power-supply side of the switch sits on a hot aisle and the port side sits on a cold aisle. The Cisco Nexus 2348TQ has two 1+1 redundant hot-swappable power supplies and three hot-swappable independent fans with support for 2+1 redundancy.
The fabric extenders can be used in the following deployment scenarios:

●   Rack servers with 100 Megabit Ethernet, 1 Gigabit Ethernet, or 10 Gigabit Ethernet network interface cards (NICs); the fabric extender can be physically located at the top of the rack, and the Cisco Nexus parent switch can reside in the middle or at the end of the row, or the fabric extender and the Cisco Nexus parent switch can both reside at the end or middle of the row

●   10 Gigabit Ethernet and FCoE deployments, using servers with converged network adapters (CNAs) for unified fabric environments

●   100MBASE-T and 1/10GBASE-T server connectivity with ease of migration from 100MBASE-T to 1GBASE-T to 10GBASE-T and reuse of structured cabling

●   1 and 10 Gigabit Ethernet blade servers with pass-through blades

●   SAN connectivity (2348UPQ with 5600 only)

●   Low-latency, high-performance computing environments

●   Virtualized access

For more information, visit the Cisco Nexus 2000 Series case studies page: http://www.cisco.com/en/US/products/ps10110/prod_case_studies_list.html

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