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02-23-2015 12:00 PM
02-23-2015 12:00 PM
Customer question for HPN 6125XLG Blade Switch
Cristi had a customer requirement:
************
Dear colleagues, I have a requirement by a customer for “Bandwidth sharing capabilities per port”. Based on the 802.1Qaz DCBx support, can I say that the HPN 6125XLG switch is compliant?
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Reply from Armand:
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Yes you can: not only DCBX, but also PFC and ETS, as stated in the HPN 6125XLG guide, must be configured:
===========================================
To avoid FCoE packet loss in the Ethernet, you must perform the following configurations on the Ethernet
interface bound to the VFC interface:
- Configure data center bridging exchange (DCBX), priority-based flow control (PFC) in auto mode,
and enhanced transmission selection (ETS) on the Ethernet interfaces that connect the switch to
servers.
- Configure DCBX and PFC in auto mode on the Ethernet interfaces that connect the switch to disk
devices.
- Forcibly enable PFC on the Ethernet interfaces connected to other switches.
ETS provides committed bandwidth. To avoid packet loss because of congestion, the device performs the
following actions:
- Uses ETS parameters to negotiate with the server adapter.
- Controls the server adapter's transmission speed of the specific type of traffic.
- Guarantees that the transmission speed is within the committed bandwidth of the interface.
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