关于HCA卡的node guid 和port guid-优快云博客

本文介绍了HCA卡中nodeGUID和portGUID的概念及其生成方法。通过实例展示了如何从HCA卡获取这些GUID，并解释了portGUID是如何通过对nodeGUID的最后一位加1得到的。这对于理解InfiniBand网络配置至关重要。

关于HCA卡的node guid 和port guid

参考文章:
How to Identify What HCA GUID to use for a PXE and SAN Boot Configuration for OVN Connected Servers (文档 ID 1528080.1)

During computer boot up, the HCA node GUID with be displayed on screen as the XgBoot option rom loads up. 
Just add 1 to the last digit of the node GUID to derive the port GUID.

实际的例子:

[root@rac1 ~]# ibstat
CA 'mlx4_0'
	CA type: MT4099
	Number of ports: 2
	Firmware version: 2.34.5000
	Hardware version: 0
	Node GUID: 0x7cfe900300917ed0---------------------->7ed0
	System image GUID: 0x7cfe900300917ed3
	Port 1:
		State: Active
		Physical state: LinkUp
		Rate: 56
		Base lid: 1   --------------------->>>此处的lid 是Local ID (LID)的意思.
		LMC: 0
		SM lid: 7
		Capability mask: 0x0259486a
		Port GUID: 0x7cfe900300917ed1--------------->7ed1=7ed0+1
		Link layer: InfiniBand
	Port 2:
		State: Active
		Physical state: LinkUp
		Rate: 56
		Base lid: 8
		LMC: 0
		SM lid: 7
		Capability mask: 0x02594868
		Port GUID: 0x7cfe900300917ed2--------------->7ed2=7ed1+1
		Link layer: InfiniBand
[root@rac1 ~]#