现有2台Brocade VDX 6740,OS版本是4.1.3a. 为解决某个问题，尝试升级到5.0.2.
OS升级包是从Brocade技术支持那获得，话说自己去下载的话好像很麻烦的样子，
反正他们有技术支持，让他们传的话，省时省力。
不多说了，以下是升级操作：
1.查看目前版本，
B6740-1# show version rbridge-id all
rbridge-id 1Network Operating System SoftwareNetwork Operating System Version: 4.1.3Copyright (c) 1995-2014 Brocade Communications Systems, Inc.Firmware name: 4.1.3aBuild Time: 23:11:34 Dec 18, 2014Install Time: 19:26:26 Mar 27, 2015Kernel: 2.6.34.6BootProm: 1.0.1Control Processor: e500mc with 4096 MB of memoryAppl Primary/Secondary Versions ------------------------------------------NOS 4.1.3a 4.1.3arbridge-id 2Network Operating System SoftwareNetwork Operating System Version: 4.1.3Copyright (c) 1995-2014 Brocade Communications Systems, Inc.Firmware name: 4.1.3aBuild Time: 23:11:34 Dec 18, 2014Install Time: 19:11:02 Mar 27, 2015Kernel: 2.6.34.6BootProm: 1.0.1Control Processor: e500mc with 4096 MB of memoryAppl Primary/Secondary Versions ------------------------------------------NOS 4.1.3a 4.1.3aB6740-1# 2. 备份目前的配置到U盘。#usb on
B6740-1# copy running-config usb://config.old.vcs
2015/08/05-07:17:03, [DCM-1113], 2017,, INFO, B6740-Fabric-Chassis, Running configuration file has been uploaded uccessfully to USB.B6740-1# usb dir
Rbridge-id: 1support\ 0B 2014 Mar 31 13:39firmwarekey\ 0B 2014 Mar 31 13:39firmware\ 0B 2014 Mar 31 13:39config\ 30kB 2015 Aug 05 07:17 config.old.vcs 30kB 2015 Aug 05 07:17Available space on usbstorage 99%B6740-1# usb off2015/08/05-07:17:34, [RAS-3004], 2018,, INFO, B6740-Fabric-Chassis, USB storage device disabled.Rbridge-id: 1USB storage disabledB6740-1#3.把新的OS拷到U盘上， 必须说明一点：brocade交换机识别U盘，是个很诡异的事情，如果不想出乱子，最后还是用Brocade送的U盘，而且不要把U盘的文件夹随便删除。
把OS拷贝到U盘的\firmware下。
4. 通过U盘升级
#usb on
#firmware download usb directory nos5.0.2
Performing system sanity check...2015/08/05-08:37:03, [LOG-1000], 2565,, INFO, B6740-Fabric-Chassis, Previous message has repeated 1 times.This command will cause a cold/disruptive reboot and will require that existing telnet, secure telnet or SSH sessions be restarted.Do you want to continue? [y/n]:敲下y,等它跑完就可以了。
如果你的环境像我一样有配置VCS的话，那每一台的交换机都需要升级。
升级完的结果：
B6740-1# show version briefrbridge-id all
rbridge-id 1
Slot Name Primary/SecondaryVersions Status
---------------------------------------------------------------------------
SW/0 NOS 5.0.2 ACTIVE*
5.0.2
SW/1 NOS 5.0.2 STANDBY
5.0.2
rbridge-id 2
Slot Name Primary/SecondaryVersions Status
---------------------------------------------------------------------------
SW/0 NOS 5.0.2 ACTIVE*
5.0.2
SW/1 NOS 5.0.2 STANDBY
5.0.2
比较遗憾的是，升级后并没有解决我的问题，烦...