Monthly Archives: September 2013

Notes about Trunking on an HP Procurve

Specifically Trunking on the Backup VLAN (27)

The Backup Media Server has 3 NICs connected to the backup vlan. In this example, these are on ports F7,F8,F9  and assigned to a LACP trunk named Trk4.

The Backup Storage (in this case a DR4000) has four NICs connected to the backup vlan. These are on ports are f4,f10,f11,f12 and assigned to a LACP trunk named Trk6

To affect trunk configuration, you need to be at a CLI.

The GUI does not support all of the commands that we need.

SSH to the switch and log in.

Note that this access is equivalent to already being in enable mode (EN) on a Cisco device.

 

Status commands

MDF# sho trunk                 To view the trunks on the device

MDF# sho lacp  View the status of lacp interfaces

mdf# sho vlan (vlan ID) Our backup vlan is 27

mdf# sho vlan 27

 

Changes need to be made from a config prompt

MDF# config t

MDF(config)# To get out of config mode and back to the root prompt press Ctrl+Z or exit.

This is the same as Cisco IOS but doesn’t tell you that in the interface.

 

Create a trunk The example uses the interfaces that the DR4000 is connected to  the interfaces are f4,f10,f11,f12 the vlan is 27 untagged. Cisco calls that the native vlan.

An interface can only be assigned to one untagged (native) vlan at a time

Create an LACP trunk

MDF(config)# trunk f4,f10,f11,f12 Trk6 lacp

From a config prompt we just told the switch to create a trunk, containing these interfaces named Trk6 of type LACP. The trunk interface needs to be added to our backup vlan. This is a little different than Cisco IOS. HP does not treat trunks as interfaces the same way that Cisco does. In IOS we config the interface Trk6 to affect it. Here we edit the VLAN to add the interfaces.

MDF(config)#vlan 27

MDF(vlan-27)#untagged trk6

We should check the vlan members, the status of the trunk and the lacp status to validate what we just did.

To remove the trunk we remove trunking from each interface.

When there are no mambers, the trunk ID is removed.

 

MDF(config)no trunk f4,f10,f11,f12

There are occasions where LACP is still trying to negotiate and the interfaces will not be able to be taken out of the trunk. If that happens you can disable(shutdown) the individual interfaces, take them out of the trunk and enable (no shutdown) them again.

MDF(config)# int f4

MDF(eth-F4)#disable

MDF(eth-F4)#enable

These interfaces could then be added to the vlan individually,  or lacp enabled individually if needed.

Remember, if you remove all of the interfaces from a trunk it goes away. When you recreate it you will need to assign its untagged vlan again.

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How to encrypt an Excel file in Office 2003

Overview:

By default Excel 2003 encrypts password protected excel files using trivial security.
In order to use RSA or AES encryption, you must have Office 2003 service pack 1 or better and even then, only 128 bit encryption is supported. We need to expressly set the encryption type of the file before we save it.

Steps:

  1. Open the      Excel file to be encrypted
  2. From the      tools menu select ‘.’Options’
  1. In the resulting window, select the ‘Security’ tab
  1. Enter a password in the ‘Password to Open:’ box
  2. Click the ‘Advanced…’ button
  1. In the resulting window select the Microsoft      Enhanced RSA and AES Cryptographic Provider
  2. Verify that the key length is 128 and click OK
  1. Click OK
  1. You will be prompted to rekey the password for the file
  1. Enter the password and click OK
  1. Save the file

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