March 2014 – Linux Administration

ESXi 5.5 iSCSI MTU

Get list of networks/MTUs

esxcfg-vmknic --list

Set MTU

esxcfg-vmknic --mtu 9000 "Management Network" esxcfg-vmknic --mtu 9000 "iscsi-name"

Debian 7 LACP Bonding /etc/network/interfaces

/etc/network/interfaces

auto bond0 iface bond0 inet static address 10.10.0.100 gateway 10.10.0.1 netmask 255.255.255.0 slaves eth0 eth1 eth2 bond-mode 802.3ad bond-miimon 100 bond-lacp-rate 4

ExtremeWare configuration

As you may be able to guess, this configures ports 41, 42 and 43 for LACP

enable sharing 41 grouping 41,42,43 dynamic

Enable Write Cache in Linux/ESX 5.5 on HP Servers

If not running ESX, ignore the “esxcli” portion.

Get the Slot # of your controller

esxcli hpssacli cmd -q "controller all show detail"

Apply the change (this will force write cache even if the battery is low/missing)

esxcli hpssacli cmd -q "ctrl slot=1 modify dwc=enable forced"

Tested on an HP DL380 G5 (ESX 5.5)

Summit 400-48t Enable Advanced Edge License

I noticed the license is a length 7 numeric value, so I modified an existing script floating around for the Summit 400-48t. Should work with any Summit 200/300/400 however.

You may need to modify the “Summit400” near the end of the file to match your prompt. This runs much quicker than I’d think; got my license after 4 hours or so.

Uncomment the dump.log line if you have trouble to debug

#!/usr/bin/perl use Net::Telnet; use warnings;


$t = new Net::Telnet(

    Timeout => 10,

#    Dump_Log => "dump.log",

    Prompt => '/\* Summit*$/',

    Errmode=>'die'

);

$t->open('SWITCHIPADDRESS');

$t->waitfor('/login: $/i');

$t->print('admin');

$t->waitfor('/password: $/i');

$t->print('YOURPASSWORD');

$t->waitfor('/Summit400/i');
for($x = 1; $x < 9999999; ++$x)
{
    print "Trying: $x\n";
    #@lines = $t->cmd("enable license advanced-edge $x");

    $t->print("enable license advanced-edge $x");

    $t->waitfor('/Summit400/i');

}