Schlagwort: todo

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Configure RMON Alarms&Events by script

Getting back to the original task..
Use a script on a centralized Controller-VM to figure out for which SNMP-OID RMON-Alarms should get configured

Get all current QoS-Drop-Counters, check the traffic-direction to monitor only outbount-queues, generate RMON-Alarms.

hostname = "192.168.2.72"

session = Session(hostname, community='READ', version=2)

cbqos = session.walk('1.3.6.1.4.1.9.9.166.1.15.1.1.13')

cmds = ["Configure on Host \""+hostname+"\"\n---"]
cmds.append("rmon event 10 log owner RMONevent")
cmds.append("rmon event 11 log owner RMONevent")

alarmID = 10001

for i in cbqos:
  oidList=i.oid.split(".")
  q=oidList.pop()
  p=oidList.pop()
  #print p,q
  ifTypeID=int(session.get("1.3.6.1.4.1.9.9.166.1.1.1.1.2."+p).value)
  ifDirID=int(session.get("1.3.6.1.4.1.9.9.166.1.1.1.1.3."+p).value)
  if (ifDirID==2):
    cmds.append("rmon alarm "+str(alarmID)+" "+i.oid+" 300 delta rising-threshold 1 11 falling-threshold 0 10 owner RMONevent")
  alarmID += 1

for cmd in cmds:
  print cmd

Example Output:

Configure on Host "192.168.2.72"
---
rmon event 10 log owner RMONevent
rmon event 11 log owner RMONevent
rmon alarm 10001 enterprises.9.9.166.1.15.1.1.13.18.65536 300 delta rising-threshold 1 11 falling-threshold 0 10 owner RMONevent
rmon alarm 10002 enterprises.9.9.166.1.15.1.1.13.18.131072 300 delta rising-threshold 1 11 falling-threshold 0 10 owner RMONevent
rmon alarm 10003 enterprises.9.9.166.1.15.1.1.13.18.196608 300 delta rising-threshold 1 11 falling-threshold 0 10 owner RMONevent
rmon alarm 10004 enterprises.9.9.166.1.15.1.1.13.34.65536 300 delta rising-threshold 1 11 falling-threshold 0 10 owner RMONevent
rmon alarm 10005 enterprises.9.9.166.1.15.1.1.13.34.131072 300 delta rising-threshold 1 11 falling-threshold 0 10 owner RMONevent
rmon alarm 10006 enterprises.9.9.166.1.15.1.1.13.34.196608 300 delta rising-threshold 1 11 falling-threshold 0 10 owner RMONevent

Todo: Verify existing RMON-Alarm/Event-Configuration at the device
Todo: Push the config automatically to the device

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Linux: Quick and Clean Lab-VM Deployment

I often need for quick tests a clean Linux Server, a VM nowadays.

I decided to save DRAM in my virtualization host and to:

  • not use a GUI
  • SSH with standard text-editor are quite fine for me.

Ubuntu 16.04 seems to be a good choice to start with.

  1. Apply Updates,

sudo apt-get update && sudo apt-get upgrade -y

  1. install a text-editor //I like joe since it remembers me of turbo-pascal/wordstar 😉

sudo apt-get install joe

  1. change the hostname of the server-vm
sudo joe /etc/hostname
sudo joe /etc/hosts
  1. add a reliable (static) IP-Address
sudo joe /etc/network/interfaces
# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto ens160
iface ens160 inet static
address 192.168.2.89
netmask 255.255.255.0
gateway 192.168.2.1
dns-nameservers 192.168.2.1
dns-search lab.local
  1. reboot the VM

There are other possibilities, but just ifdown/ifup won’t stop the dhcpd-client – the easiest way [but uncoolest, who cares?] is to reboot the VM, takes half a second…

sudo reboot

 

Todo: Create an UCSD-Workflow for this

Todo: Fix the buggy „always 1“ section-numbering

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Cisco CLI syntax highlighting

It’s hard to believe that syntax highlighting, manual or automatic, is so hard in 2017…

Really no CLI-/Sourcecode-Plugin that fits my needs available:

  • bold font for relevant commands, in the example ’show…‘
  • colour background for interesting parts of the show-output
N9K-A# show vlan id 123

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
123  010.002.003.004                  active

That’s all I’m looking for…