by Tony Mattke on September 26, 2011
My most recently collection of interesting bits of data found out on the blogsphere/internets. Due to my lack of time, I’ve decided to recycle what I find out on the ‘net and share it here. Please bare with me while I try to come up with an interesting name for such an unoriginal type of post.
Juniper/Junos Portable Library
Greg Ferro ala Etherealmind.com posted an interesting link. Instead of hiding their documentation behind a pay-wall, Juniper has supplied all of it via a mutli-part zip files. As Greg mentioned, loading these on your iPad is a great option for the engineer on the go! [link]
Cisco’s failure to provide IPv6 – Updated!
Ivan Pepelnjak from ioshints.info has some pleasant surprises for us in the Cisco-land with an update on Cisco’s IPv6 support in their data center products. [link]
Nexus 1000v features
Yandy Ramirez aka Packet Maniac has put together a great Mindmap detailing the features of the Nexus 1000v. [link]
IOU – IOS on Unix
More news from Jeremy Gaddis ala Evilrouters.net. He has not only documented the use of, but improved the functionality of the iou2net.pl perl script that replaces the functionality of the hard to come by IOUlive. [link]
Cisco Phone Cheat Codes?
Yes, you had to read that title twice. Tom Hollingsworth aka Networkingnerd.net has put together a cheat sheet for those of us that tend to forget the keypad shortcuts for Cisco’s phone line. [link]
by Tony Mattke on May 6, 2011
IP SLA is a function of Cisco’s IOS enabling you to analyze a Service Level Agreement (SLA) for an IP application or service. IP SLAs use active traffic-monitoring to continuously monitor traffic across the network. This is very different from SNMP or Netflow data which give you more volume oriented statistics. Many different metrics can be analyzed using IP SLA, here is a break down of a few.
- UDP Jitter – Probably the most used operation in all of IP SLA. This IP SLA generates UDP traffic and measures Round-trip Delay, One-way Delay, One-way Jitter, One-way Packet Loss, and overall Connectivity.
- ICMP Path Jitter – Hop-by-hop Jitter, Packet Loss, and Delay.
- UDP Jitter for VoIP – Enhanced test for VoIP monitoring. It can simulate various codecs and spits out voice quality scores (MOS, and ICPIF). Also shows us Round-trip Delay, One-way Delay, One-way Jitter, and One-way Packet Loss.
- UDP Echo – Round-trip Delay for UDP traffic.
- ICMP Echo – Round-trip Delay, full path.
- ICMP Path Echo – Round-trip Delay and Hop-by-hop round trip delay.
- HTTP – Round-trip time using simulated http traffic.
- TCP Connect – Allows us to sample the time to connect to a target using TCP.
- FTP – Round-trip time for file transfers.
- DHCP – Round-trip time for dynamic host configuration.
- Frame-Relay –Round-trip Delay, and the Frame Delivery Ratio. Mostly used for circuit availability.
[ read more... ]
by Tony Mattke on April 22, 2010
This is the fourth and final part of my Cisco voip basics series. ( Parts 1, 2 & 3 ) Our goal in this series has been setting up a working voice gateway that you could use in your home office. In this post were going to cover a very specific issue. How do you ring yours FXS line(s) and your ephone-dns’s?
You can’t
As it turns out, in CME, you can’t do it. I’ve looked everywhere I can think of for an answer to this and have found that CME is lacking in features. At least on the platform that I’ve been using for this tutorial. Here is what I’ve tried.
[ read more... ]
by Tony Mattke on September 8, 2009
This is the third part of my Cisco voip basics series. ( Parts 1, 2 & 4 ) Our goal is to help you configure a Cisco voice gateway that you could use in your home office. This section is going to cover setting up your dial plans, and connecting to an external POTS line.
In our very first part of this series we talked about configuring a very basic dial peer as shown below. These work by matching a destination-pattern to a port. Simply stated, when the pattern is met, the call goes out that port, this works for both FXS and FXO ports.
[ read more... ]
by Tony Mattke on August 24, 2009
This is the second part of my Cisco voip basics series. ( Parts 1, 3 & 4 ) Our goal in this series is to setup a working voice gateway that you could use in your home office. The following covers installation of CME 4.1, and the setup of a Cisco 7960 ip phone on the voice gateway.
[ read more... ]
by Tony Mattke on August 20, 2009
This is the first part of my Cisco voip basics series. ( Parts 2, 3 & 4 ) VOIP is obviously becoming a large part of networks, even now part of your CCNP requirements are basic voip knowledge. Recently I have been setting up Cisco Call Manager Express for my home / home office and I figured a short VOIP series would benefit those of you who have never had to deal with setting up a PBX or VOIP system. While I’m not going to delve into the nitty gritty details of voip ( since you could dedicate an entire blog to it ) I will try to point you in the right direction for setting up CME on your own.
[ read more... ]
Recent Comments