Author: René Jorissen

René Jorissen works as Solution Specialist for 4IP in the Netherlands. Network Infrastructures are the primary focus. René works with equipment of multiple vendors, like Cisco, Aruba Networks, FortiNet, HP Networking, Juniper Networks, RSA SecurID, AeroHive, Microsoft and many more. René is Aruba Certified Edge Expert (ACEX #26), Aruba Certified Mobility Expert (ACMX #438), Aruba Certified ClearPass Expert (ACCX #725), Aruba Certified Design Expert (ACDX #760), CCNP R&S, FCNSP and Certified Ethical Hacker (CEF) certified. You can follow René on Twitter and LinkedIn.

Switching

HP Blade Switch Development

René Jorissen on May 2, 2008 • 1 Comment • Tags: #3120g #3120x #blade #stack

Maybe old news for some of you, but HP has developed the Cisco switches for the HP Blade servers. The Cisco Catalyst Blade Switch 3120G and 3120X provide stacking functionality. This improves the functionality of the switches by creating a single switch from two physical switches. Source: The Cisco Catalyst Blade Switch 3120 Series Switches … Read More

Configuration Example, Routing

BGP Multihoming

René Jorissen on April 28, 2008 • 0 Comments • Tags: #as #bgp #isp #local #multihoming #remote

Today I have been playing with configuring BGP and multihoming. I configured a simple test environment where one customer router (local AS 100) connects to two ISP routers from the same ISP (remote AS 200). I configure some kind of load-sharing amongst the two links to the ISP. Important when configuring BGP is the concept … Read More

Configuration Example, Management

RADIUS Authentication

René Jorissen on April 25, 2008 • 1 Comment • Tags: #authenticate #authorization #ias #level #privilege #radius #shell:priv-lvl15

I am sure that many of you would like to do the same thing and many of you successfully configured it. I am trying to configure RADIUS Authentication on my Cisco 877W. I have two different RADIUS policies, the first for privilege level 1 and the second for privilege level 15. I am using Microsoft … Read More

Other stuff...

Network simulator

René Jorissen on April 25, 2008 • 0 Comments • Tags: #dynagen #dynamips #gns3 #network #simulator

More often I have to change critical configuration options in live environments, but sometimes I don’t no the effect of these changes on the network. So I would like to build a test network where I can check the impact of the configuration changes. A good network simulator would definitely help in this situation. Cisco … Read More

Anti-virus / Anti-SPAM, Mail relaying

LDAP and eSafe Gateway

René Jorissen on April 21, 2008 • 0 Comments • Tags: #active #directory #esafe #gateway #ldap #maxpagesize #ndr #non-delivery #objectclass #publicfolders #report

eSafe Gateway can be used for scanning incoming and outgoing SMTP connections for virusses and SPAM. Normally eSafe Gateway doesn’t check incoming mail addresses against a directory like Active Directory or Novell Directory Services. This means that all mail addresses for a trusted domain are forwarded to the internal mail server. In the most ideal … Read More

Configuration Example, IP Telephony

QoS matching for VoIP

René Jorissen on April 18, 2008 • 0 Comments • Tags: #1720 #2427 #2428 #h225 #h245 #h323 #mgcp #payload #rtcp #rtp #sccp #sgcp #signaling #tcp #udp #voip

Voice over IP is, as you know for sure, very time-sensitive traffic. That is why VoIP signaling and payload traffic should receive enough bandwidth and as less jitter and delay as possible. QoS is an important tool to assign VoIP traffic more preference over “normal” traffic. Important for QoS tools to function correctly is placing … Read More