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.

Quality of Service

Campus QoS Design

René Jorissen on June 25, 2008 • 0 Comments • Tags: #boundary #cos #dscp #policing #propagation #queuing #serialization #shaping #trust

What can somebody tell me about QoS after I passed the Cisco QoS (642-642) exam just one hour ago ?!?!?! ;-). A lot as I noticed from the session. When designing QoS SLA’s are very important. What are the required latency, jitter and data loss for the different applications, which traffic is really mission-critical and … Read More

Other stuff...

Passed Exam 642-642 Cisco QoS

René Jorissen on June 25, 2008 • 1 Comment

During the Cisco Live conference you have to opportunity to take one exam certification for free. I am currently learning for my CCVP certification. I started with exam 642-642 which is all about Quality of Service. I thought to myself: “Lets give it a try!!”. I was stunned by the passing score of 940 out … Read More

Routing

Troubleshooting EIGRP

René Jorissen on June 25, 2008 • 0 Comments • Tags: #active #black #defaultmetric #eigrp #hold #hole #in #metric #neighbors #out #redistribute #retransmit #rto #stuck #summary #table #time #topology #troubleshooting

To troubleshoot EIGRP you should obvious have a grasp understanding of the specific routing protocol. Of course this doesn’t only apply to the EIGRP routing protocol. Troubleshooting the EIGRP routing protocol on a Cisco devices is mainly about logging the correct information to a syslog server, the buffer or the console and know what the … Read More

Firewalling

Cisco Firewall Design and Deployment

René Jorissen on June 25, 2008 • 0 Comments • Tags: #access #active #asa #bridging #context #dynamic #fwsm #mixed #mode #multicontext #multicast #multiple #protocol #redundancy #redundant #remote #routed #routing #sitetosite #standby #transparant #virtualization #vpn

The session about firewall design and deployment didn’t reveal a lot of new things about the Cisco ASA appliance or FWSM module. The only new thing for me was the possibility to configure a redundant interface for a Cisco ASA appliance. The screen shot below shows the cabling scheme for an implementation with and without … Read More

Other stuff...

Cisco Live – A lot of rude people

René Jorissen on June 25, 2008 • 1 Comment

I haven’t seen so much rude people in one place during the first day of Cisco Live 2008. I noticed during all the sessions and especially during the general keynote by Cisco’s CEO John Chambers a lot of people left the room, when they noticed that the session was going to an end. I don’t … Read More

Security

Wired 802.1X

René Jorissen on June 24, 2008 • 0 Comments • Tags: #8021x #authenticate #bypass #iab #inaccessible #wired

The session about wired 802.1X deployment was really interesting. I was stunned about the information I already knew after my testing with MAC Authentication Bypass last week. Of course the speaker had more configuration options when configuring the switch ports. Important for me to hear where the ways for deploying 802.1X in environments. It isn’t … Read More