Configuration Example

802.1Q between Catalyst 3750 en PowerConnect 6226

René Jorissen on April 3, 2009 0 Comments • Tags: #6226 #8021q #acceptableframetype #catalyst #cisco #dell #general #native #powerconnect #pvid #switchport #taggedonly #trunk #vlan

Configuring a 802.1Q connection isn’t that difficult, but you need to know the command line interface and the appropriate commands. Today I configured a 802.1Q connection between a Cisco Catalyst 3750G and a Dell PowerConnect 6226, while configuring I played a little with the trunking options on the PowerConnect and I noticed the following: The … Read More

Configuration Example, Security, Switching

Layer 2 security

René Jorissen on July 6, 2008 1 Comment • Tags: #address #arp #attacks #bpduguard #dhcp #dynamic #hopping #inspection #ip #layer #mac #rootguard #source #spoofing #two #vlan

I attended the session layer 2 security, because I had some discussions about layer 2 security with one of my colleagues. We were discussing about using layer 2 security and especially implementing it in the environments from our customers. Looking at my/our customers, I don’t see environments where layer 2 threats would be immediate. But … Read More

Other stuff..., Routing

Change ESX host IP address

René Jorissen on June 5, 2008 0 Comments • Tags: #esx #failure #ha #segmentation #vlan

Monday I had to migrate an existing network. I added more VLAN’s to the network for segmentation and breaking the broadcast domain. I introduced a regular VLAN, a VoIP VLAN and a management VLAN. So far no problem. The customer is using Cisco Catalyst 3750G and Cisco Catalyst 3560 switches with PoE. I configured the … Read More