Configuration Example, Routing

Cisco DHCP server & VRF

René Jorissen on December 12, 2012 4 Comments • Tags: #cisco #class #connected #dhcp #excludedaddress #exclusion #ios #server #use #vrf

I had some issues while configuring some VRF’s on a Cisco router and using that router as a DHCP server. First of all the router wasn’t binding any DHCP request. The DHCP server configuration is defined below. ip dhcp pool guest vrf vrf-guest network 10.10.0.0 255.255.252.0 default-router 10.10.0.1 domain-name internet-only.nl dns-server 208.67.222.222 208.67.220.222 The configuration … Read More

Configuration Example, Switching

HP A4800G – DHCP relay

René Jorissen on June 29, 2012 0 Comments • Tags: #4800g #a4800g #dhcp #enable #hp #relay #server #servergroup

This article isn’t very difficult and spectacular. It is just for me as a quick note to configure DHCP relaying on a HP A4800G switch. The configuration of this type of switch is a little different compared to Cisco and/or legacy HP ProCurve switches. The following steps are required to configure DHCP relaying: <SW01>system-view System … 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