Jun 06 2021
I asked my reseller a quote for some Cisco Catalyst switches as usual, and he tells me most of his clients buy Cisco Small Business switches. He argues they are much cheaper, have similar performance and features. Checking on some forums, I get no real answers but vague statements like it is not a real […]
May 06 2015
Different methods exists to filter out mac addresses on a switch such as:– port security,– mac access lists or even– 802.1x port-based authentication with Radius. Mac access ACL require a higher end switch while 802.1x authentication is a pretty heavy setup and needs to manage a mac address database on a Radius server.Port security allows […]
Oct 24 2013
Having a DHCP relay on a layer 2 switch is usually a nonsense. However, a DHCP server happened to crash and I had no access to configure a new DHCP service on a remote site.My only option was to set a DHCP relay on the switch that will forward requests to another site to avoid […]
May 11 2013
Radius servers generate a lot of accounting records. Is it worth keeping them? Of course! Beside the fact they could be used to check if a customer was connected at a given date, or find out who got IP address X.X.X.X that same day, the most interesting is to generate Freeradius traffic usage graphs and […]
Feb 05 2013
SNMP is a protocol widely used to get a lot of metrics from network hardware, servers and others. I configured SNMP on the internal interface of a Fortigate 100D from Fortinet. Even though I ticked the checkbox called “enabled”, I am getting a timeout when I run cfgmaker (to configure MRTG) or snmpwalk tools. No […]