The “class D” multicast address range is 224.0.0.0 to 239.255.255.255, with the private range falling between 239.0.0.0 to 239.255.255.255
This configuration tests multicast routing configurations using VLC: Read more…
This is a simple example and step-by-step configuration of two LAN segments connecting over a Frame Relay WAN link. IPv6 Addressing is used. Read more…
This design shows how to ensure load balancing and resilience of Wireless Access Points connected to Two WLCs (Wireless LAN Controller). The access points may also be placed into separate VLANs a per-vlan spanning-tree used to ensure and even more resilient design!
“ip route-cache” controls the use of switching methods for forwarding IP packets:
ip route-cache [same-interface | flow | distributed | cef | policy]
Read more…
The 3550 WRR (weighted round robin) scheduler algorithm utilises four configurable queues at each interface of the switch. Let’s consider just FastEthernet ports for simplicity in this post. For each queue, the following important parameters could be configured: Read more…
Computed cost
Each interface has an associated cost. It is computed as follows: Read more…
Permanently delete data from your computer with a “Government Wipe” standard of removal. This is to be recommended, especially is you resell your computer. Read more…
An aide-memoir, cum cliff-notes:
VTP version 3 differs from earlier VTP versions in that it does not directly handle VLANs. VTP version 3 is a protocol that is only responsible for distributing a list of opaque databases (somewhat like like LDAP!) over an administrative domain. When enabled, VTP version 3 provides these enhancements to previous VTP versions: Read more…
I was recently asked a question about port numbers on web servers. This answer will apply to any DMZ host, whether http, ftp, telnet or ssh.
The question as phrased was:
If you decided to use a different port for your web server (say port 8080), how would a user make requests to your web server?
