Rapid Spanning Tree Protocol IEEE 802.1D – original STP, topology change takes 30 seconds before port goes from blocking to forwarding IEEE 802.1w – RSTP, much faster convergence, as with STP can be applied as a single instance or multiple instances by using RSTP with Cisco’s own PVST+, resulting in Rapid PVST+. Can also be […]
Switch Port Aggregation with Etherchannel 2 to 8 links of 100mb, 1gb or 10gb can be bundled as one logical link of Fast Etherchannel (FEC), Gigabit Etherchannel (GEC), or 10 Gigabit Etherchannel (10 GEC) respectively, giving a full duplex bandwidth of up to 1600mbps, 16gbps or 160gbps. There are no spanning tree issues […]
Static VLANs Port-based membership. End user devices are members of VLANs based on the physical switchport they are connected to, and are not aware of which VLAN they are in. Ports are assigned to VLANs by an administrator and the port receives a Port VLAN ID (PVID) that links it to a VLAN number. Switchports […]
Ethernet Ethernet (10Mbps) – IEEE 802.3, 10mbps bandwidth between users, shared medium, both a collison domain and and a broadcast domain, CSMA/CD = half-duplex operation, more devices sharing the medium = more collisions = poor performance. Ethernet switching allows full-duplex operation due to the fact that the switch dynamically allocates a dedicated 10Mbps to each […]
Layer 2 Switch Operation An ethernet switch decides where to forward incoming frames based on the destination MAC address contained within the received frame. Using this method means that the ethernet media is no longer shared between all connected devices. A switch will not forward a frame unless it knows which switch port the destination […]
As part of my prep for the exam, I attended the Implementing Cisco IP Switched Networks training course in Manchester this week. The course was run by QA Training and delivered by an instructor from Fast Lane. The course follows the official Cisco curriculum and for the lab exercises the students work in pairs on actual […]
So, to achieve my goal of Cisco CCNP status, I need to pass 3 exams: SWITCH – Implementing Cisco IP Switched Networks ROUTE – Implementing Cisco IP Routing TSHOOT – Troubleshooting and Maintaining Cisco IP Networks There’s no right or wrong order to take the exams in although it makes sense to take TSHOOT last. […]