Search Results for: spanning tree

Default STP Behavior on Cisco Switches

Posted on January 31, 2012 by Humair

In a prior blog, Functionality of Layer 2 Switches/Bridges, I discussed the core functionality of layer 2 switches. In this blog, I hit upon the Spanning Tree Protocol (STP) used on layer 2 switches to prevent loops. As mentioned before, … Continue reading →

Posted in Cisco, Labs, Networking, Protocols, Technology | Tagged Blocking, BPDUs, bridge ID, Bridge Protocol Data Units, broadcast storm, change root bridge, Cisco, Cisco 3560, designated port, device priority, Disabled, Forwarding, layer 2, layer 2 loop, Learning, Listening, loop, MAC address, prevent layer 2 loop, prevent loop, redundancy, root bridge, root port, Spanning Tree Protocol, STP | 1 Comment

Functionality of Layer 2 Switches/Bridges

Posted on May 26, 2011 by Humair

Layer 2 switches and bridges switch frames on a network while layer 3 routers route packets between networks. I once heard a network engineer being asked if a network can be made faster if the network is optimized to use … Continue reading →

Posted in Networking, Technology | Tagged Address Learning, application specific integrated circuits, ASICs, bridges, bridging technologies, broadcasts, Cisco, collision domain, collision domains, datalink layer, filter table, Forward/Filter Decisions, frame, frame filtering, frames, layer 2 broadcasts, Layer 2 Switching, Loop Avoidance, MAC, MAC address, MAC address table, MAC database, Media Access Control, Media Access Control Address, multicasts, network, network layer, network loops, networking, packet, packets, routers, slow convergence, Spanning Tree Protocol, STP, switches, switching | 1 Comment

Dell Networking Extends Multipathing Capabilities with VLT Routing

Posted on October 12, 2013 by Humair

Dell Networking recently released enhancements to their VLT multipathing technology in FTOS 9.2 now available on S4810, S4820T, and Z9000. For a quick primer on Dell’s VLT technology read my prior blog post here. The most noticeable enhancement is the … Continue reading →

Posted in Dell, Dell Force10, Labs, Network Architecture, Networking, Protocols, Technology | Tagged Dell Force10, Dell MXL, Dell Networking, Dell S4810, Dell S4820T, Dell Z9000, FTOS, FTOS 9.2, layer 3 multipathing, layer 3 routing, layer 3 VLT, multicast routing multipathing support, multicast routing over VLT, multipathing, multipathing technology, MXL, OSPF, OSPF over VLT, peer-routing, peer-routing timeout, routed VLT, Routing over VLT, routing over VLT using OSPF, S4810, S4820T, Virtual Trunk Link, VLT, vlt domain, VLT interconnect, VLT Routing, VLT technology, vlt-peer-lag, vlt-peer-lag port-channel, VLTi, Z9000 | 3 Comments

Cisco vPC with Dell S4810 at ToR

Posted on September 21, 2013 by Humair

Cisco’s vPC technology is similar to Dell’s VLT; it enables an access/leaf switch or server to have single LAG connecting up to two separate switches. This allows for an non-blocking, multipathing scenario. You can read more about Dell’s VLT technology … Continue reading →

Posted in Cisco, Dell, Dell Force10, Labs, Network Architecture, Networking, Technology | Tagged 5548, Cisco, Cisco 5548UP, Cisco Nexus, Cisco Nexus 5548UP, Dell, Dell Force10 S4810, Dell S4810, Force10 S4810, mlag, Nexus, Nexus 5548UP, Nexus switch, port channel, S4810, S4810 switch, switch, Virtual Port Channel, vPC | 3 Comments

Search Results for: spanning tree

Default STP Behavior on Cisco Switches

Functionality of Layer 2 Switches/Bridges

Dell Networking Extends Multipathing Capabilities with VLT Routing

Cisco vPC with Dell S4810 at ToR

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