We look after a series of restaurants which is a collection of point of sale terminals and a typically a single workstation per site. We have one site that is causing a fair amount of head ache and no amount of google searching is answering the question. In one particular site the network keep crashing. … Read more
: The spanning-tree root for vlan 1050(192.168.50.0) is Core2 : The spanning-tree root for vlan 1020(192.168.20.0) is Core1 I was trying to add some redundancy to my network and added the links from switch 1 -> switch2, and switch2 -> switch3. I noticed by using SPANs and a packet sniffer that traffic being originated in … Read more
We have 3 switches – a Core Switch, and 2 downstream switches. Each downstream switch has a 3 cable Trunk direct to the core switch. However – when we disconnected one cable in that trunk group (still leaving 2 physical links in that trunk group online) we lost all connectivity from that switch to the … Read more
I am having a Switch Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 12.2(50)SE4, RELEASE SOFTWARE (fc1) I have interface FastEthernet0/1 up to interface FastEthernet0/48 are configured as switchport access vlan , switchport mode access, no cdp enable. and spanning-tree mode pvst spanning-tree extend system-id My question is, whether it is possible to bridge two ports … Read more
I have several IoT devices that will sporadically come into and out of range, and connect in a partial mesh topology. For illustration purposes, imagine the interconnectivity of a Web of Trust, or Social Graph … each has similar properties. What protocols are able to handle sporadic connectivity, and limit inefficient circular routing? This is … Read more
The scenario: A network topology consiting of a few layer 2 switches with some end devices on the edges. The pairs of end devices are in the same VLAN, a spanning tree protocol like MSTP created active topologies for each of the VLANs. Now the questions: Is there a way to choose the MSTs automatically … Read more
Is it possible to use SNMP to read the spanning-tree status from Arista switches? Although it is possible to set up SNMP traps for spanning-tree, I did not find anything related to spanning-tree in the Arista SNMP MIBs list, or any mention of the possibility of querying STP status via SNMP in the documentation. We … Read more
We have three 24 port (Gigabit) Netgear GS724T switches which are connected in the following way: SW-003 > SW-001 > SW-002 The port on SW-002 that connects to Sw-003 is constantly flashing once per second, the rest are flickering as the data is transferring as expected. I am concerned that this may mean that we … Read more
Today, A tech at a remote server site unplugged a single port from one of our fiber converters for our WAN uplink from a Dell PowerConnect Switch. We lost all networking on the 3 stacked 48 port switches for a while, and looking at the log, it appears that removing that one port (which is … Read more
We are having an intermittent issue with a campus of Alcatel-Lucent Omniswitch switches, ranging from model 6000 to 6850. We are having a problem tracking down the root cause of our issue. The seems to be some rogue traffic or something causing all of our switches to slow to a crawl. Connecting to the console … Read more
