Clik here to view.
Powerconnect Switches: Oversized Packet Counter, bcmRX task
. In a blade chassis implementation some time ago, some concerns were raised on the value of packet counters, and an inquiry on the bcmRX task. the notes i compiled as part of my reply, are as below:...
View ArticleClik here to view.
Latency, Packet loss Troubleshooting (PowerConnect, Others)
. First, know your network. know the topology. if you have a network in place where by design, the majority of the variables are deterministic & not left to chance, the task gets a lot simpler....
View ArticleClik here to view.
Powerconnect SFP/Fiber connectivity – Options, Requirements and Troubleshooting
Basic requirements for fiber connections on PowerConnect switches: MMF optical cables, LC connectors, and SFP transceivers. 1) Optical Cables : Single Mode Vs Multi Mode Single Mode cable has a...
View ArticleClik here to view.
Cisco and Force10 – STP Spanning Tree Interoperability
. Cisco Implements a proprietary flavor of spanning tree protocol, which is Per-VLAN in nature. This gives rise to certain considerations in a multi-vendor environment. Any third party switches that...
View ArticleClik here to view.
Infiniband Troubleshooting
This comes from a stack of notes i compiled when faced with issues on an infiniband deployment that needed troubleshooting. 1) InfiniBand Hardware Checks Carry out the following hardware checks:...
View ArticleClik here to view.
PowerConnect Switch Hang/Freeze – Management Interface unresponsive...
. Are you connecting to the switch via the console port(and if so, are you using the null modem cable provided, or another solution), or is this a telnet/ssh connection that you’re establishing to...
View ArticleClik here to view.
Layer 3 Switching
. The major difference between a router and an L3 switch is that packet switching in a router is done in software by microprocessor-based engines, whereas packet switching in an L3 switch is done in...
View ArticleClik here to view.
Switch Port auto shuts/ port shuts itself down – Troubleshooting
. Following is a list of vectors that may assist in troubleshooting issues where the port behavior look like it is shutting itself down. Cable/ Power Management. A link light does not guarantee that...
View ArticleClik here to view.
Layer 2 Discards Troubleshooting – RX TX Discards
. The following list of questions/vectors can assist in troubleshooting Layer 2 discard issues. They have been of help to me in the past on more than one occasion. What Switches/Models? What firmware...
View ArticleClik here to view.
Flow Control – Pause Frames
. When an Ethernet device gets over loaded, flow control allows it to send PAUSE requests to the devices sending it data to allow the over loaded condition to clear. If flow control is not enabled...
View Article