Here's a quick post on my Uplinkfast findings.
Posts Tagged ‘ switch ’
Stubby Post – Path Cost of EtherChannels
A quick observation the STP path costs and EtherChannels
Using SSH to Run Commands on a Router or Switch
SSH is more than just a shell. You can copy files from and to a server or piece of network gear with it. You can use it to tunnel traffic. Possibly my favorite, though, is to use SSH to run a command on a remote box without interacting with a shell. One of my...
Server NIC Aggregation to a Cisco Switch
Have you even noticed that your new servers all have 2 NICs on the board? At least all of them that I’ve seen in the last 3 years have. A lot of server admin actually use them in a NIC teaming scenario where both NICs are used as one logical device — much the...
RSPANs on Cisco Switches
We discussed SPANs earlier, but let’s talk about RSPANs for a bit. Can anyone guess what the “R” means? You guessed it — “Remote”. An RSPAN is a way to get traffic from a SPAN source on one switch to a SPAN destination on another switch that’s connected via a trunk. The basic premise...
SPANs on Cisco Switches
I can’t believe I haven’t blogged on this yet. SPANs are one of my favorite things in the world. The switched port analyzer (SPAN) is a mechanism on Cisco switches that allows you to take traffic on one port and copy it to another. It’s generally used to get traffic to a sniffer or...
VLANs on Linux
My home network has a Linux box running IPTables as it’s center point, and, since there are four networks, it has 4 NICs and 4 cables into the switch. I kept running into problems with the NICs (they would reorder depending on what flavor of Linux was installed), so I wanted to consolidate the...
Mixed-platform LANs and Spanning Tree
We just an HP C-class blade chassis which included two GbE2c network modules. These modules are Nortel switches running AlteonOS that connect the blades to the rest of your network. When I turned these guys up the other day, every VLAN stopped working, so I ran down to the data center and unplugged the...
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