Here are the relevant parts of the configuration to setup an etherchannel between an IOS device and a CatOS device. First lets start with the CatOS device, in this case a 6509. We will be using ports 3/9 and 3/10.
We first need to set the ports we want to use to be a trunk. Here we are forcing dot1q.
6509#set trunk 3/1-2 nonegotiate dot1q
Now we need to setup the port channels. These channels will be used as 1 and aggregate bandwidth between them.
6509#set port channel 3/9-10
Note: There is an option at the end of this command to specify the admin group. This is how the CatOS groups the ports. If you do not specify the admin group, the CatOS will automatically assign one. This is something to watch out for if you set each port separately.
Continue reading ‘Cisco IOS to CatOS Etherchannel Configuration’
Adding a switch to a VTP domain is fairly easy to do, but done incorrectly, can bring down a whole network. Fortunatly I have not had this happen to me, but I have heard horror stories. There are a few simple steps to take to make sure everything stays running smoothly.
The very first step to complete as soon as you are ready to put a new switch on a network and join it to the domain, is to make sure that the vtp mode is set to transparent. Setting the mode to transparent ensures that the “Configuration Revision” is set to 0. If the switch has been used in a lab and has vlans configured and a configuration revision that is higher than the domain server, even if the switch being added is in client mode, it will overwrite the server and propagate all of it’s vlans across the network.
Continue reading ‘Adding a Cisco switch to a VTP domain’
VTP domains allow you to manage all of your vlans from a central switch. This can be a great tool if you are dealing with a large number of vlans spread out over multiple switches. There are a couple of issues that you must be careful of when you implement a vtp domain, which I will go over shortly.
The first requirement is to make sure that your trunks between switches are up and working.
Continue reading ‘Configuring a VTP domain on Cisco switches’
While trying to setup Vista to connect to new client’s network using a VPN, I kept running into problems and could not get it to connect. I was attempting to connect to a PPTP VPN on a Pix 500 series firewall. The error I kept getting was “Failed to connect to VPN Connection”. I tested the connection with XP and was able to connect without any issues.
Continue reading ‘Vista VPN to Cisco Pix devices’
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