I am working on an access list for my router and am a real Nervous Nellie about it. I have a mail server with six virtual hosts and a webserver with mail and ftp as well as a hundred virtual domains, all with their own IP addresses within the same C...

Our company is growing over multiple locations to the point where we are planning to apply to ARIN for a block of 16 Class C blocks to avoid future hassles when changing upstream providers. I have no understanding of the routing issues at that level...

We are a growing, mulithomed ISP and have had continous problems with IP addresses every time we change upstream providers on either of our networks. We are interested in obtaining our own IP blocks from ARIN. It immediately came to out attention th...

I have two Serial ports in my 3640, each pointed to up a different pipe to the internet. EIGRP is running on the router. The original T1 (Serial 0) has an IP address to the provider's end of the pipe, the new interface does not. The new T1 (Serial 1)...

Got my 2621 switch up and running and started having trouble with my T1 at about the same time I put the switch in. I think the T1 is fixed but the switch is getting errors on the port the router is plugged in to. The data on the port looks like th...