Here are some packet overhead numbers for a few popular protocols to help with doing bandwidth requirement calculations.
Posts Tagged ‘ gre ’
Stubby Post – A Story on VPN Hardware Acceleration
We use a hosted application that requires IPSec tunnels to the provider from different properties across the country. The ones in the lower 48 perform adequately, but the new one in Alaska is absolutely horrible. Aaron ConawayI like to lean my head to the left, hit it with the palm of my right hand,...
QoS Pre-classify and Class-map Order
I’m still studying for the ONT test, so I did some labs tonight. One of them was to demonstrate the qos pre-classify command for tunnel interfaces. When you have a packet sent over a GRE tunnel, the ToS field gets copied to the GRE packet, but there’s no way to see the original packet’s...
GRE Tunnels and Encryption
GRE tunnels rock. They are interfaces on a router that are used to “connect” to another router somewhere on your LAN, your WAN, the Internet, wherever. The most popular use for them is for router-to-router VPNs. I’ll let my friend Josh from blindhog.net show you how to do it. He’s got a video on...
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