HSRP (Hot Standby Router Protocol) is a Cisco-proprietary method for supplying a highly-available gateway for hosts to use. GLBP (Gateway Load Balancing Protocol) does the same thing. So, what’s the difference? HSRP works on layer 3 and provides a standby IP address for hosts on that network to use as their gateway (or other...
Daily Archives: March 18, 2008
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...
Resetting Sections of the Config
I was configuring a switch the other day and realized I had configured a trunk on the wrong port. God, I hate that. Instead of dumping the configuration for the port and doing a “no” on each line, I used the default command. Switch(config)#default interface G0/1 This resets the configuration on interface G0/1 to...
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