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GRE Tunnels with iproute

May 23rd, 2010

Marco wrote a useful post yesterday about some less widely known features of iproute.

I didn't know about the dummy interface:

ip link add mydummy type dummy

but I've definitely used the tun/tap driver before. I always forget the syntax so I'll jot it here for reference:

ip tuntap add dev mytap mode tap user albertlash

Also mentioned is one of my all-time favorite iproute features: GRE tunnels!

ip link add blah type gretap remote
ip link add barf type gretap help

I'm thrilled that pfsense will soon include GRE tunneling support!

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