Hi All,
I got this question while trying VPP.
I added a route pointing to gre interface:
ip route add 1.1.1.1/32 via gre0
Before configuring ip address for gre0, the route does not work and packets
are dropped with "ip4 adjacency drop".
By showing the features of gre0, only ip4-drop is enabled.
DBGvpp# sh int feat gre0
ip4-unicast:
ip4-drop
Then I configured an IP address on gre0, and it works now.
DBGvpp# set int ip add gre 9.9.9.100/32
DBGvpp# sh int feat gre0
ip4-unicast:
<--------------ip4_drop node is gone.
My question is: why the ip address is mandatory for a point-to-point
interface? Is there any special designed reason?
>From user's perspective, we don't need an ip for gre interface.
GRE is served as an encap string only (Like the implementation of linux).
Thanks,
Wenxian
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