GRE tunnel limitations
julian at elischer.org
Thu Jul 16 16:45:29 UTC 2009
Jacobs, Brian wrote:
> Does anyone have some realistic data on the number of GRE/ipip tunnels
> FreeBSD 7.x can reasonably terminate? Assume no IPsec, just standard
> encapsulation. I have an ad-hoc need to terminate about 1,4000 static
> GRE tunnels (as Cisco 7206's are backordered until September). J
> Thanks in advance!
> freebsd-net at freebsd.org mailing list
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The limitation would be that there is an interface for reach one and
the interface 'interface' uses a linked list. it might work but there
would probably be scaling issues.
I've often thought that what we need is a way to do "bulk encapsulatin
interfaces" where there is not an "interface" assigned to each
destination. (at least not one that shows up in 'ifconfig').
How will you want to decide which gre interface to use for a given
packet? is it just a standard routing decision based on the remote
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