[55911] in North American Network Operators' Group
VoIP over IPsec
daemon@ATHENA.MIT.EDU (Charles Youse)
Sun Feb 16 18:48:44 2003
Date: Sun, 16 Feb 2003 18:47:02 -0500
From: "Charles Youse" <cyouse@register.com>
To: <nanog@nanog.org>
Errors-To: owner-nanog-outgoing@merit.edu
Hello again,
I've heard a lot of encouraging things on this list in response to my =
previous inquiries about VoIP - hoping you can help me out again.
In order to cut costs in our telecom budget I'm toying with the idea of =
replacing a lot of our inter-office leased lines with VPN connections =
over the public Internet. (I've got a lot of experience doing this in =
major production environments so I'm aware of the gotchas in this =
scenario.) My general method is to create IPsec-encrypted GRE tunnels =
between sites and then treat them as true virtual circuits; i.e., I run =
OSPF over the tunnel and exchange dynamic routing information, =
blah-de-blah.
Assume for the moment that latency and bandwidth are not an issue; e.g., =
any two points that will be exchanging voice data will both have transit =
from the same provider with an aggressive SLA.
Does anyone have any experience running VoIP over such tunnels? Is =
there a technical reason why this solution is not feasible? Are Cisco =
routers not happy doing VoIP/IPsec/GRE in concert?
Thanks as always,
C.
