Nathan wrote:
On Fri, Oct 24, 2008 at 5:24 PM, Bruce Robertson <[EMAIL PROTECTED]> wrote:
If I remember correctly, the 1751 supports L2TPv3. You could add another
Ethernet interface to the 1751 (the WIC-4ESW is handy for that, or
WIC-1ENET), insert it between the 871 and customer, and bridge the Ethernets
through, without killing MTU.
Sounds doable. So with a 1751, I should be able to do an xconnect on
each of my two interfaces, and thereby string two L2TPv3 pseudowires
beteen my sites?
That's correct. It gets messier if you need to tie multiple sites into
one broadcast domain, but it's still doable. The only difference there
is that you need to terminate all the L2TPv3 pseudowires at your central
site, burning a router Ethernet interface for each one, and then tie
them all together with a switch. It doesn't scale well. If there's a
simpler way, hopefully someone on the list will point it out.
With two 1751s I don't suppose I'll need the 871s though (my need is
connecting LANs site A - my871 - ethernet - ethernet2ATMconverter -
ATM - 7200 - ATM - ethernet2ATMconverter - ethernet - my871 - LANs
site B, where the LANs are currently two untagged RJ45s on each side
but could be a single RJ45 with a dot1q trunk).
Yes, assuming the ATM is DSL, the 1751 can do the DSL directly. You
wouldn't need the extra Ethernet interface in that case. I don't know
anything about 871s; are you using any special features that the 1751
can't do?
BTW, you'll need IOS 12.4 on the 1751 to do the L2TPv3.
In your opinion, no way of doing it with L2TP on my 871s?
Dunno, I tend to avoid L2TP non-v3. v3 has worked very well for us.
--
Thanks for your help,
Nathan
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