The fix was "switchport nonegotiate" to turn off Cisco DTP which is enabled on Cisco ports by default.<br><br><a href="http://packetlife.net/blog/2008/sep/30/disabling-dynamic-trunking-protocol-dtp/">http://packetlife.net/blog/2008/sep/30/disabling-dynamic-trunking-protocol-dtp/</a><br>
<br>As I suspected, they had speed nonegotiate confused with switchport nonegotiate.<br><br>Everything is now working.<br><br><br><div class="gmail_quote">On Thu, Mar 11, 2010 at 3:25 PM, Gerald Krause <span dir="ltr"><<a href="mailto:gk@ax.tc">gk@ax.tc</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Am 11.03.10 22:15, schrieb George B.:<br>
<div><div></div><div class="h5">> I am working on a new deployment in Verizon data center in Europe. We<br>
> have an MLX with LX optics. Our two routers link fine but when we<br>
> connect the uplinks to Verizon, no link. I have tried everything I know<br>
> such as rolling xmit/receive, changing negotiation, etc. The config is<br>
> REALLY simple, just an IP address, route-only on the interface, and no<br>
> spanning-tree. Links fine between MLX units, will not link to Verizon's<br>
> cisco.<br>
><br>
> I recall having this same problem with vendors using Cisco in the past<br>
> (Level3, Savvis UK) and it took them a while to figure it out but they<br>
> have always done something that allowed things to work eventually.<br>
> Anyone have the magic clue I can pass to VZB to make this thing work?<br>
<br>
</div></div>If you have an solution - let me hear. I'am still unable to connect a<br>
new XMR to an old Cat5000/SUP3 with GE-SX. Because I've tried any<br>
combination of interface settings on both the XMR and the Cat5000 side,<br>
I doubt that they ever will see each other (I hadn't this problem with<br>
our oldish Foundry NI800).<br>
<font color="#888888"><br>
--<br>
Gerald<br>
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