[cisco-bba] 7204vxr as LNS - provider is LAC

[Nathan Downes]

I will look into this, might make things easier. I am not a cisco expert so slowly learning things as I need them. Takes a lot of reading and research to implement something new :) I ended up finding out that the provider was sending to the host address rather than the one I had allocated. .28 /30 and I was using .29.  Tunnel came up after they fixed that but no traffic would flow until I corrected the routing.

I am upgrading to an ASR 1004 for our core soon as I need netflow for some laws here, would it be better to use for termination than the 7204? Not a huge amount of traffic yet so guess I may as well leave it until necessary to replace with more power.

I find it kind of funny that in the end it was 9 lines of config changes that changed to terminate this whole new service.  I also had to create a new virtual template with a lower mss for it to work properly.

-----Original Message-----
From: cisco-bba [mailto:cisco-bba-bounces at puck.nether.net] On Behalf Of James Bensley
Sent: Monday, 10 August 2015 7:39 PM
To: cisco-bba at puck.nether.net
Subject: Re: [cisco-bba] 7204vxr as LNS - provider is LAC

On 5 August 2015 at 22:06, Gary T. Giesen <ggiesen+cisco-bba at giesen.me> wrote:
> In my experience it’s best to stuff the interfaces facing the provider 
> in a VRF, and point a default route out to their gateway. This way if 
> they add new routes in the future (for new LACs), you don’t need to make any changes.
> This also works very well when you have multiple loop providers that 
> use private address ranges for their LAC networks, as it ensures you 
> don’t have any conflicts with your routing.


Agreed, this is what I have been doing too. VRF per loop provider with multiple sub-interfaces, one for each loop provider one per loop provider per service, with a default route. Keeps the traffic seperate and easily measurable and a simple config to manage.

James.
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