Hi Arie,<div><br></div><div>But the problem is both the LNS would have separate loopback ip addresses configured and under virtual-template we will have ip unnumbered loopback </div><div>e.g. </div><div><br></div><div>LNS-1 <a href="http://20.20.20.1/24">20.20.20.1/24</a> loopback and Virtual template</div>
<div>LNS-2 <a href="http://20.20.20.2/24">20.20.20.2/24</a> loopback and Virtual template</div><div><br></div><div>Now say a pppoe client has configured default route towards 20.20.20.1 before failover and after failover it is now connected to LNS-2 whose ip address is 20.20.20.2, in this case pppoe client would not be able to route out to the internet as the gateway ip address is unreachable.</div>
<div><br></div><div>Another problem is connecting users whom we are going to assing /29 from separate pool than the virtual template1 (20.20.20.1 or .2) configured say <a href="http://20.20.50.0/29">20.20.50.0/29</a> etc. than how we can accommodate such users on LNS...</div>
<div><br></div><div>Please provide your inputs</div><div><br></div><div>Regards</div><div><br></div><div>Hitesh<br><br><div class="gmail_quote">On Wed, Mar 23, 2011 at 6:05 PM, Arie Vayner <span dir="ltr"><<a href="mailto:ariev@vayner.net">ariev@vayner.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">For PPPoE, you can make sessions hit both BRAS devices at the same time. The PADI is a broadcast, so would reach all of them.<br>
Each one will send a reply (PADO) in unicast, but only 1 will be the 1st one, and will be used.<br>
Statistically, the load will split because of CPU and load on the devices.<br>
<br>
Alternatively, there is a way to introduce a delay on a specific BRAS for PADO, so it will be less preferred. <br><font color="#888888">
<br>
Arie</font><div><div></div><div class="h5"><br><br><div class="gmail_quote">On Wed, Mar 23, 2011 at 11:43 AM, Hitesh Vinzoda <span dir="ltr"><<a href="mailto:vinzoda.hitesh@gmail.com" target="_blank">vinzoda.hitesh@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);padding-left:1ex">
Hi Arie,<div><br></div><div>Could you please tell me how the first hop redundancy for pppoe clients would be achieved?</div><div><br></div><div>Regards</div><div><br></div><font color="#888888"><div>Hitesh</div></font><div>
<div></div><div><div><br><div class="gmail_quote">
On Wed, Mar 23, 2011 at 4:33 PM, Arie Vayner <span dir="ltr"><<a href="mailto:ariev@vayner.net" target="_blank">ariev@vayner.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);padding-left:1ex">
Just ask the Telco to open L2TP tunnels to both LNSs. They can configure them as active/active (split the users on both LNSs) or active/passive (depends on the LAC vendor...)<br><br>Arie<br><br><div class="gmail_quote"><div>
<div></div><div>On Wed, Mar 23, 2011 at 9:26 AM, Hitesh Vinzoda <span dir="ltr"><<a href="mailto:vinzoda.hitesh@gmail.com" target="_blank">vinzoda.hitesh@gmail.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);padding-left:1ex"><div><div></div><div><div>Hi, </div><div><br></div><div>I m trying to achieve redundancy for gateway of pppoe adsl clients on LNS. My scenario is as below.</div>
<div><br></div><div>> Telco LAC sends the PPPOE session to our LNS using L2TP to LNS. It sends it to Primary LNS at all the time till the Primary LNS is alive.</div>
<div>> If primary LNS fails than Telco LAC creates tunnel to secondary tunnel. All connections are teared down and sent to secondary LNS.</div><div>> Since we know that gateway or default route configured on ADSL PPPoE clients needs to unique as these are the attributes sent out by Radius or DHCP and configured manually</div>
<div>> So in case if primary LNS fails than the IP address on virtual template on LNS should be available to PPPOE clients. I tried different ways to achieve this</div><div><br></div><div>1. HSRP on virtual-template interface is not supported.</div>
<div>2. If i use internal physical interface on both LNS and run HSRP, while having ip unnumbered fa0/0 under virtual-template configuration. The virtual template takes the physical ip address instead of virtual ip.</div>
<div><br></div><div>Lastly i thought of having anycast to have resue the situation.</div><div><br></div><div>> Configured loopback interfaces on both the LNS with the same ip address 20.20.20.1 and ip unnumbered command under virtual-template interface. This works like charm.</div>
<div><br></div><div>I m just wondering that is my solution correct or justifies the ISP LNS scenario? or what are other methods to achieve redundany in LNS for gateway ip address of pppoe.?</div><div><br></div><div>Thanks in advance</div>
<div><br></div><font color="#888888"><div>Hitesh</div>
</font><br></div></div>_______________________________________________<br>
cisco-bba mailing list<br>
<a href="mailto:cisco-bba@puck.nether.net" target="_blank">cisco-bba@puck.nether.net</a><br>
<a href="https://puck.nether.net/mailman/listinfo/cisco-bba" target="_blank">https://puck.nether.net/mailman/listinfo/cisco-bba</a><br></blockquote></div><br>
</blockquote></div><br></div>
</div></div></blockquote></div><br>
</div></div></blockquote></div><br></div>