Yeah right...good info. thanks. What if HSRP doesnt have preempt so it wont switch back after a failure?
Im thinking of dual protection. LACs has two initiate-to commands for 2 LNS. Then LNS with HSRP without preempt. any thoughts? ________________________________ From: Arie Vayner (avayner) <[email protected]> To: ar <[email protected]>; cisco-nsp <[email protected]> Sent: Friday, May 4, 2012 12:42 AM Subject: RE: [c-nsp] 7206 LNS/L2TP using HSRP With HSRP, every time you do a failover, all sessions would drop, and have to be reestablished. Using the redundancy model, you can have graceful recovery and switchover if you want to control it. For example, if you had a failure, and one LNS went down, all sessions would reestablish on the 2nd one (that is the same as in HSRP), but now when the other box comes up it does not drop all the sessions again and switches them back. Only new sessions would be sent to the recovered LNS, and you can move the other sessions during a maintenance window… Actually, I would just suggest running them in active/active mode. This way you actually know they are both up and running and do not have to worry about making sure the backup is ready… Arie From:ar [mailto:[email protected]] Sent: Thursday, May 03, 2012 07:27 To: Arie Vayner (avayner); cisco-nsp Subject: Re: [c-nsp] 7206 LNS/L2TP using HSRP Thanks Arie. Any disadvantage of using HSRP compared to multiple initiate-to commands on the LAC? I want HSRP due to the reason i can control who is the active and standby LNS. LNS is mine, while LAC is on the access provider side. thanks ________________________________ From:Arie Vayner (avayner) <[email protected]> To: ar <[email protected]>; cisco-nsp <[email protected]> Sent: Thursday, May 3, 2012 7:09 PM Subject: RE: [c-nsp] 7206 LNS/L2TP using HSRP Better use discrete IP addresses. Loopbacks are mostly recommended. On your LAC you can specify multiple IPs (that can come from RADIUS...). This would allow you to load share, running your LNSs in Act/Act mode... Look here: http://www.cisco.com/en/US/tech/tk827/tk369/technologies_white_paper09186a00800a43e9.shtml#wp1002265 Arie -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of ar Sent: Thursday, May 03, 2012 00:37 To: cisco-nsp Subject: [c-nsp] 7206 LNS/L2TP using HSRP Guys, I'm planning to terminate L2TP to LNS using HSRP. So there will be LNS redundancy. Is this possible? I've read that terminating L2TP to the HSRP address has some issues. Or better to use multiple initiate-to commands on the LAC? Any other options for fail-over/redundancy? thanks _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
