raj.panchal at vsnl
Jan 26, 2006, 10:56 PM
Post #5 of 8
Thanks Oliver ...
Last question !!
What would be ideal situation as per RFC for triggering load balancing or
failover across the multiple end points.
This would help me designing my test case.
Thanks and Regards
From: Oliver Boehmer (oboehmer) [mailto:oboehmer [at] cisco]
Sent: Friday, January 27, 2006 12:20 PM
To: Raj Panchal; cisco-bba [at] puck
Cc: cisco-nsp [at] puck
Subject: RE: [cisco-bba] l2tp failover and loadbalancing
Raj Panchal <mailto:raj.panchal [at] vsnl> wrote on Friday, January 27,
2006 7:40 AM:
> Dear Oliver,
> Thanks for the response.
> In your example, you mentioned
> Tunnel-Preference = :1:"10",
> What I understand is that this attribute will allow preference of
> tunnel and its attributes when multiple reply items are being sent as
> items to user as part of his access-requests
> As per RFC the order of preference is higher for lower value of
> Tunnel- Preference, but I can see in your example value is constant
> "10" across all the 3 groups tagged with 1,2,3
> So precisely will your configuration help me load balancing or
> failover for Tunnel-Server-Endpoint
Yes, setting the preference to the same value for multiple tagged groups
does load-sharing among this group, so it does what you want.
I have never tried it, but with a config like
Tunnel-Medium-Type = :1:IP,
Tunnel-Server-Endpoint = :1:"10.1.1.1",
Tunnel-Preference = :1:"10",
Tunnel-Type = :2:L2TP,
Tunnel-Medium-Type = :2:IP,
Tunnel-Server-Endpoint = :2:"10.1.1.2",
Tunnel-Preference = :2:"10",
Tunnel-Type = :3:L2TP,
Tunnel-Medium-Type = :3:IP,
Tunnel-Server-Endpoint = :3:"10.1.1.3",
Tunnel-Preference = :3:"10",
Tunnel-Type = :4:L2TP,
Tunnel-Medium-Type = :4:IP,
Tunnel-Server-Endpoint = :4:"10.1.1.4",
Tunnel-Preference = :4:"20",
Tunnel-Type = :5:L2TP,
Tunnel-Medium-Type = :5:IP,
Tunnel-Server-Endpoint = :5:"10.1.1.5",
Tunnel-Preference = :5:"20",
Tunnel-Type = :6:L2TP,
Tunnel-Medium-Type = :6:IP,
Tunnel-Server-Endpoint = :6:"10.1.1.6",
Tunnel-Preference = :6:"20"
we would load-share across 10.1.1.1, .2 and .3 (all pref=10), and
fail-over and load-share across .4, .5 and .6 (all pref=20) once all the
first three endpoints are unavailable..
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