[Ospf-manet] Re: Regarding OSPF MDR
Richard Ogier <rich.ogier@earthlink.net> Sat, 10 February 2007 18:24 UTC
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Date: Sat, 10 Feb 2007 10:24:07 -0800
From: Richard Ogier <rich.ogier@earthlink.net>
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To: Philippe Jacquet <philippe.jacquet@inria.fr>
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Subject: [Ospf-manet] Re: Regarding OSPF MDR
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Philippe, I didn't reply to the following comment, because I thought I already addressed it in my previous email. But I will add a few comments. > 4. The GTNet MDR implementation artificially distorts link metrics as > a way of expressing both the actual cost and the property > (synchronized or not) of the link as one. This approach is, not > specified in the MDR draft, so also on this point the GTNet MDR > implementation and the MDR draft exhibit a significant discrepency. I guess the word "artificial" is the opposite of "natural", and the use of such vague words has already been discussed. It is acceptable to allow the link metric to depend on link quality, as you know (since OLSR does this). Link quality can be measured in many ways. For example, if n consecutive Hellos have been received from the neighbor, the link metric can be decreased to represent good link quality. Similarly, if database exchange has been completed with the neighbor, so that its state becomes Full, this implies the link is likely to have better quality, so we can decrease the link metric slightly to prefer it over non-Full neighbors. Since you are bothered that this is not specified in the MDR draft, I can add something like the following to the next draft update: "The router MAY add a small penalty to the metric of links to neighbors that are not Full". Also, we can run simulations both with and without this technique, after the updated version of OSPF-MDR has been implemented in GTNetS. Richard _______________________________________________ Ospf-manet mailing list Ospf-manet@ietf.org https://www1.ietf.org/mailman/listinfo/ospf-manet
- Re: [Ospf-manet] MPR-OSPF GTNetS simulations repo… Emmanuel Baccelli
- [Ospf-manet] MPR-OSPF GTNetS simulations report Emmanuel Baccelli
- Re: [Ospf-manet] MPR-OSPF GTNetS simulations repo… Richard Ogier
- Re: [Ospf-manet] MPR-OSPF GTNetS simulations repo… Richard Ogier
- Re: [Ospf-manet] MPR-OSPF GTNetS simulations repo… Emmanuel Baccelli
- Re: [Ospf-manet] MPR-OSPF GTNetS simulations repo… Richard Ogier
- Re: [Ospf-manet] MPR-OSPF GTNetS simulations repo… Richard Ogier
- Re: [Ospf-manet] MPR-OSPF GTNetS simulations repo… Emmanuel Baccelli
- Re: [Ospf-manet] MPR-OSPF GTNetS simulations repo… Richard Ogier
- Re: [Ospf-manet] MPR-OSPF GTNetS simulations repo… Emmanuel Baccelli
- Re: [Ospf-manet] MPR-OSPF GTNetS simulations repo… Aniket Desai
- Re: [Ospf-manet] MPR-OSPF GTNetS simulations repo… Philippe Jacquet
- Re: [Ospf-manet] MPR-OSPF GTNetS simulations repo… Richard Ogier
- Re: [Ospf-manet] MPR-OSPF GTNetS simulations repo… Richard Ogier
- Re: [Ospf-manet] MPR-OSPF GTNetS simulations repo… Richard Ogier
- [Ospf-manet] Regarding OSPF MDR Philippe Jacquet
- [Ospf-manet] Re: Regarding OSPF MDR Richard Ogier
- [Ospf-manet] Re: Regarding OSPF MDR Richard Ogier
- [Ospf-manet] Re: Regarding OSPF MDR Philippe Jacquet
- [Ospf-manet] Re: Regarding OSPF MDR Richard Ogier
- [Ospf-manet] Regarding MPR-OSPF Richard Ogier