[Olsr-dev] olsrv2 test: handling change in link quality

Vigneswaran R (spam-protected)
Mon Sep 8 06:14:31 CEST 2014

On 09/05/2014 06:04 PM, Henning Rogge wrote:
> On Fri, Sep 5, 2014 at 2:07 PM, Vigneswaran R <(spam-protected)> wrote:
>> Hello,
>> I am planning to test OLSRv2 to see how the change in link quality affects
>> the route calculation.
>> 1. Any suggestion on simulating a degraded link (using tools such as
>> ethtool, iptables, tc etc)?
> The easiest way I found to simulate packet loss on a bridge is a
> mixture of iptables (for dropping stuff with the statistic module) and
> ebtables (for marking traffic depending on incoming/outgoing
> interface).
> I have a couple of scripts for this, maybe you want to have a look at them?

Yes, please.

>> I am using qemu-kvm virtual machines with emulated e1000 NICs for testing. I
>> use iptables to introduce packet loss for testing. However, I am not sure
>> whether any better way to do this.
>> 2. Below is the list of plugins currently being used (default ones) by
>> OLSRv2. Anything else to be enabled?
>> Static plugin: auto_ll4
>> Static plugin: cfg_compact
>> Static plugin: eth_listener
>> Static plugin: ff_dat_metric
>> Static plugin: layer2info
>> Static plugin: mpr
>> Static plugin: neighbor_probing
>> Static plugin: nhdpinfo
>> Static plugin: nl80211_listener
>> Static plugin: olsrv2info
> After getting some new test data from emulation I would suggest
> deactivating the MPR plugin until we get a good hysteresis mechanism
> for it.



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