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4. FAQ

Some of these question/answers are from the OLSRd site.

4.1. If OLSRd fully RFC3626 compliant?
4.2. Can I mix site-local and global IPv6 addresses?
4.3. The GUI front-end failed to compile...why?
4.4. If there is multiply gateways present, how does the mobile node conclude to use the nearest one?
4.5. I get OLSRd up and running - but the nodes don't seem to "hear" each other!

4.1. If OLSRd fully RFC3626 compliant?

Yes. It even has implemented some of the extra functionality mentioned in the RFC. See the RFC Compliance section for complete list.

4.2. Can I mix site-local and global IPv6 addresses?

Yes. But keep in mind that they intentionally were not designed to be used at the same time. The network topology can be quite "messy" if you start using these two.

4.3. The GUI front-end failed to compile...why?

You probably don't have the GTK2.0 development libraries installed.

4.4. If there is multiply gateways present, how does the mobile node conclude to use the nearest one?

When a new gateway is detected, the Mobile Node checks the distance (number of hops) to this newly discovered gateway compared to the current gateway. If there is a shorter distance, this new gateway becomes the current (default) gateway. See section 12.6.2 in the OLSR RFC (RFC3626)

4.5. I get OLSRd up and running - but the nodes don't seem to "hear" each other!

Most of the time this is a configuration error: Check the following:

  • If using WLAN interfaces make sure the ESSID/key match.

  • Make sure the cards are set in "ad-hoc" mode and not "managed".

  • Make sure you are not blocking UDP/698. If using netfilter run ip6tables -L as root to see what rules are set. ip6tables -F flushes all rules.