[Olsr-users] OLSR Gateway & HNA Question

Bhat, Ishwara (spam-protected)
Sat Jan 17 09:38:58 CET 2009

Thanks a lot Alex & Henning.

I will check how to retransmit packets through the same wlan interface. 


-----Original Message-----
From: Alexander Morlang [mailto:(spam-protected)] 
Sent: Friday, January 16, 2009 8:40 PM
To: Bhat, Ishwara
Cc: (spam-protected)
Subject: Re: [Olsr-users] OLSR Gateway & HNA Question

Hash: SHA1

Bhat, Ishwara schrieb:
> 1. Just to clarify the obvious:
> With Hna4 { }
> The node is going to retransmit any traffic if the destination IP is
> within  ( to ) on the same NIC, right?
> Please confirm.

it just tells all other node about you having that range. nothing more,
the local setup is up to your operating system.

so if you want to retransmitt traffic for that prefix, you need to
configure an interface on you node with that prefix.

if you want to retransmit it on you wireless mesh interface, the
mentioned interface would be an alias interface on you mesh interface.

this config is NOT done by olsrd, it has to be done by some other
entity, probably a script.

> 2. I tried using Dynamic gateway: (dyn_gw version:
> olsrd_dyn_gw.so.0.4) However this plugin seems to have problem.
> When I start olsrd with this plugin, it returns the error -
> "HNA"/"" ... netmask_to_prefix: Got bogus
> netmask Segmentation fault.
> ( My network of static IPs is of 10.1.18. series. I did not make any
> setting outside olsr.conf about this)

reading the documentation would help.

> Please help.
> Thanks Ishwar

> -----Original Message----- From: (spam-protected)
> [mailto:(spam-protected)] On Behalf Of Henning Rogge
>  Sent: Friday, January 16, 2009 6:40 PM To: (spam-protected)
>  Subject: Re: [Olsr-users] OLSR Gateway & HNA Question
> Am Friday 16 January 2009 14:01:56 schrieb Bhat, Ishwara:
>> Hi,
>> I am continuing an old thread. Please answer my question below on
>> HNA configuration.
>> "" usually, you have that case when you run dhcp on your wireless
>> interface while running olsrd on the same wireless interface.
>> so you have to announce the range of you dhcp-server per HNA to
>> announce the route back. if your dhcp range is outside of the
>> iprange used in the mesh network, you might need an alias ip and
>> and a resulting netroute to that interface.""
> You can announce any kind of address in an HNA. Of course the IP of
> the router itself must be a "olsr net ip".
>> You are saying that we can provide a range of addresses within the
>> same network number in HNA entry? How do we do that ?
>> I checked the olsr.conf we have provision to give only a network
>> address, not any range of addresses.
> You can use a HNA like this:
> Hna4 { }
> This will announce the addresses to
>> I also checked hna_set.c and the header. The structures there do
>> not seem to indicate that possibility.
> Henning
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