[OLSR-users] Re: olsr-users Digest, Vol 18, Issue 16

Sun Aug 21 18:15:32 CEST 2005

Hi! I`m new in mesh networking. I`m trying to set up a mesh network in
the neighborhood. I installed the daemon ver. 4.9 in my windows 98se
box and it seems to be a problem with my wireless interface. The
Switch detects information about the inteface correctly. When I start
the daemon it says:
No interfaces detected! This might be intentional, but it also might
mean that your configuration is fubar.
Can the switch application run on a win98se operating system???
Which are the steps to make it work on a win98se box??
Sorry about my english.
Thanks,
Lucas 

On 8/20/05, (spam-protected) <(spam-protected)> wrote:
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> Today's Topics:
> 
>   1. RE: ICMP Redirects (Weber, Michael J. (US SSA))
>   2. RE: ICMP Redirects (Andreas T?nnesen)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Fri, 19 Aug 2005 15:22:17 -0400
> From: "Weber, Michael J. (US SSA)" <(spam-protected)>
> Subject: RE: [OLSR-users] ICMP Redirects
> To: "OLSR discussion and development" <(spam-protected)>
> Message-ID:
>        <(spam-protected)>
> Content-Type: text/plain;       charset="US-ASCII"
> 
> I just observed the same issue under Linux. A quick review of the code
> indicates that the redirects are not being disabled under Linux, even
> though the code to do so exists... it just isn't ever called (unless I
> missed something!) Under Win32, there is a call made to disable
> redirects. Apparently, linux will issue a redirect if it forwards a
> packet out the same interface on which it was received (which is always
> the case with a transit node in a MANET.)
> 
> I turn off the redirects manually under Linux; they add a lot of extra
> traffic that otherwise hurts the network. In a MANET, you usually can't
> make any assumptions about the reachability of a node from another
> node's perspective, and so the redirect is hardly ever (never?) a good
> idea. I have a simple script that kills the redirects and starts olsrd
> in one shot.
> 
> echo 0 > /proc/sys/net/ipv4/conf/eth1/send_redirects
> 
> Best,
> Mike
> 
> 
> > -----Original Message-----
> > From: (spam-protected)
> > [mailto:(spam-protected)] On Behalf Of Holger Mauermann
> > Sent: Sunday, July 03, 2005 9:37 AM
> > To: (spam-protected)
> > Subject: [OLSR-users] ICMP Redirects
> >
> >
> > Hi,
> >
> > I just noticed that my nodes still send out ICMP redirects,
> > even if it is disabled by olsrd on startup.
> >
> > cat /proc/sys/net/ipv4/conf/eth1/send_redirects shows 0 on
> > all nodes, but tcpdump captures lots of redirects:
> >
> > 15:15:00.068250 IP ...6 > ...1: icmp 177: redirect ...4 to
> > host ...4 15:15:00.107527 IP ...6 > ...4: icmp 129: redirect
> > ...1 to host ...1 15:15:00.934280 IP ...2 > ...7: icmp 89:
> > redirect ...1 to host ...1 15:15:04.742682 IP ...2 > ...4:
> > icmp 113: redirect ...1 to host ...1
> >
> > 4 can't see 1, so 4 has a route to 1 via 6 and 1 has a route
> > to 4 via 6. However, 6 sends back to 1 that it should try 4
> > directly and to 4 that it should try 1 directly... Can this
> > lead to problems? Should I ignore this or is it better to
> > block this ICMP type with the firewall?
> >
> >
> > --
> > \-- Holger Mauermann
> >  \-- (spam-protected)
> >   \-- PGP Key Id: 0x8EA8C301
> > _______________________________________________
> > olsr-users mailing list
> > (spam-protected) https://www.olsr.org/mailman/listinfo/olsr-users
> >
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Fri, 19 Aug 2005 23:09:01 +0200 (CEST)
> From: Andreas T?nnesen <(spam-protected)>
> Subject: RE: [OLSR-users] ICMP Redirects
> To: "OLSR discussion and development" <(spam-protected)>
> Cc: "OLSR discussion and development" <(spam-protected)>
> Message-ID: <(spam-protected)>
> Content-Type: text/plain;charset=iso-8859-1
> 
> 
> ICMP redirects should under Linux be disabled by the call to
> disable_redirects from the interface init function in src/unix/ifnet.c
> I will investigate and fix this when I get back home(I only have access to
> an old win98 box where I am now ;) )
> 
> - Andreas
> 
> > I just observed the same issue under Linux. A quick review of the code
> > indicates that the redirects are not being disabled under Linux, even
> > though the code to do so exists... it just isn't ever called (unless I
> > missed something!) Under Win32, there is a call made to disable
> > redirects. Apparently, linux will issue a redirect if it forwards a
> > packet out the same interface on which it was received (which is always
> > the case with a transit node in a MANET.)
> >
> > I turn off the redirects manually under Linux; they add a lot of extra
> > traffic that otherwise hurts the network. In a MANET, you usually can't
> > make any assumptions about the reachability of a node from another
> > node's perspective, and so the redirect is hardly ever (never?) a good
> > idea. I have a simple script that kills the redirects and starts olsrd
> > in one shot.
> >
> > echo 0 > /proc/sys/net/ipv4/conf/eth1/send_redirects
> >
> > Best,
> > Mike
> >
> >
> >> -----Original Message-----
> >> From: (spam-protected)
> >> [mailto:(spam-protected)] On Behalf Of Holger Mauermann
> >> Sent: Sunday, July 03, 2005 9:37 AM
> >> To: (spam-protected)
> >> Subject: [OLSR-users] ICMP Redirects
> >>
> >>
> >> Hi,
> >>
> >> I just noticed that my nodes still send out ICMP redirects,
> >> even if it is disabled by olsrd on startup.
> >>
> >> cat /proc/sys/net/ipv4/conf/eth1/send_redirects shows 0 on
> >> all nodes, but tcpdump captures lots of redirects:
> >>
> >> 15:15:00.068250 IP ...6 > ...1: icmp 177: redirect ...4 to
> >> host ...4 15:15:00.107527 IP ...6 > ...4: icmp 129: redirect
> >> ...1 to host ...1 15:15:00.934280 IP ...2 > ...7: icmp 89:
> >> redirect ...1 to host ...1 15:15:04.742682 IP ...2 > ...4:
> >> icmp 113: redirect ...1 to host ...1
> >>
> >> 4 can't see 1, so 4 has a route to 1 via 6 and 1 has a route
> >> to 4 via 6. However, 6 sends back to 1 that it should try 4
> >> directly and to 4 that it should try 1 directly... Can this
> >> lead to problems? Should I ignore this or is it better to
> >> block this ICMP type with the firewall?
> >>
> >>
> >> --
> >> \-- Holger Mauermann
> >>  \-- (spam-protected)
> >>   \-- PGP Key Id: 0x8EA8C301
> >> _______________________________________________
> >> olsr-users mailing list
> >> (spam-protected) https://www.olsr.org/mailman/listinfo/olsr-users
> >>
> > _______________________________________________
> > olsr-users mailing list
> > (spam-protected)
> > https://www.olsr.org/mailman/listinfo/olsr-users
> >
> 
> 
> ---------
> Andreas Tønnesen
> http://www.olsr.org
> 
> 
> ------------------------------
> 
> _______________________________________________
> olsr-users mailing list
> (spam-protected)
> https://www.olsr.org/mailman/listinfo/olsr-users
> 
> 
> End of olsr-users Digest, Vol 18, Issue 16
> ******************************************
>