On Mon, Apr 26, 2010 at 01:04:44AM +0200, Joakim Tjernlund wrote:
BIRD does not use link availability information, therefore if you pull
the cable, BIRD keeps the whole subnet in the router-LSA (if it is
a stub network).
If you do(any plans?), my vote is to leave a host stub in the R-LSA
...@atrey.karlin.mff.cuni.cz] On Behalf Of Joakim Tjernlund
Sent: 26 April 2010 00:05
To: Ondrej Zajicek
Cc: bird-us...@trubka.network.cz
Subject: Re: OSPF performance/SPF calculations
Ondrej Zajicek santi...@crfreenet.org wrote on 2010/04/25 23:20:33:
On Sun, Apr 25, 2010 at 06:08:04PM +0200, Joakim Tjernlund wrote
Andrew Lemin andrew.le...@monitorsoft.com wrote on 2010/04/26 10:46:36:
Hello.
There are users out there who do desperately want multipath routing support
in Bird.
Please don't just ignore the need for multipath.
The SPF work to support that should not be very hard I think, but I have no
: RE: OSPF performance/SPF calculations
Andrew Lemin andrew.le...@monitorsoft.com wrote on 2010/04/26 10:46:36:
Hello.
There are users out there who do desperately want multipath routing support
in Bird.
Please don't just ignore the need for multipath.
The SPF work to support that should
Andrew Lemin andrew.le...@monitorsoft.com wrote on 2010/04/26 12:14:52:
Hello.
Yes, I believe the changes should not be that difficult.
For example, by simply creating two separate 'RIP protocol' instances which
listen on different external interfaces, I can get bird's internal core
routing
it is not there, it is not a problem
however. I am not a developer.
Thanks again. Andy.
-Original Message-
From: Joakim Tjernlund [mailto:joakim.tjernl...@transmode.se]
Sent: 26 April 2010 13:32
To: Andrew Lemin
Cc: bird-us...@trubka.network.cz; Ondrej Zajicek
Subject: RE: OSPF performance/SPF
Slowly getting back to SPF again ..
Ondrej Zajicek santi...@crfreenet.org wrote on 2010/04/23 16:01:16:
On Fri, Apr 23, 2010 at 03:27:10PM +0200, Joakim Tjernlund wrote:
Anyhow I looked at the new code and it is an improvement but I think there
is a flaw: It looks like the ptp code just
On Sun, Apr 25, 2010 at 06:08:04PM +0200, Joakim Tjernlund wrote:
This is not a problem because both SPF and calc_next_hop() chooses the
cheapest (full) ptp link. They both uses the same (local) metrics.
Our ptp links typically have the same cost between the same two routers so
it is not
Ondrej Zajicek santi...@crfreenet.org wrote on 2010/04/25 23:20:33:
On Sun, Apr 25, 2010 at 06:08:04PM +0200, Joakim Tjernlund wrote:
This is not a problem because both SPF and calc_next_hop() chooses the
cheapest (full) ptp link. They both uses the same (local) metrics.
Our ptp links
Ondrej Zajicek santi...@crfreenet.org wrote on 2010/04/21 20:15:07:
On Wed, Apr 21, 2010 at 09:41:47AM +0200, Joakim Tjernlund wrote:
I am using Quagga ATM but I had a quick look at BIRD and I got a few
observations.
Hello. Thank you for your tips and notes.
The LSA/checksum
Joakim Tjernlund/Transmode wrote on 2010/04/21 22:04:06:
Ondrej Zajicek santi...@crfreenet.org wrote on 2010/04/21 20:15:07:
On Wed, Apr 21, 2010 at 09:41:47AM +0200, Joakim Tjernlund wrote:
I am using Quagga ATM but I had a quick look at BIRD and I got a few
observations.
Hello.
On Fri, Apr 23, 2010 at 08:27:40AM +0200, Joakim Tjernlund wrote:
Yes, but not at the moment. The endian problem should be addressed when you
build the lsa.
Does this help at all? In any case, the (int) cast should be there.
Removing of endianity swap is correct only if the Fletcher
Ondrej Zajicek santi...@crfreenet.org wrote on 2010/04/23 11:52:26:
From: Ondrej Zajicek santi...@crfreenet.org
To: Joakim Tjernlund joakim.tjernl...@transmode.se
Cc: bird-us...@trubka.network.cz
Date: 2010/04/23 11:46
Subject: Re: OSPF performance/SPF calculations
On Fri, Apr 23, 2010
On Fri, Apr 23, 2010 at 01:06:20PM +0200, Joakim Tjernlund wrote:
I must be missing something then(not surprising as I just started looking
at BIRD). Why do you need the separate allocation for the body of the LSA
then?
Why not just adding entries to the allocated LSA header?
Ahh, I am
Ondrej Zajicek santi...@crfreenet.org wrote on 2010/04/23 14:22:18:
On Fri, Apr 23, 2010 at 01:06:20PM +0200, Joakim Tjernlund wrote:
I must be missing something then(not surprising as I just started looking
at BIRD). Why do you need the separate allocation for the body of the LSA
Hello!
But it slows down the fletcher checksum as one need to test and extra
calculations because of this. Any gain by the separation is lost many times
over
in the fletcher checksum which could be as simple as(from Quagga with my
tweaks):
Again, do you have any real numbers backing this
Ondrej Zajicek santi...@crfreenet.org wrote on 2010/04/23 16:09:00:
On Fri, Apr 23, 2010 at 10:54:33AM +0200, Joakim Tjernlund wrote:
Removing of endianity swap is correct only if the Fletcher checksum
would return the same value regardless of endianity swap. Is this
a property of the
On Fri, Apr 23, 2010 at 04:12:27PM +0200, Joakim Tjernlund wrote:
As i looked on the Fletcher checksum, it seems that you cannot just swap
the result instead of swapping the checked data.
Then there is a bug else where. Fletcher as such does not
depend on host endian. It operates on bytes
On Fri, Apr 23, 2010 at 04:12:27PM +0200, Joakim Tjernlund wrote:
As i looked on the Fletcher checksum, it seems that you cannot just swap
the result instead of swapping the checked data.
Then there is a bug else where. Fletcher as such does not
depend on host endian. It operates on
On Fri, Apr 23, 2010 at 05:29:09PM +0200, Joakim Tjernlund wrote:
But you also need LSAs in host endianity when doing SPF calculation.
Although it would be probably possible to change SPF calculation to
use directly BE values it would be huge work and it is questionable
whether it wouldn't
On 23.4.2010 14:22, Ondrej Zajicek wrote:
On Fri, Apr 23, 2010 at 01:06:20PM +0200, Joakim Tjernlund wrote:
I must be missing something then(not surprising as I just started looking
at BIRD). Why do you need the separate allocation for the body of the LSA
then?
Why not just adding entries to
Ondrej Zajicek santi...@crfreenet.org wrote on 2010/04/23 18:46:19:
On Fri, Apr 23, 2010 at 05:29:09PM +0200, Joakim Tjernlund wrote:
But you also need LSAs in host endianity when doing SPF calculation.
Although it would be probably possible to change SPF calculation to
use directly BE
I am using Quagga ATM but I had a quick look at BIRD and I got a few
observations.
The LSA/checksum code seem very inefficient. LSAs are built
allocating/reallocing bits
of memory. This is slow and will case memory fragmentation.
The fletcher checksum is very slow as it has extra tests in the
On Wed, Apr 21, 2010 at 09:41:47AM +0200, Joakim Tjernlund wrote:
I am using Quagga ATM but I had a quick look at BIRD and I got a few
observations.
Hello. Thank you for your tips and notes.
The LSA/checksum code seem very inefficient.
LSAs are built allocating/reallocing bits
of memory.
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