For some, it's a matter of network design philosophy. One school of
thought says that OSPF should only be used to pass router adjacencies
around, in which case you want to be very explicit about what prefixes
you allow into OSPF. All other prefixes would then be distributed via
iBGP. And in the iBGP case as well, you would then be explicit about
what you allow in. The theory is that OSPF, having only a small number
of prefixes, would converge extremely quickly on the failure of a link.
(In this way, OSPF is behaving kind of like a Layer 3 spanning tree.)
Meanwhile, iBGP is capable of scaling to a very large number of
prefixes, and would normally never have to converge at all, as any
topology changes are invisible to it.
On 05/21/2015 08:59 AM, That One Guy /sarcasm wrote:
i dont understand why the pop routers wouldnt just distribute
connected. In not questioning to be a dick, I just dont understand. I
cant see any reason there would be a route on a pop router under
normal circumstances that i wouldnt want distributed? I have a total
of three days of production OSPF so, though I know this makes me a
secialist, Im wanting to learn
On Thu, May 21, 2015 at 8:59 AM, Stefan Englhardt <s...@genias.net
<mailto:s...@genias.net>> wrote:
Ok. That’s a way ;-)).
*Von:*Af [mailto:af-boun...@afmug.com
<mailto:af-boun...@afmug.com>] *Im Auftrag von *Faisal Imtiaz
*Gesendet:* Donnerstag, 21. Mai 2015 15:52
*An:* af@afmug.com <mailto:af@afmug.com>
*Betreff:* Re: [AFMUG] mt ospf question
>>.Doing this you enable ospf on the interfaces with addresses within
x.x.x.x/x.
This is not wanted on all edge networks/customer networks.
You are absolutely right Stefan, my colleagues failed to mention
(assumed), that you should put all your physical interfaces in the
OSPF interface and set them up as passive :)
Faisal Imtiaz
Snappy Internet & Telecom
7266 SW 48 Street
Miami, FL 33155
Tel: 305 663 5518 x 232 <tel:305%20663%205518%20x%20232>
Help-desk: (305)663-5518 <tel:%28305%29663-5518> Option 2 or
Email: supp...@snappytelecom.net <mailto:supp...@snappytelecom.net>
------------------------------------------------------------------------
*From: *"Stefan Englhardt" <s...@genias.net
<mailto:s...@genias.net>>
*To: *af@afmug.com <mailto:af@afmug.com>
*Sent: *Thursday, May 21, 2015 9:45:04 AM
*Subject: *Re: [AFMUG] mt ospf question
Doing this you enable ospf on the interfaces with addresses
within x.x.x.x/x.
This is not wanted on all edge networks/customer networks.
*Von:*Af [mailto:af-boun...@afmug.com] *Im Auftrag von *Shayne
Lebrun
*Gesendet:* Donnerstag, 21. Mai 2015 15:33
*An:* af@afmug.com <mailto:af@afmug.com>
*Betreff:* Re: [AFMUG] mt ospf question
You tell the router what routes to redistribute, rather than
telling the router to redistribute everything that’s there.
There’s never a reason not to simply take the extra five
seconds to type ‘/routing ospf network add network=x.x.x.x/x
area=whatever’.
There’s a lot of very good reasons not to, however.
*From:*Af [mailto:af-boun...@afmug.com] *On Behalf Of *Stefan
Englhardt
*Sent:* Thursday, May 21, 2015 8:16 AM
*To:* af@afmug.com <mailto:af@afmug.com>
*Subject:* Re: [AFMUG] mt ospf question
Looked twice at this. How does your network know the route to
a network connected to one of your routers if he does not
redistribute this information into ospf?
*Von:*Af [mailto:af-boun...@afmug.com] *Im Auftrag von *Dennis
Burgess
*Gesendet:* Donnerstag, 21. Mai 2015 14:10
*An:* af@afmug.com <mailto:af@afmug.com>
*Betreff:* Re: [AFMUG] mt ospf question
There are about 0 times when you should distribute connected,
just a FYI. 99% of the time it causes issues with unintended
and/or unneeded distribution of routes ..
Dennis Burgess, CTO, Link Technologies, Inc.
den...@linktechs.net <mailto:den...@linktechs.net> –
314-735-0270 <tel:314-735-0270> – www.linktechs.net
<http://www.linktechs.net>
*From:*Af [mailto:af-boun...@afmug.com] *On Behalf Of *Gilbert
Gutierrez
*Sent:* Wednesday, May 20, 2015 3:47 PM
*To:* af@afmug.com <mailto:af@afmug.com>
*Subject:* Re: [AFMUG] mt ospf question
Are you redistributing Connected? If the /30 is not on the
networks tab, then you will need to redistribute connected
routes. If you add static routes pointing to places you will
want to redistribute static routes as well.
Gilbert
On 5/20/2015 1:03 PM, That One Guy /sarcasm wrote:
So I have this here mikrotik Ive been implementing ospf on
Right now because this is transition, all MT ports hit the
same switch
Eth6 is on a /30 that is going to a powercode BMU thats
distributing the default route, it works fine
Eth2 is on a /30 that is going to a fortigate, it works fine
the routes propagate as they should
I initially tried to add another /30 to Eth2 for a second
fortigate, but it wouldnt let me add the netwok
so I put that /30 on eth3 it comes up in a state
designated router
I moved it to eth4, same thing designated router the other
two that are working have said backup all along
is there something about adding a third ospf interface to
mikrotik i need to know here?
--
If you only see yourself as part of the team but
you don't see your team as part of yourself you
have already failed as part of the team.
--
If you only see yourself as part of the team but you don't see your
team as part of yourself you have already failed as part of the team.
!DSPAM:2,555e00ec106121683516602!
