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The problem in case others face in future was using 'iBGP' in
routeros, if the 2 routers are the same AS it assumes each router is
aware of the next-hop IP. In this case the edge router was expected
to have a route to the Megaport IP Peering range that is actually
known on the peering router, by telling the peering router to force
itself as the next-hop choice on the BGP session to his edge router,
it allowed the edge router to route the traffic correctly. This is
still a 'hack-around' to an extent, and this is where a good IGP
comes in handy to distribute the connected routes, so you dont have
to 'force-self'. (OSPF usually a winner underneath).<br>
<br>
Given your comments - is there a programmable difference between
eBGP and iBGP on any platform? I always thought they are simply
terms to put into context of use, 2 routers BGP peering with the
same AS is automatically iBGP by context, vs another AS which is
eBGP by context. I know platforms (such as RouterOS) treat them
differently, but there is no 'option' to specify eBGP/iBGP behavior.<br>
<br>
<div class="moz-cite-prefix">On 29/01/15 09:23, Damien Gardner Jnr
wrote:<br>
</div>
<blockquote
cite="mid:CAPrfDLVPPs7tbEoGJBOkqsuteHYTF8EmiK4wFJiMAzOwr1m=RQ@mail.gmail.com"
type="cite">
<div dir="ltr">Ahh, I assumed that was a typo, as I knew he was
running iBGP ;)</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On 29 January 2015 at 09:21, Andrew
Jones <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:aj@jonesy.com.au" target="_blank">aj@jonesy.com.au</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Localpref
is non-transitive between ASes, so I'm not sure that this
would work if Daniel is using eBGP between his peering and
edge routers.<br>
Daniel,<br>
Is there a reason you're running eBGP between your peering
and edge routers, rather than iBGP?
<div>
<div class="h5"><br>
<br>
On 29.01.2015 08:25, Damien Gardner Jnr wrote:<br>
</div>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div class="h5">
Just modify the input filter for the peering session
on your peering<br>
router to increase the localpref of the received
prefixes (BGP Actions<br>
- >Set BGP Local Pref - set it to something higher
than what you're<br>
setting for transit, but lower than what you are
setting for prefixes<br>
received from your customers). As long as you're not
modifying the<br>
localpref of prefixes received from the peering router
on your edge<br>
router, then it'll accept that, and you'll see traffic
go to peering<br>
rather than transit. <br>
<br>
On 29 January 2015 at 08:21, Daniel <<a
moz-do-not-send="true"
href="mailto:daniel@dwatson.me" target="_blank">daniel@dwatson.me</a>>
wrote:<br>
<br>
</div>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div class="h5">
Hi Guys<br>
<br>
As some people on-list may be aware ive switched
from Vyatta/VyOS to<br>
Mikrotik as its much easier for me to manage then
all the issues i<br>
previously had with Vyatta/VyOS,<br>
<br>
Since switching across to Mikrotik ive not had any
issues what so ever<br>
except until now,<br>
<br>
We have MegaPort terminated to our peering router,
in which I have a ebgp<br>
session configured between the peering router and
our edge router,<br>
<br>
However when i traceroute 8.8.8.8 it still seems to
be going over transit<br>
than peering,<br>
<br>
I was wondering if somebody on-list whom might have
10 - 15minutes spare<br>
could give me a hand to resolve this issue?<br>
<br>
Please let me know and ill be more then happy to
provide further<br>
information on request.<br>
<br>
TIA<br>
<br>
Daniel<br>
<br>
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<br>
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We danced among the lightning bolts,<br>
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-- <br>
<div class="gmail_signature">
<div dir="ltr">
<p>Damien Gardner Jnr<br>
VK2TDG. Dip EE. GradIEAust<br>
<a moz-do-not-send="true"
href="mailto:rendrag@rendrag.net" target="_blank">rendrag@rendrag.net</a>
- <span><a moz-do-not-send="true"
href="http://www.rendrag.net/" target="_blank">http://www.rendrag.net/</a><u><br>
</u></span>--<br>
We rode on the winds of the rising storm,<br>
We ran to the sounds of thunder.<br>
We danced among the lightning bolts,<br>
and tore the world asunder</p>
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