[Mikrotik] BGP max-prefix-limit

Terri Kelley neteng at farm-market.net
Thu Nov 17 09:56:58 CST 2016


I know. I never set it.

-- 
Terri Kelley
Network Engineer
254-697-6710
Farm to Market Broadband

On November 17, 2016 at 9:51:02 AM, Josh Luthman (josh at imaginenetworksllc.com) wrote:

I'm talking about the max-prefix-limit value:

/routing bgp peer
add address-families=ip as-override=no default-originate=never disabled=no \
    hold-time=3m in-filter=TW-IN instance=default max-prefix-limit=650000 \
<snip>


Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373

On Thu, Nov 17, 2016 at 10:41 AM, Terri Kelley <neteng at farm-market.net> wrote:
Comes straight from them to me, two LC modules in it. Gig ether on the LAN side.

-- 
Terri Kelley
Network Engineer
254-697-6710
Farm to Market Broadband

On November 17, 2016 at 9:31:46 AM, Josh Luthman (josh at imaginenetworksllc.com) wrote:

So you use 4.3m?

Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373


On Nov 17, 2016 10:29 AM, "Terri Kelley" <neteng at farm-market.net> wrote:
I really haven’t worried about it. I’m using a CCR1036-12G-4S with two peers and getting the full table from both, no restrictions etc. Its not having any trouble at all, not even close to maxing anything. All its doing is BGP. Did some load balance with it before we upgraded our fiber links but that didn’t bother it all either.

-- 
Terri Kelley
Network Engineer
254-697-6710
Farm to Market Broadband

On November 17, 2016 at 9:21:01 AM, Josh Luthman (josh at imaginenetworksllc.com) wrote:

I have two peers and they are both set to 650,000. They currently have
about 610,000 prefixes.

What is everyone else using and should I be worried about the next couple
weeks/months/years may hit this limit? With the lack of IPv4 space how
much higher can this number actually get?

The wiki reads that the maximum is a 32 bit value. I don't think setting
it to 4.3m would make any sense.

Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
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