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NPE-300 and BGP table size

  

 
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garlic at garlic

Nov 11, 2005, 12:13 PM

Post #1 of 10 (417 views)
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NPE-300 and BGP table size
Will two full feeds fit in an NPE-300 with 256MB on a 7206VXR these days?

Roy
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jared at puck

Nov 11, 2005, 12:20 PM

Post #2 of 10 (410 views)
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Re: NPE-300 and BGP table size [In reply to]
On Fri, Nov 11, 2005 at 12:13:04PM -0800, Roy wrote:
> Will two full feeds fit in an NPE-300 with 256MB on a 7206VXR these days?


You may be able to fit them, but without much headroom.

If you're talking about two larger providers giving you
routes, you may be best-off just taking what they call "customer"
routes from each then send the rest of the traffic to one or the
other.

this is what i did with folks with npe-150's and others
in the past.

- jared

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alex at nac

Nov 11, 2005, 12:20 PM

Post #3 of 10 (411 views)
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Re: NPE-300 and BGP table size [In reply to]
yes. However, it will be unhappy during high traffic loads + BGP Scanner.




On Fri, 11 Nov 2005, Roy wrote:

> Will two full feeds fit in an NPE-300 with 256MB on a 7206VXR these days?
>
> Roy
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>

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Net Access Corporation, 800-NET-ME-36, http://www.nac.net

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ekagan at axsne

Nov 11, 2005, 12:22 PM

Post #4 of 10 (410 views)
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RE: NPE-300 and BGP table size [In reply to]
> Will two full feeds fit in an NPE-300 with 256MB on a 7206VXR
> these days?
>
Depends on the Image/Features. With some older images you can sqeak by and
still have some free mem. Newer Images, S trains, etc probably not or
really, really tight. (You could always filter out the /24 and cut the
table in half and then you should be okay)

Eric


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saku+cisco-nsp at ytti

Nov 11, 2005, 12:26 PM

Post #5 of 10 (408 views)
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Re: NPE-300 and BGP table size [In reply to]
On (2005-11-11 12:13 -0800), Roy wrote:
> Will two full feeds fit in an NPE-300 with 256MB on a 7206VXR these days?

Not with 12.2(25)S5 and up, at least if you have even some few 10k's of
iBGP routes.


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Wolfgang.Roth at brave

Nov 11, 2005, 12:47 PM

Post #6 of 10 (421 views)
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Re: NPE-300 and BGP table size [In reply to]
Dear Roy,

> Will two full feeds fit in an NPE-300 with 256MB on a 7206VXR these days?

yes, running e.g. 12.3(X). Also consider using 'memory-size iomem 40'. Then
you will have about 30 - 40 MB free memory, which should be enough.


Wolfgang


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garlic at garlic

Nov 11, 2005, 8:55 PM

Post #7 of 10 (411 views)
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Re: NPE-300 and BGP table size [In reply to]
To all.. Thanks for the comments. I think I talked the customer out of
full feed for now.

Roy
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mark at noc

Nov 12, 2005, 8:21 AM

Post #8 of 10 (413 views)
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Re: NPE-300 and BGP table size [In reply to]
A bit late, but I do this:

ip prefix-list twentythree permit 192.0.0.0/5 le 24
ip prefix-list twentythree permit 200.0.0.0/6 le 24
ip prefix-list twentythree permit 204.0.0.0/8 le 24
ip prefix-list twentythree permit 0.0.0.0/0 le 23

and end up with about 120k paths from both neighbors.
With 12.0(27)S4 and "soft-reconfiguration inbound",
I have:
Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
Processor 61AB0EE0 206893344 151803824 55089520 39474804 41915012
I/O 20000000 33554432 531924 33022508 32881952 32951772
I/O-2 E000000 33554432 3246424 30308008 30045616 30307964

-mark
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bambi at Hughes

Nov 13, 2005, 7:38 PM

Post #9 of 10 (405 views)
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Re: NPE-300 and BGP table size [In reply to]
On 13/11/2005, at 2:21 AM, Mark Kent wrote:

> A bit late, but I do this:
>
> ip prefix-list twentythree permit 192.0.0.0/5 le 24
> ip prefix-list twentythree permit 200.0.0.0/6 le 24
> ip prefix-list twentythree permit 204.0.0.0/8 le 24
> ip prefix-list twentythree permit 0.0.0.0/0 le 23
>
> and end up with about 120k paths from both neighbors.

And I hope someone is sending you a default (or you have a static one
configured). If not you will not be able to contact any of the
legitimately allocated /24's. Seeing as the default allocation policy
in the min 90's of many small RIRs (like aunic) was /24 there's a lot
of them out there.


David
...

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kristo at ipf

Nov 15, 2005, 2:29 AM

Post #10 of 10 (404 views)
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Re: NPE-300 and BGP table size [In reply to]
> And I hope someone is sending you a default (or you have a static one
> configured). If not you will not be able to contact any of the
> legitimately allocated /24's. Seeing as the default allocation policy
> in the min 90's of many small RIRs (like aunic) was /24 there's a lot

Also, they are still assigning /24 provider independent netblocks to
eg. ccTLD's and small IX's.

--
Kristófer Sigurðsson Tel: +354 414 1600
Netrekstur/Network Operations IP Fjarskipti ehf.

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