[AusNOG] Assistance in picking a router

[Beeson, Ayden]

Definitely lines up much closer to BGP if you look at the network entries rather than prefixes.

UTS-4500#show ip bgp summ
BGP router identifier 137.166.252.249, local AS number 58877
BGP table version is 1085458, main routing table version 1085458
14168 network entries using 2040192 bytes of memory
14169 path entries using 1133520 bytes of memory
3243/3241 BGP path/bestpath attribute entries using 441048 bytes of memory
10186 BGP AS-PATH entries using 374114 bytes of memory
1142 BGP community entries using 75422 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 4064296 total bytes of memory
BGP activity 440046/412613 prefixes, 706997/679562 paths, scan interval 60 secs

PS - Apologies again  to everybody for the giant auto-inserted work footer of which I have no ability to stop, I've got to move my AUSNOG mail to gmail or something, that footer is massive....

Thanks,
Ayden Beeson


-----Original Message-----
From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Beeson, Ayden
Sent: Thursday, 18 July 2013 12:28 PM
To: Tom Lanyon
Cc: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] Assistance in picking a router

Hi Tom,

We are not filtering any prefixes at all; it's a literal full feed.

I haven't found any problems with it cutting off anything yet, it's theoretically possible it is but it's not something we have seen.

I had a quick look, I'm seeing this:

UTS-4500#show cef fib
14573 allocated IPv4 entries, 0 failed allocations
13295 allocated IPv6 entries, 0 failed allocations

Which is interesting, I am seeing 440k BGP prefix's in IPv4 alone, but it hasn't caused us any problems, maybe cef is summarising by network or something....

CEF is not something I know a HUGE amount about tbh, enough to get its function and perform basic troubleshooting, my understanding is if the FIB was full it would software switch the packets and we are definitely not seeing any CPU load on it.

Thanks,
Ayden Beeson


-----Original Message-----
From: Tom Lanyon [mailto:tom+ausnog at oneshoeco.com]
Sent: Thursday, 18 July 2013 12:12 PM
To: Beeson, Ayden
Cc: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] Assistance in picking a router

Hi Ayden,

On 18/07/2013, at 9:22 AM, "Beeson, Ayden" <ABeeson at csu.edu.au> wrote:
> We currently use a 4500-X as our primary net device and it collects a full BGP v4 and v6 route table with no problems at all and its capable of 10gb/s on all its interfaces.

Just curious - you say a full table via BGP on your 4500-X device, but my understanding is that they have a maximum 256K IPv4 and 128K IPv6 FIB entries which should be well exceeded with a full v4 table - are you filtering prefixes from the FIB?

Cheers,
Tom

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Charles Sturt University in Australia  http://www.csu.edu.au  The Grange Chancellery, Panorama Avenue, Bathurst NSW Australia 2795  (ABN: 83 878 708 551; CRICOS Provider Numbers: 00005F (NSW), 01947G (VIC), 02960B (ACT)). TEQSA Provider Number: PV12018

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