Total Internet BGP routes taken today

BGP table version is 4727126, main routing table version 4727126
284303 network entries using 28714603 bytes of memory
9076734 path entries using 435683232 bytes of memory
1527630 BGP path attribute entries using 85555176 bytes of memory
1292500 BGP AS-PATH entries using 34542132 bytes of memory
23279 BGP community entries using 1673428 bytes of memory
17 BGP extended community entries using 508 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 586169079 total bytes of memory
Dampening enabled. 2503 history paths, 4800 dampened paths
BGP activity 352580/58661 prefixes, 23832214/14721204 paths, scan interval 60 se
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Comments

GT-Rob

Sounds about right. We have a few internet facing routers that download the entire table. Then they wonder why its low on memory...

redwarrior

Dang...no wonder I've always been taught to limit the number of AS's routes you accept.

mikearama

And that's one table! BGP has... what? 4? 5 tables? That's a crap load of mem.

kpjungle

How does an enterprise/ISP/whoever needs an AS and a BGP table actually go about getting the BGP table? Do you make a peering contract with another ISP. I know technically what you do, but Its more the contractual agreements im curious about.

Are there any constraints/rules you must abide by?

kryolla

Just an update on how much the internet has grown in just 10 months

BGP table version is 14644156, main routing table version 14644156
311048 network entries using 41058336 bytes of memory
9577261 path entries using 498017572 bytes of memory
1566261/56823 BGP path/bestpath attribute entries using 231806628 bytes of memory
1357511 BGP AS-PATH entries using 36949132 bytes of memory
19950 BGP community entries using 1338296 bytes of memory
29 BGP extended community entries using 1180 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 809171144 total bytes of memory
Dampening enabled. 5523 history paths, 16725 dampened paths
BGP activity 531584/214655 prefixes, 53175514/43579678 paths, scan interval 60 secs

networker050184

kryolla wrote: »

Just an update on how much the internet has grown in just 10 months

BGP table version is 14644156, main routing table version 14644156
311048 network entries using 41058336 bytes of memory
9577261 path entries using 498017572 bytes of memory
1566261/56823 BGP path/bestpath attribute entries using 231806628 bytes of memory
1357511 BGP AS-PATH entries using 36949132 bytes of memory
19950 BGP community entries using 1338296 bytes of memory
29 BGP extended community entries using 1180 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 809171144 total bytes of memory
Dampening enabled. 5523 history paths, 16725 dampened paths
BGP activity 531584/214655 prefixes, 53175514/43579678 paths, scan interval 60 secs

Its actually a little less than that on the internet. If you are checking from a border router you may not get accurate stats as it will also have any internal routes that may be summarized on the internet. Ours our showing a little higher than what you currently have with a bunch of full feeds.

BGP table version is 255460563, main routing table version 255460563
363769 network entries using 41469666 bytes of memory
1829654 path entries using 87823392 bytes of memory
181508/50468 BGP path/bestpath attribute entries using 18150800 bytes of memory
2302 BGP rrinfo entries using 84288 bytes of memory
78816 BGP AS-PATH entries using 2042740 bytes of memory
3303 BGP community entries using 441370 bytes of memory
2048 BGP extended community entries using 60178 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
20834 BGP filter-list cache entries using 250008 bytes of memory
BGP using 150322442 total bytes of memory
291131 received paths for inbound soft reconfiguration
BGP activity 4667317/4277549 prefixes, 53738438/51854146 paths, scan interval 60 secs

You can get daily updates from APNIC or sign up for the NANOG mailing list and get weekly BGP table/CIDR updates. They are currently showing 294311 from APNIC and 301116 from route views (which includes some iBGP prefixes).

Forsaken_GA

BGP table version is 175504806, main routing table version 175504806
289367 network entries using 34145306 bytes of memory
1850751 path entries using 96239052 bytes of memory
288289/51256 BGP path/bestpath attribute entries using 40360460 bytes of memory
127652 BGP AS-PATH entries using 3423014 bytes of memory
7633 BGP community entries using 407148 bytes of memory
36 BGP extended community entries using 2982 bytes of memory

That's what my core router is showing right now, but we do some pretty aggressive filtering

Forsaken_GA

kpjungle wrote: »

How does an enterprise/ISP/whoever needs an AS and a BGP table actually go about getting the BGP table? Do you make a peering contract with another ISP. I know technically what you do, but Its more the contractual agreements im curious about.

Are there any constraints/rules you must abide by?

To answer this question - When you turn up a circuit with your transit provider, you'll generally get a choice as to how you want your routing. If you're single homed, you pretty much take a default route, no need to stress your routers doing BGP. If you're multihomed, you pretty much have to do BGP, and you exhange routes with your uplink provider, and tuned and filter to your whim, and others will do the same with your routes. Generally, anything longer than a /24 is going to get filtered out.

A large part of why the table is growing is because people are deaggregating larger ip spaces, since ARIN is getting stingy with new allocations

kryolla

networker050184 wrote: »

Its actually a little less than that on the internet. If you are checking from a border router you may not get accurate stats as it will also have any internal routes that may be summarized on the internet. Ours our showing a little higher than what you currently have with a bunch of full feeds.

You can get daily updates from APNIC or sign up for the NANOG mailing list and get weekly BGP table/CIDR updates. They are currently showing 294311 from APNIC and 301116 from route views (which includes some iBGP prefixes).

I got my info from a public BGP mirror or route-view so if there is an issue on the accuracy then you can take it up with them. Here is the link for the public BGP mirror

Route Views Project Page