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87 messages in net.nether.puck.cisco-nsp[c-nsp] Growing BGP tables| From | Sent On | Attachments |
|---|---|---|
| Vincent De Keyzer | Nov 19, 2004 6:46 am | |
| Gert Doering | Nov 19, 2004 9:01 am | |
| David J. Hughes | Nov 21, 2004 5:15 pm | |
| Ryan O'Connell | Nov 21, 2004 5:43 pm | |
| Brian Feeny | Nov 21, 2004 9:16 pm | |
| Jon Lewis | Nov 21, 2004 9:49 pm | |
| Gert Doering | Nov 22, 2004 2:55 am | |
| Ian Dickinson | Nov 22, 2004 4:11 am | |
| Neil J. McRae | Nov 22, 2004 4:52 am | |
| Ian Dickinson | Nov 22, 2004 5:47 am | |
| David J. Hughes | Nov 22, 2004 6:45 am | |
| Gert Doering | Nov 22, 2004 7:36 am | |
| Rainer Borromeo | Nov 22, 2004 8:39 am | |
| Jared Mauch | Nov 22, 2004 10:19 am | |
| Gert Doering | Nov 22, 2004 11:07 am | |
| Łukasz Bromirski | Nov 22, 2004 11:15 am | |
| Brian Feeny | Nov 22, 2004 12:04 pm | |
| Gunther Stammwitz | Nov 22, 2004 1:51 pm | |
| Jared Mauch | Nov 22, 2004 2:03 pm | |
| Michael Lyngbøl | Nov 22, 2004 2:15 pm | |
| Gunther Stammwitz | Nov 22, 2004 2:19 pm | |
| David J. Hughes | Nov 22, 2004 2:44 pm | |
| Brian Feeny | Nov 22, 2004 4:48 pm | |
| David J. Hughes | Nov 22, 2004 4:53 pm | |
| Rodney Dunn | Nov 22, 2004 4:58 pm | |
| David J. Hughes | Nov 22, 2004 4:59 pm | |
| David J. Hughes | Nov 22, 2004 5:17 pm | |
| Randy Bush | Nov 22, 2004 5:21 pm | |
| David J. Hughes | Nov 22, 2004 5:31 pm | |
| Randy Bush | Nov 22, 2004 5:34 pm | |
| Brian Feeny | Nov 22, 2004 5:38 pm | |
| Rodney Dunn | Nov 22, 2004 8:17 pm | |
| Rodney Dunn | Nov 22, 2004 8:31 pm | |
| Michael Lyngbøl | Nov 23, 2004 2:44 am | |
| Neil J. McRae | Nov 23, 2004 5:10 am | |
| Neil J. McRae | Nov 23, 2004 5:10 am | |
| Gert Doering | Nov 23, 2004 5:24 am | |
| Michael Lyngbøl | Nov 23, 2004 5:29 am | |
| Neil J. McRae | Nov 23, 2004 5:38 am | |
| Michael Lyngbøl | Nov 23, 2004 5:39 am | |
| Martin Robinson | Nov 23, 2004 5:50 am | |
| Tantsura, Jeff | Nov 23, 2004 5:51 am | |
| Neil J. McRae | Nov 23, 2004 6:42 am | |
| Ben Crocker | Nov 23, 2004 6:54 am | |
| ege iyioglu | Nov 23, 2004 9:28 am | |
| Tantsura, Jeff | Nov 23, 2004 10:17 am | |
| Rodney Dunn | Nov 23, 2004 10:39 am | |
| Tantsura, Jeff | Nov 23, 2004 11:12 am | |
| Rodney Dunn | Nov 23, 2004 11:38 am | |
| Brian Feeny | Nov 23, 2004 12:11 pm | |
| Rodney Dunn | Nov 23, 2004 12:33 pm | |
| Gert Doering | Nov 23, 2004 3:01 pm | |
| David J. Hughes | Nov 23, 2004 4:42 pm | |
| Rodney Dunn | Nov 23, 2004 7:33 pm | |
| Brian Feeny | Nov 23, 2004 7:37 pm | |
| David J. Hughes | Nov 23, 2004 8:30 pm | |
| Mihai CHELARU | Nov 24, 2004 5:07 am | |
| Gert Doering | Nov 24, 2004 7:27 am | |
| Rodney Dunn | Nov 24, 2004 8:27 am | |
| David J. Hughes | Nov 24, 2004 6:28 pm | |
| Krzysztof Adamski | Nov 24, 2004 10:33 pm | |
| Robert Boyle | Nov 25, 2004 12:48 am | |
| Bill Wichers | Nov 25, 2004 12:56 am | |
| Krzysztof Adamski | Nov 25, 2004 9:44 am | |
| Stephen J. Wilcox | Nov 26, 2004 9:21 am | |
| Gert Doering | Nov 26, 2004 10:03 am | |
| Stephen J. Wilcox | Nov 26, 2004 11:09 am | |
| Gert Doering | Nov 26, 2004 11:20 am | |
| Stephen J. Wilcox | Nov 27, 2004 6:53 am | |
| Rodney Dunn | Nov 30, 2004 6:40 pm | |
| David J. Hughes | Nov 30, 2004 7:26 pm | |
| Rodney Dunn | Nov 30, 2004 10:30 pm | |
| Randy Bush | Dec 1, 2004 12:30 am | |
| David J. Hughes | Dec 1, 2004 12:57 am | |
| lee....@census.gov | Dec 1, 2004 8:59 am | |
| Rodney Dunn | Dec 1, 2004 9:18 am | |
| lee....@census.gov | Dec 1, 2004 11:18 am | |
| David J. Hughes | Dec 1, 2004 8:40 pm | |
| Randy Bush | Dec 1, 2004 8:51 pm | |
| Rodney Dunn | Jan 27, 2005 11:41 am | |
| Gert Doering | Jan 27, 2005 11:45 am | |
| Rodney Dunn | Jan 27, 2005 11:48 am | |
| David J. Hughes | Jan 27, 2005 11:42 pm | |
| Joe Maimon | Jan 28, 2005 8:28 am | |
| Jon Lewis | Jan 28, 2005 9:25 am | |
| Joe Maimon | Jan 28, 2005 9:52 am | |
| Jon Lewis | Jan 28, 2005 10:25 am |
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| Subject: | [c-nsp] Growing BGP tables | Actions... |
|---|---|---|
| From: | Krzysztof Adamski (k...@adamski.org) | |
| Date: | Nov 25, 2004 9:44:02 am | |
| List: | net.nether.puck.cisco-nsp | |
On Thu, 25 Nov 2004, Bill Wichers wrote:
Maybe there are some Livingston engineers around who did BGP on the Portmaster3 that can give some ideas on memory usage. From what I remember the PM3 was able to fit two full views (back then about 100k routes each) into 32MB of RAM.
The minimum amount of space needed to store 140k routes is 1.6MB (4 bytes for network, 4 bytes for netmask, 4 bytes for destination). The overhead per route must be huge.
K
You are leaving out all the AS path / nexthop type info that BGP needs to be able to do intelligent things with the route table. There's a lot more in a multihomed router than just this->there type of stuff. I'm not sure it would be possible to calculate a "minimum" memory needed for some given number of routes, since you can't know exactly how much path info will need to be stored with each route. You should be able to get *close* on a large route table though by determining an average bytes/route which is easily done from the info given in 'show bgp sum' on a Cisco box.
I started with the bare minimum (the netmask can be shrunk down to 1 byte, or 5 bits), I know you need lot more info, the AS path, MED, weight, local pref, etc. But this discussion started about memory requirement of a VIP, how much of the extra info is needed on the VIP?
K