nanog mailing list archives
Re: useful bgp example
From: Dan White <dwhite () olp net>
Date: Wed, 19 May 2010 13:58:38 -0500
On 19/05/10 13:37 -0500, Jeff Harper wrote:
-----Original Message----- From: Jared Mauch [mailto:jared () puck nether net] Sent: Wednesday, May 19, 2010 1:29 PM To: Jeff Harper Cc: Deric Kwok; nanog () nanog org Subject: Re: useful bgp example Nice, but you don't show it as-path filtering your transits out. I frequently see people take something learned from transit A andsendingit to transit B, and if it happens to be the backup path in-use for your customer, your transits will accept it and likely pick you as best-path and hairpin through your network. - JaredYeah, I left out the actual prefix-list contents, in hindsight I should have added it, so here it is. Also, a typo in the network statement, lol. network 1.1.1.0 mask 255.255.0.0 ip prefix-list NETZ description The networks we advertise via BGP ip prefix-list NETZ seq 10 permit 1.1.1.0/16 ip prefix-list NETZ seq 1000 deny 0.0.0.0/0 le 32
You should be using 192.168.2.0 for documented examples,or at least private space. Configs like this tend to get cut and pasted into routers and get changed only when they don't work. I just had to change a router config a couple of months ago that a consult had set up using 11.0.0.0/24 and 12.0.0.0/24, for point to point links. -- Dan White
Current thread:
- Re: useful bgp example, (continued)
- Re: useful bgp example Jason J. W. Williams (May 17)
- Re: useful bgp example Valdis . Kletnieks (May 17)
- Re: useful bgp example Vincent C Jones (May 18)
- Re: useful bgp example Jared Mauch (May 17)
- Re: useful bgp example Steve Bertrand (May 17)
- Re: useful bgp example Steve Bertrand (May 17)
- Re: useful bgp example Colby Glass (May 18)
- RE: useful bgp example Jeff Harper (May 19)
- Re: useful bgp example Jared Mauch (May 19)
- RE: useful bgp example Jeff Harper (May 19)
- Re: useful bgp example Dan White (May 19)
- Re: useful bgp example Jim Burwell (May 19)
- RE: useful bgp example Vincent C Jones (May 19)
- Re: useful bgp example Jian Gu (May 22)
- RE: useful bgp example Jeff Harper (May 24)
- Re: useful bgp example Jared Mauch (May 19)