Re: [c-nsp] BGP Balancing
It's actually both, but i'm mostly concerned with inbound traffic. On 3/20/2010 1:39 PM, Paul Stewart wrote: For inbound traffic our outbound traffic? Or both? MED's are not going to help here... Paul -Original Message- From: cisco-nsp-boun...@puck.nether.net [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Chris Gotstein Sent: March-20-10 1:19 PM To: cisco-nsp@puck.nether.net Subject: [c-nsp] BGP Balancing We are a small ISP that is multi-homed to 2 providers. Each link is 45mbs and we are receiving full bgp routing tables from each provider. I've been trying to load balance the traffic going out over these two connections, but am looking for some advice on other tricks i can try. Unfortunately, only one provider sends MED metrics, so i'm unable to use the bgp med for path selection. I'm currently using 'bgp bestpath as-path multipath-relax' and 'maximum-paths 2'. One link still gets 75% of the traffic, which i believe is do to the fact it has a lower ip address than the other link. Any suggestions on configurations i can try to influence better path load balancing? -- Chris Gotstein Sr Network Engineer UP Logon/Computer Connection UP 500 N Stephenson Ave Iron Mountain, MI 49801 Phone: 906-774-4847 Fax: 906-774-0335 ch...@uplogon.com ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
Re: [c-nsp] BGP Balancing
On 3/21/10 9:53 PM, Chris Gotstein wrote: It's actually both, but i'm mostly concerned with inbound traffic. Inbound is trickier than outbound. Many carriers offer a list of BGP communities which can be used to influence how they treat your advertisements, either by manipulating local preference, prepending, or both. Many are listed here: http://onesc.net/communities/ but ask your upstreams to be sure. Make small changes slowly. Verify with external looking-glass sites to ensure that you're getting the results you want. -- Jay Hennigan - CCIE #7880 - Network Engineering - j...@impulse.net Impulse Internet Service - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
Re: [c-nsp] BGP Balancing
Hi, Agree with Jay, AS path prepending is one good option to influence inbound traffic to load balance. Though you have to be precise with how many AS you are prepending to exactly load balance. But I have seen in web hosting environment that it sometime causes website user with problem of page not loading properly. These things need to be planned,and slowly implemented. Regards, Jawwad Paracha IBM On Mon, Mar 22, 2010 at 10:09 AM, Jay Hennigan j...@west.net wrote: On 3/21/10 9:53 PM, Chris Gotstein wrote: It's actually both, but i'm mostly concerned with inbound traffic. Inbound is trickier than out ound. Many carriers offer a list of BGP communities which can be used to influence how they treat your advertisements, either by manipulating local preference, prepending, or both. Many are listed here: http://onesc.net/communities/ but ask your upstreams to be sure. Make small changes slowly. Verify with external looking-glass sites to ensure that you're getting the results you want. -- Jay Hennigan - CCIE #7880 - Network Engineering - j...@impulse.net Impulse Internet Service - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
Re: [c-nsp] BGP Balancing
Yup, AS prepend and BGP communities. Don't forget that you can selectively adjust those per net blocks you are advertising so net A comes in mostly in provider 1 and net B comes in provider 2 or some other variation. I didn't realize that when I first started doing BGP 15 years ago until someone mentioned it. On Mon, Mar 22, 2010 at 1:29 AM, Muhammad Jawwad Paracha jawwa...@gmail.com wrote: Hi, Agree with Jay, AS path prepending is one good option to influence inbound traffic to load balance. Though you have to be precise with how many AS you are prepending to exactly load balance. But I have seen in web hosting environment that it sometime causes website user with problem of page not loading properly. These things need to be planned,and slowly implemented. Regards, Jawwad Paracha IBM On Mon, Mar 22, 2010 at 10:09 AM, Jay Hennigan j...@west.net wrote: On 3/21/10 9:53 PM, Chris Gotstein wrote: It's actually both, but i'm mostly concerned with inbound traffic. Inbound is trickier than out ound. Many carriers offer a list of BGP communities which can be used to influence how they treat your advertisements, either by manipulating local preference, prepending, or both. Many are listed here: http://onesc.net/communities/ but ask your upstreams to be sure. Make small changes slowly. Verify with external looking-glass sites to ensure that you're getting the results you want. -- Jay Hennigan - CCIE #7880 - Network Engineering - j...@impulse.net Impulse Internet Service - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV ___ cisco-nsp mailing list cisco-...@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ ___ cisco-nsp mailing list cisco-...@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
[c-nsp] BGP Balancing
We are a small ISP that is multi-homed to 2 providers. Each link is 45mbs and we are receiving full bgp routing tables from each provider. I've been trying to load balance the traffic going out over these two connections, but am looking for some advice on other tricks i can try. Unfortunately, only one provider sends MED metrics, so i'm unable to use the bgp med for path selection. I'm currently using 'bgp bestpath as-path multipath-relax' and 'maximum-paths 2'. One link still gets 75% of the traffic, which i believe is do to the fact it has a lower ip address than the other link. Any suggestions on configurations i can try to influence better path load balancing? -- Chris Gotstein, Sr Network Engineer, UP Logon/Computer Connection UP http://uplogon.com | +1 906 774 4847 | ch...@uplogon.com ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
Re: [c-nsp] BGP Balancing
For inbound traffic our outbound traffic? Or both? MED's are not going to help here... Paul -Original Message- From: cisco-nsp-boun...@puck.nether.net [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Chris Gotstein Sent: March-20-10 1:19 PM To: cisco-nsp@puck.nether.net Subject: [c-nsp] BGP Balancing We are a small ISP that is multi-homed to 2 providers. Each link is 45mbs and we are receiving full bgp routing tables from each provider. I've been trying to load balance the traffic going out over these two connections, but am looking for some advice on other tricks i can try. Unfortunately, only one provider sends MED metrics, so i'm unable to use the bgp med for path selection. I'm currently using 'bgp bestpath as-path multipath-relax' and 'maximum-paths 2'. One link still gets 75% of the traffic, which i believe is do to the fact it has a lower ip address than the other link. Any suggestions on configurations i can try to influence better path load balancing? -- Chris Gotstein, Sr Network Engineer, UP Logon/Computer Connection UP http://uplogon.com | +1 906 774 4847 | ch...@uplogon.com ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
