Re: [WISPA] [WISPA - Offlist] OSPF Tutorial/Guide
That is how all ospf costs default based on ether link speed. In reality it is a giant math problem, you don't want to assign costs based on the defaults if you don't have a wired network. You should actually set costs higher and not use single digits so you have wiggle room. You also want to try and eliminate the static routes or atleast set their metric so high that they are last resort. Redistributed routes are important as well. It is a balancing act. Sent from my Verizon Wireless 4G LTE Smartphone Original message From: Scott Reed sr...@nwwnet.net Date: 07/20/2013 7:59 PM (GMT-07:00) To: WISPA General List wireless@wispa.org Subject: Re: [WISPA] [WISPA - Offlist] OSPF Tutorial/Guide I know that is how Cisco figures default values, but it is not always the best. I may have a 10M wire link and a 54M wireless link. The average data flow is 5M, so want the 10M wire to be the primary because it is more reliable. I would give it a lower cost than the faster wireless link. If you have a wireless link that you know suffers from temperature inversion problems every morning and one that doesn't, but is slower, you may want the slower, more reliable link to have the lower cost so that your reliability stays high, but if that link goes down, you still have a link to use. As with most things in this business, there are general guidelines, but you also have to know your network and make informed decisions, not just follow some rule of thumb. On 7/20/2013 8:06 PM, can...@believewireless.net wrote: Cost should be set based on the speed of the link. So, if you have a 1 Gbps link in your network, set the cost of routers on either side to 1. If you have a 333 Mbps link, set the cost of the routers on either side to 3. 100 Mbps link? Cost = 10. So, your 1 Gbps link speed is really 1000 Mbps so cost = 1000 / Speed. On Sat, Jul 20, 2013 at 5:24 PM, Bob iPhone Kim evdo.hs...@gmail.com wrote: Scott, Can you help remotely? ALL... do we have a services board anywhere... kinda like a craigslist for our group? On Sat, Jul 20, 2013 at 12:55 PM, Scott Reed sr...@nwwnet.net wrote: I have a network with about 800 devices running OSPF. If you need more help, let me know. I do consulting for several WISPs helping get from bridged to routed, setting up routers correctly, etc. If is is easy, no charge. If is going to take some time/effort, I charge $65.00/hour for the actual time involved, no minimum. Let me know what I can do to help. -- Robert Q Kim iPhone Repair Connection San Diego http://www.youtube.com/watch?v=yiSr78Kk8ZU 2611 S Coast Highway San Diego, CA 92007 310 598 1606 ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.3349 / Virus Database: 3204/6506 - Release Date: 07/20/13 -- Scott Reed Owner NewWays Networking, LLC Wireless Networking Network Design, Installation and Administration Mikrotik Advanced Certified www.nwwnet.net (765) 855-1060 (765) 439-4253 (855) 231-6239___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless
Re: [WISPA] [WISPA - Offlist] OSPF Tutorial/Guide
Thanks for the discussion guys, I'll play around with my bench setup this evening and see if I can get it working like I want. On Sun, Jul 21, 2013 at 11:35 AM, Christian Palecek christ...@cybernet1.com wrote: That is how all ospf costs default based on ether link speed. In reality it is a giant math problem, you don't want to assign costs based on the defaults if you don't have a wired network. You should actually set costs higher and not use single digits so you have wiggle room. You also want to try and eliminate the static routes or atleast set their metric so high that they are last resort. Redistributed routes are important as well. It is a balancing act. Sent from my Verizon Wireless 4G LTE Smartphone Original message From: Scott Reed sr...@nwwnet.net Date: 07/20/2013 7:59 PM (GMT-07:00) To: WISPA General List wireless@wispa.org Subject: Re: [WISPA] [WISPA - Offlist] OSPF Tutorial/Guide I know that is how Cisco figures default values, but it is not always the best. I may have a 10M wire link and a 54M wireless link. The average data flow is 5M, so want the 10M wire to be the primary because it is more reliable. I would give it a lower cost than the faster wireless link. If you have a wireless link that you know suffers from temperature inversion problems every morning and one that doesn't, but is slower, you may want the slower, more reliable link to have the lower cost so that your reliability stays high, but if that link goes down, you still have a link to use. As with most things in this business, there are general guidelines, but you also have to know your network and make informed decisions, not just follow some rule of thumb. On 7/20/2013 8:06 PM, can...@believewireless.net wrote: Cost should be set based on the speed of the link. So, if you have a 1 Gbps link in your network, set the cost of routers on either side to 1. If you have a 333 Mbps link, set the cost of the routers on either side to 3. 100 Mbps link? Cost = 10. So, your 1 Gbps link speed is really 1000 Mbps so cost = 1000 / Speed. On Sat, Jul 20, 2013 at 5:24 PM, Bob iPhone Kim evdo.hs...@gmail.comwrote: Scott, Can you help remotely? ALL... do we have a services board anywhere... kinda like a craigslist for our group? On Sat, Jul 20, 2013 at 12:55 PM, Scott Reed sr...@nwwnet.net wrote: I have a network with about 800 devices running OSPF. If you need more help, let me know. I do consulting for several WISPs helping get from bridged to routed, setting up routers correctly, etc. If is is easy, no charge. If is going to take some time/effort, I charge $65.00/hour for the actual time involved, no minimum. Let me know what I can do to help. -- Robert Q Kim iPhone Repair Connection San Diego http://www.youtube.com/watch?v=yiSr78Kk8ZU 2611 S Coast Highway San Diego, CA 92007 310 598 1606 ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless ___ Wireless mailing listWireless@wispa.orghttp://lists.wispa.org/mailman/listinfo/wireless No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.3349 / Virus Database: 3204/6506 - Release Date: 07/20/13 -- Scott Reed Owner NewWays Networking, LLC Wireless Networking Network Design, Installation and Administration Mikrotik Advanced Certified www.nwwnet.net(765) 855-1060(765) 439-4253(855) 231-6239 ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless
Re: [WISPA] [WISPA - Offlist] OSPF Tutorial/Guide
No, it isn't. Mikrotik defaults everything to cost 10, no matter the medium or speed. I am pretty sure I have seen other vendors that set everything to a particular value. Cisco does default based on medium link speed. On 7/21/2013 11:35 AM, Christian Palecek wrote: That is how all ospf costs default based on ether link speed. In reality it is a giant math problem, you don't want to assign costs based on the defaults if you don't have a wired network. You should actually set costs higher and not use single digits so you have wiggle room. You also want to try and eliminate the static routes or atleast set their metric so high that they are last resort. Redistributed routes are important as well. It is a balancing act. Sent from my Verizon Wireless 4G LTE Smartphone Original message From: Scott Reed sr...@nwwnet.net Date: 07/20/2013 7:59 PM (GMT-07:00) To: WISPA General List wireless@wispa.org Subject: Re: [WISPA] [WISPA - Offlist] OSPF Tutorial/Guide I know that is how Cisco figures default values, but it is not always the best. I may have a 10M wire link and a 54M wireless link. The average data flow is 5M, so want the 10M wire to be the primary because it is more reliable. I would give it a lower cost than the faster wireless link. If you have a wireless link that you know suffers from temperature inversion problems every morning and one that doesn't, but is slower, you may want the slower, more reliable link to have the lower cost so that your reliability stays high, but if that link goes down, you still have a link to use. As with most things in this business, there are general guidelines, but you also have to know your network and make informed decisions, not just follow some rule of thumb. On 7/20/2013 8:06 PM, can...@believewireless.net wrote: Cost should be set based on the speed of the link. So, if you have a 1 Gbps link in your network, set the cost of routers on either side to 1. If you have a 333 Mbps link, set the cost of the routers on either side to 3. 100 Mbps link? Cost = 10. So, your 1 Gbps link speed is really 1000 Mbps so cost = 1000 / Speed. On Sat, Jul 20, 2013 at 5:24 PM, Bob iPhone Kim evdo.hs...@gmail.com mailto:evdo.hs...@gmail.com wrote: Scott, Can you help remotely? ALL... do we have a services board anywhere... kinda like a craigslist for our group? On Sat, Jul 20, 2013 at 12:55 PM, Scott Reed sr...@nwwnet.net mailto:sr...@nwwnet.net wrote: I have a network with about 800 devices running OSPF. If you need more help, let me know. I do consulting for several WISPs helping get from bridged to routed, setting up routers correctly, etc. If is is easy, no charge. If is going to take some time/effort, I charge $65.00/hour for the actual time involved, no minimum. Let me know what I can do to help. -- Robert Q Kim iPhone Repair Connection San Diego http://www.youtube.com/watch?v=yiSr78Kk8ZU 2611 S Coast Highway San Diego, CA 92007 310 598 1606 tel:310%20598%201606 ___ Wireless mailing list Wireless@wispa.org mailto:Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless No virus found in this message. Checked by AVG - www.avg.com http://www.avg.com Version: 2013.0.3349 / Virus Database: 3204/6506 - Release Date: 07/20/13 -- Scott Reed Owner NewWays Networking, LLC Wireless Networking Network Design, Installation and Administration Mikrotik Advanced Certified www.nwwnet.net (765) 855-1060 (765) 439-4253 (855) 231-6239 ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless No virus found in this message. Checked by AVG - www.avg.com http://www.avg.com Version: 2013.0.3349 / Virus Database: 3204/6508 - Release Date: 07/21/13 -- Scott Reed Owner NewWays Networking, LLC Wireless Networking Network Design, Installation and Administration Mikrotik Advanced Certified www.nwwnet.net (765) 855-1060 (765) 439-4253 (855) 231-6239 ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless
