Re: [WISPA] BGP Question
Yes, but the syntax is a little cumbersome. I had it jotted down somewhere...I'll see if I can find it. Or maybe Butch can pipe in with the correct command/syntax? Brad -Original Message- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Gino Villarini Sent: Friday, June 12, 2009 10:09 AM To: WISPA General List Subject: [WISPA] BGP Question IS there any way to verify on a Router the Advertisements received from a peer? in Mikrotik? Gino A. Villarini g...@aeronetpr.com Aeronet Wireless Broadband Corp. tel 787.273.4143 fax 787.273.4145 WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
RE: [WISPA] BGP Question
Hi Matt, I ran this past my support team. They don't agree with this: AS prepending is fairly effective method. Assuming you have more then just a /24 network, you also can use selective advertising of more specific prefixes through a preferred provider to influence inbound traffic. In this case having quality upstreams is not the issue at all. This person wants all their VOIP traffic to be symmetrically routed, at least from their network control. (Between the end points packets going over the Internet may be asymmetrically routed and forcing symmetric routing could still be a moot point.) Regardless of the upstreams used they still want one to be the primary and have the other for redundancy. Jeff -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Matt Liotta Sent: Wednesday, February 07, 2007 5:23 PM To: WISPA General List Subject: Re: [WISPA] BGP Question Prepending is not an effective way of forcing other providers to send their traffic through your preferred upstream. In fact, there is no good way to do it at all. It is far better to just have quality upstreams. -Matt Don Annas wrote: When peering with multiple providers, is it a requirement that you pick a primary to send and receive traffic or can you not prepend AS hops and allow traffic to arrive to you via the 'best' BGP route. As a VoIP provider, it is important that traffic enter and leave via the same provider. We currently have a primary provider picked and force traffic in by incrementing the AS prepends on our other BGP peers. There is still some traffic that enters our network via the other peers regardless of the AS prepends and we are looking to either force all traffic in and out one provider as long as that peer is up, or preferably, allow traffic to enter whichever peer is the best route while forcing the return traffic back out the connection that the traffic entered. - Don Annas Triad Telecom, Inc. 336.510.3800 x111 [EMAIL PROTECTED] -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] BGP Question
Jeff Broadwick wrote: AS prepending is fairly effective method. Assuming you have more then just a /24 network, you also can use selective advertising of more specific prefixes through a preferred provider to influence inbound traffic. AS prepending is not as effective as it used to be. I suggest you try it if you disagree and see for yourself. Further, while doing more specifics advertisements is effective from a traffic engineering standpoint it doesn't address the original issue at all. In this case having quality upstreams is not the issue at all. This person wants all their VOIP traffic to be symmetrically routed, at least from their network control. (Between the end points packets going over the Internet may be asymmetrically routed and forcing symmetric routing could still be a moot point.) Regardless of the upstreams used they still want one to be the primary and have the other for redundancy. I completely disagree in regard to quality upstreams. We have seen first hand some of the cheaper providers' practices of forcing asymmetric routing because of their peering ratio requirements. Additionally, the better providers support additional techniques such as BGP communities to influence traffic routing. -Matt -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] BGP Question
Prepending is not an effective way of forcing other providers to send their traffic through your preferred upstream. In fact, there is no good way to do it at all. It is far better to just have quality upstreams. -Matt Don Annas wrote: When peering with multiple providers, is it a requirement that you pick a primary to send and receive traffic or can you not prepend AS hops and allow traffic to arrive to you via the 'best' BGP route. As a VoIP provider, it is important that traffic enter and leave via the same provider. We currently have a primary provider picked and force traffic in by incrementing the AS prepends on our other BGP peers. There is still some traffic that enters our network via the other peers regardless of the AS prepends and we are looking to either force all traffic in and out one provider as long as that peer is up, or preferably, allow traffic to enter whichever peer is the best route while forcing the return traffic back out the connection that the traffic entered. - Don Annas Triad Telecom, Inc. 336.510.3800 x111 [EMAIL PROTECTED] -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] BGP Question
On Wed, 7 Feb 2007, Don Annas wrote: When peering with multiple providers, is it a requirement that you pick a primary to send and receive traffic or can you not prepend AS hops and allow traffic to arrive to you via the 'best' BGP route. There is no way to insure that traffic will come back to you on any particular interface/connection. Prepending is the best method to add to the probability that the other route will be used. It should be noted that it is possible that a BGP Peer will remove your prepended hops, however. -- Butch Evans Network Engineering and Security Consulting 573-276-2879 http://www.butchevans.com/ My calendar: http://tinyurl.com/y24ad6 Training Partners: http://tinyurl.com/smfkf Mikrotik Certified Consultant http://www.mikrotik.com/consultants.html -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
