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: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
