" out of order could be a major headache, and throughput could suffer greatly." I haven't tried nor experience in similar setup according to my search MLPPP designed to handle the out of order packet (rfc1990) but it can impact the router performance & buffer space. Gobinath
On Tue, Apr 5, 2011 at 3:38 AM, Justin M. Streiner <[email protected]>wrote: > On Mon, 4 Apr 2011, Mark Mason wrote: > > We are planning on terminating dual OC3 point-to-point circuits >> (PA-POS-2OC3) from different carriers on 7201 NPE-G2's at two of our DC's >> and do either HDLC CEF per packet load-balancing or multilink PPP bundle >> together. What are some of the questions and responses from the field for >> anyone who has done this type of setup? >> > > I would stay away from per-packet load-sharing in this design, unless there > is a really compelling reason to use it. The biggest reason to stay away is > that OC3 (technically, OC3c) circuits from different carriers to the same > locations could have vastly different end-to-end latencies. If they are > significantly different, dealing with packets arriving out of order could be > a major headache, and throughput could suffer greatly. > > You might also want to look at a Gigabit Ethernet solution, if that's an > option and you're not chained to a POS design. The operating costs of a > pair of gig-e circuits could very well be substantially lower than a pair of > OC3cs, with the added benefit of being able to provide a lot more bandwidth. > If you were to get two gig-e circuits, the caveat above related to > per-packet load-sharing would still apply. > > In a POS world, if you need more than 155 Mb/s, you either need to install > another POS circuit, or start upgrading to OC12c or higher. That also > throws in the need to purchase new router hardware, because the 7201 won't > handle a POS OC12c, so your costs per megabit wouldn't scale too well. > > jms > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
