Bauke, The DSG is correct. We are simply asking you to use the method that will be better for this particular environment. When you forward traffic from the switch to the router, the mac address is not going to change -- It will always be the router. By using a src/dst IP based hash, you are making sure that traffic will be more evenly dispursed over your etherchannels links.
On Fri, Feb 5, 2010 at 9:37 PM, Bauke Dzavhale <[email protected]> wrote: > Can someone help clarify? > I am confused about the solution presented in the DSG for this task. > For this scenario where we have a switch [Cat4] connected to a router [R9], > DSG uses src-dst-ip based load-balancing. > Since we are configuring load-balancing in the Cat4, I would expect to be > src-ip based load-balancing due to the following: > > Typically we have switch [Cat4] aggregating traffic from many stations. If > an EtherChannel from Cat4 communicates with R9 and since a router is a > single-MAC-address device, source-based forwarding on the Cat4 EtherChannel > ensures that the switch uses all available bandwidth to the router. The > router should be configured for destination-based forwarding because the > large number of workstations ensures that the traffic is evenly distributed > from the router EtherChannel. > And my understanding was that src-dst-ip load-balancing should be applied > when is not clear whether src-ip or dst-ip based forwarding is better suited > for a particular switch. > > > Thanks > > Bauke > ________________________________ > The new Internet Explorer® 8 - Faster, safer, easier. Optimized for Yahoo! > Get it Now for Free! > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > -- Regards, Joe Astorino CCIE #24347 (R&S) Sr. Technical Instructor - IPexpert Mailto: [email protected] Telephone: +1.810.326.1444 Live Assistance, Please visit: www.ipexpert.com/chat eFax: +1.810.454.0130 IPexpert is a premier provider of Classroom and Self-Study Cisco CCNA (R&S, Voice & Security), CCNP, CCVP, CCSP and CCIE (R&S, Voice, Security & Service Provider) Certification Training with locations throughout the United States, Europe and Australia. Be sure to check out our online communities at www.ipexpert.com/communities and our public website at www.ipexpert.com _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
