"I had heard that etherchannel (or the IEEE derivative) would support nearly equal load splitting across N interfaces. And it also defines a mechanism so that the receiving router would be able to detect and re-order packets which arrive out of order)."
I've never heard of that. In fact, excerpts from the document link below state "the algorithm is deterministic; given the same addresses and session information, you always hash to the same port in the channel, preventing out-of-order packet delivery." You could always read this doc: http://www.cisco.com/en/US/partner/tech/tk389/tk213/technologies_tech_note09 186a0080094714.shtml Which is "Understanding EtherChannel Load Balancing and Redundancy on Catalyst Switches" Fred Reimer - CCNA Eclipsys Corporation, 200 Ashford Center North, Atlanta, GA 30338 Phone: 404-847-5177 Cell: 770-490-3071 Pager: 888-260-2050 NOTICE; This email contains confidential or proprietary information which may be legally privileged. It is intended only for the named recipient(s). If an addressing or transmission error has misdirected the email, please notify the author by replying to this message. If you are not the named recipient, you are not authorized to use, disclose, distribute, copy, print or rely on this email, and should immediately delete it from your computer. -----Original Message----- From: p b [mailto:[EMAIL PROTECTED] Sent: Monday, July 14, 2003 2:18 PM To: [EMAIL PROTECTED] Subject: was CEF and per packet load sharing [7:72258] Consider two routers which have 3 GEs between them (no L2 device between them). Is it "better" to configure each of these GEs as a standalone L3 connection or to combine them GEs into an etherchannel (802.1ae?) bundle? My $0.02 would be to keep them at L3 and not run another protocol underneath to enable bundling. The question I've heard with this approach is how granular the load splitting works when splitting load across three interfaces. If CEF does per packet load splitting, would the load be (nearly) equal across the three interfaces (eg within 1-2% at all times)? When using per packet CEF, is there an issue with packets being received out of order? (Consider some flow where a large packet is sent over one interface and the following flow packet is small and sent over another interface. The small packet might be received completely before the large packet. Does per packet CEF address this issue?) I had heard that etherchannel (or the IEEE derivative) would support nearly equal load splitting across N interfaces. And it also defines a mechanism so that the receiving router would be able to detect and re-order packets which arrive out of order). Comments? Pointers to relevant docs? THanks Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=72264&t=72258 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
