Ok now I get it. This prevents all TCP sessions for slowing. Just the couple TCP sessions I drop packets on will slow.
From: Bryan Bartik [mailto:[email protected]] Sent: Friday, September 04, 2009 2:15 PM To: Bodnar, Edward Cc: [email protected] Subject: Re: [OSL | CCIE_RS] RED Edward, RED stops the global synchronization problem. That is when all sessions scale back and then speed up at once. RED will cause a few sessions to scale back, allowing most other flows to continue at the same speed. Like all QoS mechanisms, it's not going to resolve all bandwidth issues, but should be able to alleviate some problems where large flows aree causing congestion. WRED (weighted RED) uses the DSCP bits to differentiate further. -hth On Fri, Sep 4, 2009 at 12:03 PM, Bodnar, Edward <[email protected]<mailto:[email protected]>> wrote: I have a general question. If TCP packets are dropped causing a slow down on a network ( Tail drop ) If I enable RED and it starts randomly dropping packets before the congestion happens how does this help me. I keep reading answers that say it drops the packet before the congestion starts but it's still dropping packets how does this help? Ed, _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com<http://www.ipexpert.com> -- Bryan Bartik CCIE #23707 (R&S), CCNP Sr. Support Engineer - IPexpert, Inc. URL: http://www.IPexpert.com
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
