I'm having a bit of confusion about the role of output queues when dealing with input queue drops as explained by Cisco guidelines on the matter:
http://www.cisco.com/univercd/cc/td/doc/cisintwk/itg_v1/tr1915.htm#xtocid4 I understand input drops occurring when the router is receiving incoming packets faster than it can process them. It first suggests increasing the output queue size on the common destination interfaces for traffic arriving on the interface that is having input queue drops. I understand the reasoning behind this part of the solution although the wording confused me at first. However, it then suggests decreasing the size of the input queue to force input queue drops to become output queue drops. What relationship is there between the input and output queues that would cause an input queue decrease to result in output queue drops? Isn't the output queue just used for handing off packets to an outgoing physical interface buffer? I would think that decreasing the input queue size would simply result in more input queue drops. I was thinking it may be referring to output queue drops on an interface other than the one experiencing input queue drops (destination interface of the traffic) but I still can't visualize how an input queue decrease on one interface would result in an increase in packet traffic to an outgoing interface to the point it would cause output drops. It seems to me it would result in an increase of input queue drops on the incoming interface and less traffic on the outgoing interface (due to more packets being dropped on the inbound side). Can someone shed some light on this for me? Or point me in the right direction? Many thanks. -- Jason Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=66955&t=66955 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
