I'm going to nit-pick on this. Deferred does not mean there was a collision. Don't forget that ethernet (and fast ethernet) are CSMA/CD. What does the CS stand for? Carrier Sense. Quoted from the Internetworking Technologies Handbook... "Before sending data, CSMA/CD stations listen for traffic on the network. A station wanting to send data waits until it detects no traffic before it transmits... A collision occurs when two stations listen for traffic, hear none, and then transmit simultaneously." >From CCO (note to the original poster - this really wasn't hard to find - I looked up 'show interface' in the command reference - the command reference and configuration guides are your friends...) "Deferred indicates that the chip had to defer while ready to transmit a frame because the carrier was asserted" - in other words, the medium was already busy, so the router didn't even try to send the frame then. >From the Open Forum, which requires a CCO login (so no, I don't expect everyone to be able to find this), comes the following tidbit... "A deferral on an Ethernet interface means that a frame was transmitted successfully after waiting for the media to become free. This is generally not a problem. A high defer rate means that the segment is busy." JMcL ---------------------- Forwarded by Jenny Mcleod/NSO/CSDA on 13/06/2001 02:29 pm --------------------------- "Reinhold Fischer" @groupstudy.com on 13/06/2001 03:11:12 am Please respond to "Reinhold Fischer" Sent by: [EMAIL PROTECTED] To: [EMAIL PROTECTED] cc: Subject: Re: Gre tunnel - ip and ipx packet loss -URGENT!!!!!!!! [7:8201] How is the FastEthernet 0/0 connected to the LAN ? Deferred means that the frame was discarded due to too many consecutive collisions on the medium. The router tried to send the frame to the ethernet a few times but it had no success - collisions always occured and the frame got discarded. Can you check how the Router is connected to the LAN ? Is it a shared medium with many stations accessing it ? How many percent of the packets outgoing to the fa0/0 get errors ? It may be well possible that the problem is not the tunnel .... hth Reinhold On Tue, 12 Jun 2001, John Kale wrote: > hi all, > We run a gre tunnel between sites across an isp network...sometimes we lose > connectivity (ipx mainly and somtimes both IP & IPX) but the show tunnel and > show interface commands gives an up, up status. > > The only thing unusual is that the show int f0/0 commands reveals a rising > number of packets deferred. what does the 'xxxxxxxx deferred' signify and > can anybody pls come up with tips on making this tunnel a trouble free one. > > regards, > > > John Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=8302&t=8302 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
