I'm troubleshooting interface drops. However the output of the following show commands don't match number of drops. Based on the output, can you find out what is causing the drops? the G1/0/28 is the uplink. Is that just the port got overrun by the traffic? Any advice what I should do for the troubleshooting? Thanks!
#show int g1/0/28
GigabitEthernet1/0/28 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0019.5667.191c (bia 0019.5667.191c)
Without seeing your QOS policy, I am going to treat this like a physical problem.
To rule out other issues, I would try swapping out to a new network cable. I have been that fix other problems that couldnt be explained. The port might be having a problem, although I dont see anything in what you post that would suggest that. At a minimum, I would suggest moving to another port on the switch or better yet, a port controlled by a different ASIC. Since you are on Gi1/0/28, I would move to the other end of the switch i.e. Gi1/0/10 or somewhere around there. This will help eliminate or identify if the problem is with a particular port and/or ASIC.
Didnt initially catch you were on a port with an SFP. Do you have a spare SFP that you can swap out to see if the SFP might be a problem ? Something else worth trying is the hard code the port speed to 1000/Full. I have had a couple of times where hard coding the port (even on an SFP) made a different. There is no explanation why it should but it has for me. Do you have an open port where you can move the SFP to on that switch ? Also, reseating the SFP might help resolve the problem.
If the ASIC is hung in a weird state, unplugging power to the switch, letting it sit for about 30 seconds to a minute and then plugging power might in might fix it. Not trying to lead you down the wrong path, just trying to help.
I just really don't understand why the two commands show different drop numbers. In the "show interface" output it shows the total number of drops but the sub-categories for the output errors are all 0. Is the number of drops relate to the "show mls qos interface xxx stats" in any way?
As to why the two commands show different drop numbers, dont have an answer for you on that. That is on my list to look at. Will probably take a call to TAC to get some info on that. Havent found anything in the searching I have done.
You can use the option of turning this thread into a TAC case. From what I understand, we all can see the info on what the TAC engineers comes back with. Also tells them that there are others interested in this same info.
That's good to know Ron. However it might not be the case. We have the contract with IBM but not Cisco. We always contact IBM first for our problems. They only engage Cisco if they don't have the answer. Thanks for the advice though.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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