topic UnderSize Errors on neighbor switchs of controller in Wireless https://community.cisco.com/t5/wireless/undersize-errors-on-neighbor-switchs-of-controller/m-p/980372#M188905 <P>Hi,</P><P>I have bad quality voice on my wireless Cisco phones.</P><P>I found something:</P><P>If I enter "show int counters errors" on the switchs where are connected my WLAN controllers, there is a lot of "UnderSize errors", and there are more and more.</P><P></P><P>My controllers are connected to this switchs by Fiber and SFP transceivers (GLC-SX-MM). The fibers are 1 meter long. The 4404 controller is connected by link aggregation on 2 Gb ports.</P><P></P><P>Do you know this "undersize errors"? Because during a call, there are lost packets...</P><P></P> Sat, 03 Jul 2021 22:29:08 GMT jerome.gimbert 2021-07-03T22:29:08Z UnderSize Errors on neighbor switchs of controller https://community.cisco.com/t5/wireless/undersize-errors-on-neighbor-switchs-of-controller/m-p/980372#M188905 <P>Hi,</P><P>I have bad quality voice on my wireless Cisco phones.</P><P>I found something:</P><P>If I enter "show int counters errors" on the switchs where are connected my WLAN controllers, there is a lot of "UnderSize errors", and there are more and more.</P><P></P><P>My controllers are connected to this switchs by Fiber and SFP transceivers (GLC-SX-MM). The fibers are 1 meter long. The 4404 controller is connected by link aggregation on 2 Gb ports.</P><P></P><P>Do you know this "undersize errors"? Because during a call, there are lost packets...</P><P></P> Sat, 03 Jul 2021 22:29:08 GMT https://community.cisco.com/t5/wireless/undersize-errors-on-neighbor-switchs-of-controller/m-p/980372#M188905 jerome.gimbert 2021-07-03T22:29:08Z Re: UnderSize Errors on neighbor switchs of controller https://community.cisco.com/t5/wireless/undersize-errors-on-neighbor-switchs-of-controller/m-p/980373#M188906 <HTML><HEAD></HEAD><BODY><P>When a packet size is less than 64 bytes these errors pop up. Mostly these errors are cosmetic having no implications. There are also bugs available regarding this. Issue on the IP phones may be due to bad wireless link. Check for the interference and try changing the channel number to see if this improves the situation. </P></BODY></HTML> Mon, 10 Mar 2008 16:43:45 GMT https://community.cisco.com/t5/wireless/undersize-errors-on-neighbor-switchs-of-controller/m-p/980373#M188906 2008-03-10T16:43:45Z