you know these are frames with a frame size between 8 and 63 bytes with a valid CRC and no alignment errors. if this is the case, you may or may not have a problem. depending on the type of equipment, the vendor maybe using nonstandard frames. these frames are interpreted as runts. however, runts may be caused by a malfunctioning interface.
in ATM cells have a 48 byte information field and a 5 byte header. This 53 byte cell falls within the definition of a under size packet and may be counted as a runt. find out what you have "a bad ethernet card or atm" :) Regards, Masood Blog: http://weblog.com.pk/jahil/ > > Any ideas how to troubleshoot this ? > > Thanks. > > Regards, > > Antonio Soares, CCIE #18473 (R&S) > [email protected] > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Antonio Soares > Sent: terça-feira, 24 de Novembro de 2009 11:46 > To: [email protected] > Subject: [c-nsp] Runts in the network > > Hello Group, > > I have 7200's acting as PE's and running 12.4.23 that show an abnormal > numbers of runts. The interfaces where this can be seen are > E1 channel-groups configured for frame-relay. This is the typical > configuration: > > ! > frame-relay switching > ! > controller E1 x/y > channel-group 0 timeslots 1-31 > ! > interface Serialx/y:0 > encapsulation frame-relay > frame-relay traffic-shaping > frame-relay lmi-type ansi > frame-relay ip rtp header-compression > frame-relay intf-type dce > ! > interface Serialx/y:0.100 point-to-point > ip vrf forwarding MY-VRF > ip address x.x.x.x x.x.x.x > ip rip advertise 10 > frame-relay interface-dlci 100 > class MY-CLASS > frame-relay ip rtp header-compression > ! > > The E1 is completely clean but the serial interface shows runts: > > ROUTER#sh int sx/y:0 > Serialx/y:0 is up, line protocol is up > (...) > Received 0 broadcasts, 12 runts, 0 giants, 0 throttles > 12 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort > (...) > ROUTER# > > This happens everywhere in the network and there are many 7200's. The PA > is the PA-MC-8TE1+. > > What could be the source of the problem ? I know what a runt is but i > would like to understand why i have it all over the network. > > > > Thanks. > > Regards, > > Antonio Soares, CCIE #18473 (R&S) > [email protected] > > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
