Scott, Yep, we had to send in the line cards to get them upgraded, didn't have any information on upgrading the s/w on the Line cards and TAC wanted me to RMA them back. So. Boy this one was a real pain because it only seemed protocol specific at the time. Here's the referenced Bug for those interested. CSCeb67650 Bug Details Headline WS-X6548-GE-TX & WS-X6148-GE-TX may drop frames on egress Product cat6000 Model x6548 Component hw-1000tx Duplicate of Severity 2 Severity help Status Resolved Status help First Found-in Version 8.1 All affected versions First Fixed-in Version 8.1(1.8), 8.1(1.9), 8.2(0.18)DEL, 7.6(2.3), 12.1(19.4)E, 12.2(17a)SX Version help Release Notes Packets destined out the WS-X6548-GE-TX or the WS-X6148-GE-TX that are less than 64 bytes will be dropped. This can occur when a device forwards a packet that is 60 bytes and the 4 byte dot1q tag is to added to create a valid 64 byte packet. When the tag is removed the packet is 60 bytes. If the destination is out a port on the WS-X6548-GE-TX or the WS-X6148-GE-TX it will be dropped by the linecard. Additionally, if packets are received on an interface that does not have a minimum MTU of 64 bytes (e.g. ATM,POS) and are destined out the WS-X6548-GE-TX or the WS-X6148-GE-TX it will be dropped by the linecard. No current workaround other than moving the recieving device to a different model linecard. Cheers! -Joe ---------- From: owner-nanog@merit.edu[SMTP:owner-nanog@merit.edu] on behalf of Scott McGrath[SMTP:mcgrath@fas.harvard.edu] Sent: Monday, March 15, 2004 11:07 AM To: joe Cc: Riley, Marty; nanog@merit.edu Subject: Re: hey had eric sent you Bit hard by same bug. What version of code are you running on the 6513 8.1(2) fixes the bug on the 6x48 line cards. What happens is that packets of 64 bytes or less are silently dropped. Replacing linecards will not help unless there is another bug of which I am not aware. With a little digging I can dredge up the relevant DDTS. Scott C. McGrath On Sat, 13 Mar 2004, joe wrote: