Would double tagging (qnq) sitting atop g3/3 (service instances or svi's) cause this? Or mpls-enabled svi's sitting on top of g3/3 perhaps ? (brainstorming as I'm not sure what to make of it)
Aaron -----Original Message----- From: cisco-nsp-boun...@puck.nether.net [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of John Neiberger Sent: Wednesday, September 19, 2012 12:20 PM To: cisco-nsp@puck.nether.net Subject: [c-nsp] Giants and input errors but no MTU mismatch 7600-to-4948 I have an interface on a 4948 that is reporting increasing giants and input errors. The MTU is the default 1500 and so is the interface on the other side of the link. This is a dot1q trunk, if that is relevant. 7600 Side: GigabitEthernet3/3 is up, line protocol is up (connected) Hardware is C6k 1000Mb 802.3, address is 7081.058f.471e (bia 7081.058f.471e) MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, reliability 255/255, txload 6/255, rxload 6/255 Input queue: 0/2000/15/0 (size/max/drops/flushes); Total output drops: 52636 Queueing strategy: fifo Output queue: 0/40 (size/max) 30 second input rate 25560000 bits/sec, 3911 packets/sec 30 second output rate 25889000 bits/sec, 2481 packets/sec 103422624782 packets input, 96894603872012 bytes, 0 no buffer Received 421340 broadcasts (390040 multicasts) 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 15 overrun, 0 ignored 0 watchdog, 0 multicast, 0 pause input 0 input packets with dribble condition detected 4948 Side: GigabitEthernet1/46 is up, line protocol is up (connected) Hardware is Gigabit Ethernet Port, address is e05f.b919.522d (bia e05f.b919.522d) MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 6/255, rxload 7/255 Last input 00:00:00, output never, output hang never Last clearing of "show interface" counters never Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 27555000 bits/sec, 2622 packets/sec 5 minute output rate 25030000 bits/sec, 3827 packets/sec 103432206170 packets input, 100545576069607 bytes, 0 no buffer Received 401659764 broadcasts (377463573 multicasts) 0 runts, 1892602 giants, 0 throttles 1892602 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 input packets with dribble condition detected Any idea how I could be getting giants inbound to the 4948 when the interface on the 7600 is set to 1500? I could see it if both sides were not set to dot1q, but they are: Gi3/3 on 802.1q trunking 1 Gi1/46 on 802.1q trunking 1 What in the world is going on here? _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/