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Giant Frames...are they discarded?
pham0329
Member Posts: 556
in CCNA & CCENT
Suppose that a PC is configured with an MTU of 6000, but the switch port is only configured with an MTU of 1500.
What happens when the switch the receives a a frame 6000 byte in size? One of the port is reporting giant frames, but doing a show controllers show it as "Valid oversize frames"
Output of show interface
What happens when the switch the receives a a frame 6000 byte in size? One of the port is reporting giant frames, but doing a show controllers show it as "Valid oversize frames"
Output of show interface
Output of show controllersHardware is Gigabit Ethernet, address is 0023.34f1.6d0a (bia 0023.34f1.6d0a)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:01, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 1147000 bits/sec, 359 packets/sec
5 minute output rate 5853000 bits/sec, 605 packets/sec
492342794 packets input, 429973601105 bytes, 0 no buffer
Received 369606 broadcasts (0 multicasts)
0 runts, 31 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 119437 multicast, 0 pause input
0 input packets with dribble condition detected
680844258 packets output, 575222183639 bytes, 0 underruns
0 output errors, 0 collisions, 5 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
Transmit GigabitEthernet0/10 Receive
3733855693 Bytes 469309553 Bytes
520370255 Unicast frames 491880275 Unicast frames
48124417 Multicast frames 119414 Multicast frames
112142009 Broadcast frames 250161 Broadcast frames
0 Too old frames 420066630 Unicast bytes
0 Deferred frames 29741254 Multicast bytes
0 MTU exceeded frames 19417617 Broadcast bytes
0 1 collision frames 0 Alignment errors
0 2 collision frames 0 FCS errors
0 3 collision frames 0 Oversize frames
0 4 collision frames 0 Undersize frames
0 5 collision frames 0 Collision fragments
0 6 collision frames
0 7 collision frames 6338129 Minimum size frames
0 8 collision frames 174015149 65 to 127 byte frames
0 9 collision frames 19377866 128 to 255 byte frames
0 10 collision frames 15331244 256 to 511 byte frames
0 11 collision frames 11184228 512 to 1023 byte frames
0 12 collision frames 266003234 1024 to 1518 byte frames
0 13 collision frames 0 Overrun frames
0 14 collision frames 0 Pause frames
0 15 collision frames
0 Excessive collisions 0 Symbol error frames
0 Late collisions 0 Invalid frames, too large
0 VLAN discard frames 31 Valid frames, too large
0 Excess defer frames 0 Invalid frames, too small
103177043 64 byte frames 0 Valid frames, too small
163598903 127 byte frames
29704418 255 byte frames 0 Too old frames
11817732 511 byte frames 31 Valid oversize frames
22271457 1023 byte frames 0 System FCS error frames
350067128 1518 byte frames 0 RxPortFifoFull drop frame
0 Too large frames
0 Good (1 coll) frames
0 Good (>1 coll) frames