«

Hi,
we have 20x 2970 gig switches in on of our sites..
one one of them i get lots of buffer misses...
could this be a case of speed and duplex mismatch or faulty memory?
thanks in advance.

Switch Ports Model SW Version SW Image

------ ----- ----- ---------- ----------

* 1 28 WS-C2970G-24TS-E 12.1(19)EA1d C2970-I6L2-M

details below:
-------------------
Switch1#sho buffers
Buffer elements:
481 in free list (500 max allowed)
545774467 hits, 0 misses, 0 created

Public buffer pools:
Small buffers, 104 bytes (total 41, permanent 25, peak 64 @ 7w0d):
40 in free list (20 min, 60 max allowed)
251073940 hits, 12434 misses, 37268 trims, 37284 created
0 failures (0 no memory)
Middle buffers, 600 bytes (total 15, permanent 15, peak 42 @ 7w0d):
13 in free list (10 min, 30 max allowed)
110331 hits, 47 misses, 141 trims, 141 created
0 failures (0 no memory)
Big buffers, 1524 bytes (total 15, permanent 5, peak 30 @ 7w0d):
15 in free list (5 min, 10 max allowed)
43545745 hits, 4321306 misses, 13108707 trims, 13108717 created
0 failures (0 no memory)
VeryBig buffers, 4520 bytes (total 20, permanent 0, peak 44 @ 7w0d):
10 in free list (0 min, 10 max allowed)
15205424 hits, 256435 misses, 512563 trims, 512583 created
0 failures (0 no memory)
Large buffers, 5024 bytes (total 0, permanent 0):
0 in free list (0 min, 5 max allowed)
0 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
Huge buffers, 18024 bytes (total 0, permanent 0):
0 in free list (0 min, 2 max allowed)
0 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)

Interface buffer pools:
Supervisor MIC Fallback pool buffers, 2040 bytes (total 904, permanent
904):
895 in free list (0 min, 904 max allowed)
1234175 hits, 0 misses
supervisor_cpuq_0_pool buffers, 2040 bytes (total 1000, permanent
1000):
500 in free list (0 min, 1000 max allowed)
42086649 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
supervisor_cpuq_1_pool buffers, 2040 bytes (total 128, permanent 12:
2 in free list (0 min, 128 max allowed)
37033688 hits, 351803 fallbacks
supervisor_cpuq_4_pool buffers, 2040 bytes (total 128, permanent 12:
1 in free list (0 min, 128 max allowed)
13487296 hits, 108250 fallbacks
supervisor_cpuq_15_pool buffers, 2040 bytes (total 4, permanent 4):
0 in free list (0 min, 4 max allowed)
299117324 hits, 299117320 misses
supervisor_cpuq_10_pool buffers, 2040 bytes (total 64, permanent 64):
5 in free list (0 min, 64 max allowed)
2483309 hits, 288003 fallbacks
supervisor_cpuq_12_pool buffers, 2040 bytes (total 96, permanent 96):
0 in free list (0 min, 96 max allowed)
96 hits, 0 misses
supervisor_cpuq_6_pool buffers, 2040 bytes (total 128, permanent 12:
0 in free list (0 min, 128 max allowed)
128 hits, 0 misses
supervisor_cpuq_3_pool buffers, 2040 bytes (total 128, permanent 12:
1 in free list (0 min, 128 max allowed)
20663881 hits, 393154 fallbacks
supervisor_cpuq_7_pool buffers, 2040 bytes (total 128, permanent 12:
1 in free list (0 min, 128 max allowed)
16062608 hits, 836113804 misses
supervisor_cpuq_8_pool buffers, 2040 bytes (total 64, permanent 64):
0 in free list (0 min, 64 max allowed)
34785402 hits, 33664369 misses

Switch1#

post:

show version

show interface

show interface error counters

show interface switching

show interface stats

show ip cef

show version :
CHASW19#sho version
Cisco Internetwork Operating System Software
IOS (tm) C2970 Software (C2970-I6L2-M), Version 12.1(19)EA1d, RELEASE
SOFTWARE (fc1)
Copyright (c) 1986-2004 by cisco Systems, Inc.
Compiled Mon 05-Apr-04 20:42 by antonino
Image text-base: 0x00003000, data-base: 0x006A5954

ROM: Bootstrap program is C2970 boot loader
BOOTLDR: C2970 Boot Loader (C2970-HBOOT-M) Version 12.1(14r)EA1a,
RELEASE SOFTWARE (fc1)

CHASW19 uptime is 25 weeks, 6 hours, 4 minutes
System returned to ROM by power-on
System restarted at 10:18:33 uk Wed May 4 2005
System image file is
"flash:c2970-i6l2-mz.121-19.EA1d/c2970-i6l2-mz.121-19.EA1d.bin"

cisco WS-C2970G-24TS-E (PowerPC405) processor (revision E0) with
118776K/12288K bytes of memory.
Processor board ID CSG0827P0BZ
Last reset from power-on
2 Virtual Ethernet/IEEE 802.3 interface(s)
28 Gigabit Ethernet/IEEE 802.3 interface(s)
The password-recovery mechanism is enabled.

512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address : 00:11:92:BE:41:00
Motherboard assembly number : 73-9095-04
Power supply part number : 341-0045-01
Motherboard serial number : CAT032215UZ
Power supply serial number : PXHI0C301TX
Model revision number : E0
Motherboard revision number : A0
Model number : WS-C2970G-24TS-E
System serial number : CSG08WE30BZ
Top Assembly Part Number : 800-24261-01
Top Assembly Revision Number : F0
Hardware Board Revision Number : 0x02


Switch Ports Model SW Version SW Image

------ ----- ----- ---------- ----------

* 1 28 WS-C2970G-24TS-E 12.1(19)EA1d C2970-I6L2-M



Configuration register is 0xF

CHASW19#


show interface

GigabitEthernet0/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4101 (bia
0011.92be.4101)
Description: CSC Linux Box
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
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 0 bits/sec, 0 packets/sec
5 minute output rate 4000 bits/sec, 6 packets/sec
2200071 packets input, 241366236 bytes, 0 no buffer
Received 29 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
105175601 packets output, 207454027 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/2 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4102 (bia
0011.92be.4102)
Description: Elf
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, output hang never
Last clearing of "show interface" counters 2d02h
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 0 bits/sec, 0 packets/sec
5 minute output rate 4000 bits/sec, 6 packets/sec
51873 packets input, 29853467 bytes, 0 no buffer
Received 1289 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
1249002 packets output, 104888218 bytes, 0 underruns
0 output errors, 0 collisions, 0 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
GigabitEthernet0/3 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4103 (bia
0011.92be.4103)
Description: Dwarf
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
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 0 bits/sec, 0 packets/sec
5 minute output rate 19000 bits/sec, 6 packets/sec
148148661 packets input, 3319207868 bytes, 0 no buffer
Received 372798 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
229656167 packets output, 2714817641 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/4 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4104 (bia
0011.92be.4104)
Description: Mckinley
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:01, output hang never
Last clearing of "show interface" counters 1d23h
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 0 bits/sec, 0 packets/sec
5 minute output rate 4000 bits/sec, 6 packets/sec
812353 packets input, 99135022 bytes, 0 no buffer
Received 6423 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
2948 input errors, 2948 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
2130090 packets output, 202219217 bytes, 0 underruns
0 output errors, 0 collisions, 0 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
GigabitEthernet0/5 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4105 (bia
0011.92be.4105)
Description: Crepos
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:01, output hang never
Last clearing of "show interface" counters 1d23h
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 0 bits/sec, 0 packets/sec
5 minute output rate 4000 bits/sec, 6 packets/sec
143560 packets input, 15088064 bytes, 0 no buffer
Received 3901 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
26 input errors, 26 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
1314617 packets output, 161192207 bytes, 0 underruns
0 output errors, 0 collisions, 0 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
GigabitEthernet0/6 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4106 (bia
0011.92be.4106)
Description: Eliot
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
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 0 bits/sec, 0 packets/sec
5 minute output rate 4000 bits/sec, 6 packets/sec
169579159 packets input, 3112612961 bytes, 0 no buffer
Received 104024 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
175504844 packets output, 649979519 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/7 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4107 (bia
0011.92be.4107)
Description: Doyle
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, 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 0 bits/sec, 0 packets/sec
5 minute output rate 4000 bits/sec, 7 packets/sec
503712261 packets input, 1135487612 bytes, 0 no buffer
Received 254567 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
359555689 packets output, 2237908719 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/7 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4107 (bia
0011.92be.4107)
Description: Doyle
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
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 0 bits/sec, 0 packets/sec
5 minute output rate 5000 bits/sec, 7 packets/sec
503712193 packets input, 1135478405 bytes, 0 no buffer
Received 254565 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
359555226 packets output, 2237866794 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/8 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4108 (bia
0011.92be.410
Description: Kipling
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Half-duplex, 100Mb/s
input flow-control is off, output flow-control is off
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 0 bits/sec, 0 packets/sec
5 minute output rate 5000 bits/sec, 7 packets/sec
25441515 packets input, 3646151688 bytes, 0 no buffer
Received 387056 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 72250 multicast, 0 pause input
0 input packets with dribble condition detected
126173281 packets output, 1100264208 bytes, 0 underruns
0 output errors, 27663 collisions, 1 interface resets
0 babbles, 108525 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
GigabitEthernet0/9 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4109 (bia
0011.92be.4109)
Description: Greene
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, 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 0 bits/sec, 0 packets/sec
5 minute output rate 5000 bits/sec, 7 packets/sec
179496160 packets input, 1855295618 bytes, 0 no buffer
Received 313177 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 72226 multicast, 0 pause input
0 input packets with dribble condition detected
181903140 packets output, 1286193937 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/10 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.410a (bia
0011.92be.410a)
Description: Bluey
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, 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 644000 bits/sec, 99 packets/sec
5 minute output rate 422000 bits/sec, 110 packets/sec
840806590 packets input, 4279553547 bytes, 0 no buffer
Received 49377 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 60 multicast, 0 pause input
0 input packets with dribble condition detected
805300967 packets output, 3145949468 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/11 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.410b (bia
0011.92be.410b)
Description: Carroll
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, 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 0 bits/sec, 0 packets/sec
5 minute output rate 4000 bits/sec, 6 packets/sec
598802376 packets input, 1704731479 bytes, 0 no buffer
Received 304934 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 72225 multicast, 0 pause input
0 input packets with dribble condition detected
380492787 packets output, 887002607 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/12 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.410c (bia
0011.92be.410c)
Description: Hesse
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, 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 0 bits/sec, 0 packets/sec
5 minute output rate 4000 bits/sec, 6 packets/sec
411538378 packets input, 3203302393 bytes, 0 no buffer
Received 331062 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 72217 multicast, 0 pause input
0 input packets with dribble condition detected
293894304 packets output, 574951759 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/13 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.410d (bia
0011.92be.410d)
Description: To EPINet
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 RJ45
output flow-control is off, input flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:01, output 00:00:03, 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 89000 bits/sec, 156 packets/sec
5 minute output rate 3802000 bits/sec, 314 packets/sec
608823 packets input, 49302627 bytes, 0 no buffer
Received 2025 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 1985 multicast, 0 pause input
0 input packets with dribble condition detected
93002954 packets output, 629705051 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/14 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.410e (bia
0011.92be.410e)
Description: Future
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 RJ45
output flow-control is off, input flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, 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 0 bits/sec, 0 packets/sec
5 minute output rate 5000 bits/sec, 7 packets/sec
240535430 packets input, 833913558 bytes, 0 no buffer
Received 241980 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
239539791 packets output, 1632489997 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/15 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.410f (bia
0011.92be.410f)
Description: Mercutio
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
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 2000 bits/sec, 3 packets/sec
5 minute output rate 6000 bits/sec, 10 packets/sec
68664593 packets input, 2034362519 bytes, 0 no buffer
Received 75510 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
174975185 packets output, 2595479872 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/16 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4110 (bia
0011.92be.4110)
Description: Elf2
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 RJ45
output flow-control is off, input flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:01, output hang never
Last clearing of "show interface" counters 1d23h
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 211000 bits/sec, 44 packets/sec
5 minute output rate 80000 bits/sec, 48 packets/sec
5638645 packets input, 2039340387 bytes, 0 no buffer
Received 6361 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
6361131 packets output, 941067497 bytes, 0 underruns
0 output errors, 0 collisions, 0 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
GigabitEthernet0/17 is down, line protocol is down (notconnect)
Hardware is Gigabit Ethernet, address is 0011.92be.4111 (bia
0011.92be.4111)
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)
Auto-duplex, Auto-speed
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 1d07h, 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 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
3 packets input, 192 bytes, 0 no buffer
Received 3 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
2006903 packets output, 704783576 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/18 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4112 (bia
0011.92be.4112)
Description: DR Test PC
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
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 0 bits/sec, 0 packets/sec
5 minute output rate 6000 bits/sec, 8 packets/sec
945337 packets input, 184957400 bytes, 0 no buffer
Received 218937 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 111332 multicast, 0 pause input
0 input packets with dribble condition detected
96927601 packets output, 4223463224 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/19 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4113 (bia
0011.92be.4113)
Description: Sting
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, 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 0 bits/sec, 0 packets/sec
5 minute output rate 4000 bits/sec, 6 packets/sec
172542 packets input, 22502087 bytes, 0 no buffer
Received 154741 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
103952124 packets output, 41153998 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/20 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4114 (bia
0011.92be.4114)
Description: RTSRVTEST
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, 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 0 bits/sec, 0 packets/sec
5 minute output rate 4000 bits/sec, 6 packets/sec
6983556 packets input, 1159014583 bytes, 0 no buffer
Received 127046 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
112007708 packets output, 731023156 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/21 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4115 (bia
0011.92be.4115)
Description: PDC-World
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, 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 0 bits/sec, 0 packets/sec
5 minute output rate 4000 bits/sec, 6 packets/sec
5700089 packets input, 863248630 bytes, 0 no buffer
Received 1335059 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 161969 multicast, 0 pause input
0 input packets with dribble condition detected
106570952 packets output, 2010956696 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/22 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4116 (bia
0011.92be.4116)
Description: Tech2
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Half-duplex, 10Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, 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 0 bits/sec, 0 packets/sec
5 minute output rate 4000 bits/sec, 6 packets/sec
8925018 packets input, 869484223 bytes, 0 no buffer
Received 3336005 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
531 input errors, 531 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 1672588 multicast, 0 pause input
0 input packets with dribble condition detected
105263163 packets output, 3003848966 bytes, 0 underruns
0 output errors, 671016 collisions, 1 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
GigabitEthernet0/23 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4117 (bia
0011.92be.4117)
Description: Tech4
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
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 0 bits/sec, 0 packets/sec
5 minute output rate 4000 bits/sec, 6 packets/sec
3329604 packets input, 465128863 bytes, 0 no buffer
Received 96523 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
106630301 packets output, 2129233944 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
GigabitEthernet0/24 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0011.92be.4118 (bia
0011.92be.411
Description: Manning
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
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 0 bits/sec, 0 packets/sec
5 minute output rate 4000 bits/sec, 6 packets/sec
531573116 packets input, 547588490 bytes, 0 no buffer
Received 130908 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
6 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
382891750 packets output, 1200577780 bytes, 0 underruns
0 output errors, 0 collisions, 1 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

show interface error counters
not supported by switch IOS

show interface switching
not supported by switch IOS

show interface stats
not supported by switch IOS

show ip cef
not supported by switch IOS

> one one of them i get lots of buffer misses...
> could this be a case of speed and duplex mismatch
No.

> or faulty memory?
No, however, if the memory
is faulty anything is possible.
So, no


The joys of GBE.

You have no packet drops recorded on the interfaces
so quite a lot is OK.
Zero of
no buffer
ignore
throttle
in drops
out drops
Good. (if you believe the counters - I do, maybe.


A possible cause is a burst of packets arriving
requiring to be processsed by the CPU.

You could if you fancy reduce the number of misses by
increasing the permanent buffers to cover the "high"
figure. Or increase the "min free". I just do the permanent
when I want to worry about this.

Make SURE that you have enough memory.
Many modern platforms have a /lot/.

sh mem

check "lowest", and why not base your decision on "largest".

Leave several meg spare too.

Err on the low side for the buffers.
The buffer misses may be causing further misses
(e.g while it is processing one miss more packets are arriving)
so go gently, increase a bit at a time.

There are some good docs on CCO.

The chances are though that your switch did not
need to see these packets anyway (Windows broadcasts)
and if everything is OK you probably don't need to worry.

I would probably gently raise the buffers 'til it was mostly
eliminated. I would not worry about the last few.

If you wanted to find the culprit put sniffer on network, save all
packets to disk, use snmp to probe buffers (I assume that you can)
and when the buffers misses arise, look at the sniffer.


The likely duplex missmatch on Gi 0/4
is a MUCH more serious problem

GigabitEthernet0/4 is up, line protocol is up (connected)
Full-duplex, 100Mb/s
Last clearing of "show interface" counters 1d23h

812353 packets input, 99135022 bytes, 0 no buffer
Received 6423 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
2948 input errors, 2948 CRC, 0 frame, 0 overrun, 0 ignored

3/800 errors/packets not so desperate but worth fixing.

Consider upgrading to IOS 12.2(25)SEC2