We have a 7613 w/ WS-SUP720-3BXL running 12.2(18)SXF11.
We have a 48 port WS-X6748-GE-TX. On one interface we
continue to see output drops when traffic goes above 200Mb/sec.
The interface is defined as follows (very straightforward):
interface GigabitEthernet9/29
mtu 9000
bandwidth 1000000
no ip redirects
no ip unreachables
ip route-cache flow
ip ospf message-digest-key 1 md5 7 xxxxxx
ip ospf network point-to-point
load-interval 30
hold-queue 4096 out
GigabitEthernet9/29 is up, line protocol is up (connected)
Hardware is C6k 1000Mb 802.3, address is 0015.2c87.b240 (bia 0015.2c87.b240)
MTU 9000 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 70/255, rxload 9/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s
input flow-control is off, output flow-control is off
Clock mode is auto
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:07, output 00:00:03, output hang never
Last clearing of "show interface" counters 15:19:33
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1385749
Queueing strategy: fifo
Output queue: 0/4096 (size/max)
30 second input rate 39197000 bits/sec, 15438 packets/sec
30 second output rate 276768000 bits/sec, 27265 packets/sec
L2 Switched: ucast: 15526 pkt, 90533934 bytes - mcast: 6338 pkt, 944440
bytes
L3 in Switched: ucast: 673843076 pkt, 151541187645 bytes - mcast: 0 pkt,
0 bytes mcast
L3 out Switched: ucast: 1227451580 pkt, 1367583751541 bytes mcast: 0
pkt, 0 bytes
673834038 packets input, 151610506124 bytes, 0 no buffer
Received 54234 broadcasts (0 IP multicasts)
0 runts, 10000 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
1225945267 packets output, 1365797313199 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
---------------------------------------------------------------------------------
Editted "sho platform hardwa capa":
Forwarding engine load:
Module pps peak-pps peak-time
7 186009 1442340 12:41:38 IDT Tue Sep 22 2009
9 232549 450263 22:10:57 IST Wed Nov 24 2010
Switch Fabric Resources
Bus utilization: current: 0%, peak was 6% at 01:04:03 IST Sat May 29 2010
Fabric utilization: Ingress Egress
Module Chanl Speed rate peak rate peak
9 0 20G 2% 9% @18:39 15Dec10 7% 16% @15:14 23Nov10
9 1 20G 0% 6% @08:20 25Aug10 1% 8% @20:51 25Jan10
Interface Resources
Interface drops:
Module Total drops: Tx Rx Highest drop port: Tx Rx
9 18521265 1032837 14 12
----------------------------------------------------------------------------------
Results for "sho mls stat module 9"
Statistics for Earl in Module 9
L2 Forwarding Engine
Total packets Switched : 13534106672944
L3 Forwarding Engine
Total packets L3 Switched : 7264929316950 @ 228064 pps
Total Packets Bridged : 3492211276
Total Packets FIB Switched : 7210651379282
Total Packets ACL Routed : 0
Total Packets Netflow Switched : 1
Total Mcast Packets Switched/Routed : 68097738
Total ip packets with TOS changed : 38527077597
Total ip packets with COS changed : 5186771
Total non ip packets COS changed : 0
Total packets dropped by ACL : 2480178486
Total packets dropped by Policing : 5999570
Total packets exceeding CIR : 7349955
Total packets exceeding PIR : 7349955
Errors
MAC/IP length inconsistencies : 303
Short IP packets received : 0
IP header checksum errors : 140
TTL failures : 933512031
MTU failures : 186689
----------------------------------------------------------------------------------
gp#sho int gi9/29 flow
Port Send FlowControl Receive FlowControl RxPause TxPause
admin oper admin oper
----- -------- -------- -------- -------- ------- -------
Gi9/29 desired off off off 0 0
gp#sho int gi9/29 stats
GigabitEthernet9/29
Switching path Pkts In Chars In Pkts Out Chars Out
Processor 17357 91475075 17485 91588871
Route cache 0 0 1 40
Distributed cache 683233031 154080580279 1244084298 1388566226885
Total 683250388 154172055354 1244101784 1388657815796
gp#sho int gi9/29 capa
GigabitEthernet9/29
Dot1x: yes
Model: WS-X6748-GE-TX
Type: 10/100/1000BaseT
Speed: 10,100,1000,auto
Duplex: half,full
Trunk encap. type: 802.1Q,ISL
Trunk mode: on,off,desirable,nonegotiate
Channel: yes
Broadcast suppression: percentage(0-100)
Flowcontrol: rx-(off,on,desired),tx-(off,on,desired)
Membership: static
Fast Start: yes
QOS scheduling: rx-(2q8t), tx-(1p3q8t)
CoS rewrite: yes
ToS rewrite: yes
Inline power: no
SPAN: source/destination
UDLD yes
Link Debounce: yes
Link Debounce Time: no
Ports on ASIC: 25-36
Port-Security: yes
How can we determine what is causing these output drops? What are we missing?
Thanks,
Hank
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