[c-nsp] Oversubscription on 6509 blade
Richard Roller
rich.roller at gmail.com
Wed Aug 18 19:28:16 EDT 2010
We're seeing overruns on a 6148 module in a 6509-E switch. The overruns
would be considered normal if the ASIC port range was oversubscribed,
however, according to interface traffic levels, it doesn't reach the 1Gb
peak. Output from the 'show int summ' command below shows that Rxbs =
~70Mbps while Txbs = 17Mbs. (if my math is right, and assuming 17-24 is one
Gb ASIC)
Interface IHQ IQD OHQ OQD RXBS RXPS TXBS TXPS TRTL
---------------------------------------------------------------------
* GigabitEthernet6/17 0 0 0 0 0 0 0 0 0
* GigabitEthernet6/18 0 25082261 0 45001 18475000 4897 7468000
6161 0
* GigabitEthernet6/19 0 0 0 0 0 0 0 0 0
* GigabitEthernet6/20 0 24751654 0 44925 19430000 1719 1927000
2407 0
* GigabitEthernet6/21 0 0 0 0 0 0 0 0 0
* GigabitEthernet6/22 0 68270 0 0 15823000 1680 5358000 2661
0
* GigabitEthernet6/23 0 0 0 0 0 0 0 0 0
* GigabitEthernet6/24 0 23521824 0 44281 17227000 1616 2507000
2372 0
GigabitEthernet6/20 is up, line protocol is up (connected)
Hardware is C6k 1000Mb 802.3, address is 0015.faca.ee7f (bia
0015.faca.ee7f)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 5/255
Encapsulation ARPA, loopback not set
Full-duplex, 1000Mb/s
input flow-control is off, output flow-control is desired
Clock mode is auto
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:54, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/24753578/0 (size/max/drops/flushes); Total output
drops: 44925
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 21955000 bits/sec, 1941 packets/sec
5 minute output rate 2132000 bits/sec, 2292 packets/sec
13954662333 packets input, 16851357461096 bytes, 0 no buffer
Received 40269073 broadcasts (409685 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 24753578 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
24094021770 packets output, 7628772920146 bytes, 0 underruns
0 output errors, 0 collisions, 2 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
GigabitEthernet6/22 is up, line protocol is up (connected)
Hardware is C6k 1000Mb 802.3, address is 0015.faca.ee81 (bia
0015.faca.ee81)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 5/255
Encapsulation ARPA, loopback not set
Full-duplex, 1000Mb/s
input flow-control is off, output flow-control is desired
Clock mode is auto
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:08, output hang never
Last clearing of "show interface" counters 07:30:26
Input queue: 0/2000/70255/0 (size/max/drops/flushes); Total output drops:
0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 21401000 bits/sec, 2163 packets/sec
5 minute output rate 5655000 bits/sec, 2671 packets/sec
75174892 packets input, 71627016585 bytes, 0 no buffer
Received 26519 broadcasts (444 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 70255 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
95130820 packets output, 46628566836 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
Note that I recently cleared the counters on gi6/22 while all the others
have not been cleared. The overruns steadily increment throughout the day.
Any idea what could be causing this? Even if I were to add up the traffic on
all the other interfaces on slot 6, it still wouldn't reach 1Gb. Output from
some other commands are listed below. Thanks.
show catalyst6000
chassis MAC addresses: 1024 addresses from 0014.1b1d.5400 to
0014.1b1d.57ff
traffic meter = 1% Never cleared
peak = 20% reached at 02:43:18 EDT Mon Jun 14 2010
switching-clock: clock switchover and system reset is allowed
show ver
Cisco Internetwork Operating System Software
IOS (tm) s72033_rp Software (s72033_rp-PK9SV-M), Version 12.2(18)SXD4,
RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2005 by cisco Systems, Inc.
Compiled Tue 22-Mar-05 15:33 by yiyan
Image text-base: 0x4002100C, data-base: 0x42318000
ROM: System Bootstrap, Version 12.2(17r)S2, RELEASE SOFTWARE (fc1)
BOOTLDR: s72033_rp Software (s72033_rp-PK9SV-M), Version 12.2(18)SXD4,
RELEASE SOFTWARE (fc1)
uptime is 27 weeks, 6 days, 7 hours, 45 minutes
Time since switched to active is 27 weeks, 6 days, 7 hours, 45 minutes
System returned to ROM by unknown reload cause - suspect
boot_data[BOOT_COUNT] 0x0, BOOT_COUNT 0, BOOTDATA 19 (SP by power-on)
System restarted at 10:28:29 EDT Thu Feb 4 2010
System image file is "sup-bootflash:s72033-pk9sv-mz.122-18.SXD4.bin"
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found
at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
export at cisco.com.
cisco WS-C6509-E (R7000) processor (revision 1.1) with 458720K/65536K bytes
of memory.
Processor board ID SMG0917N3MZ
SR71000 CPU at 600Mhz, Implementation 0x504, Rev 1.2, 512KB L2 Cache
Last reset from power-on
X.25 software, Version 3.0.0.
Bridging software.
121 Virtual Ethernet/IEEE 802.3 interface(s)
214 Gigabit Ethernet/IEEE 802.3 interface(s)
1917K bytes of non-volatile configuration memory.
8192K bytes of packet buffer memory.
65536K bytes of Flash internal SIMM (Sector size 512K).
Configuration register is 0x2102
sho mod
Mod Ports Card Type Model Serial
No.
--- ----- -------------------------------------- ------------------
-----------
1 48 SFM-capable 48 port 10/100/1000mb RJ45 WS-X6548-GE-TX
SAL091594HK
2 4 SLB Application Processor Complex WS-X6066-SLB-APC
SAD093109YD
3 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX
SAL09211LA8
4 48 48 port 10/100/1000mb EtherModule WS-X6148-GE-TX
SAL11499266
5 2 Supervisor Engine 720 (Active) WS-SUP720-3B
SAD0915018N
6 48 48 port 10/100/1000mb EtherModule WS-X6148-GE-TX
SAL094865J7
7 16 16 port 1000mb GBIC ethernet WS-X6416-GBIC
SAD0530058M
Mod MAC addresses Hw Fw Sw
Status
--- ---------------------------------- ------ ------------ ------------
-------
1 0013.80f5.68a8 to 0013.80f5.68d7 10.1 7.2(1) 8.3(0.156)RO Ok
2 0014.a9bd.20f8 to 0014.a9bd.20ff 1.8 4.2(12) Ok
3 0013.c473.0af8 to 0013.c473.0b27 2.2 12.2(14r)S5 12.2(18)SXD4 Ok
4 001e.4a45.4850 to 001e.4a45.487f 7.2 7.2(1) 8.3(0.156)RO Ok
5 0011.5cb4.afdc to 0011.5cb4.afdf 4.3 8.1(3) 12.2(18)SXD4 Ok
6 0015.faca.ee6c to 0015.faca.ee9b 1.1 7.2(1) 8.3(0.156)RO Ok
7 0003.32bd.1fc2 to 0003.32bd.1fd1 1.2 5.4(2) 8.3(0.156)RO Ok
Mod Sub-Module Model Serial Hw
Status
--- --------------------------- ------------------ ------------ -------
-------
3 Centralized Forwarding Card WS-F6700-CFC SAL0917A6G6 2.0 Ok
5 Policy Feature Card 3 WS-F6K-PFC3B SAD09120A3A 2.0 Ok
5 MSFC3 Daughterboard WS-SUP720 SAD091204G5 2.3 Ok
Mod Online Diag Status
--- -------------------
1 Pass
2 Pass
3 Pass
4 Pass
5 Pass
6 Pass
7 Pass
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