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New Member

Cisco 7204VXR OC3 Output drops increasing

Hello Team,

Any idea why my OC3 interface is showing increasing output drops its starts happening as soon traffic exceed 60Mbps   ( FYI my traffic never exceeded 75Mbps MAX, and circuit is 150Mbps from carrier , full OC3)

Any thoughts how i can fix this? Below are few stats as starter.

IOS i am using is c7200p-is-mz.122-31.SB10.bin

sh int pos1/1

POS1/1 is up, line protocol is up

  Hardware is Packet over Sonet

  Internet address is x.x.x.x

  MTU 4470 bytes, BW 155000 Kbit, DLY 100 usec,

     reliability 255/255, txload 83/255, rxload 36/255

  Encapsulation PPP, LCP Open

  Stopped: CDPCP

  Open: IPCP, crc 16, loopback not set

  Keepalive set (10 sec)

  Scramble enabled

  Last input 00:00:00, output never, output hang never

  Last clearing of "show interface" counters 1w1d

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 57260637

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 21988000 bits/sec, 27871 packets/sec

  5 minute output rate 51053000 bits/sec, 26240 packets/sec

     1754515820 packets input, 3457578272 bytes, 0 no buffer

     Received 0 broadcasts (0 IP multicasts)

     1 runts, 18 giants, 0 throttles

              0 parity

     422 input errors, 418 CRC, 0 frame, 0 overrun, 0 ignored, 4 abort

     1667079744 packets output, 2951488384 bytes, 0 underruns

     0 output errors, 0 applique, 242 interface resets

     0 output buffer failures, 0 output buffers swapped out

     0 carrier transitions

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

sh controllers pos 1/1

POS1/1

SECTION

  LOF = 0          LOS    = 0                            BIP(B1) = 0

LINE

  AIS = 0          RDI    = 0          FEBE = 0          BIP(B2) = 0

PATH

  AIS = 0          RDI    = 0          FEBE = 0          BIP(B3) = 0

  PLM = 5          UNEQ   = 0          TIM  = 0          TIU     = 0

  LOP = 0          NEWPTR = 0          PSE  = 3          NSE     = 0

Active Defects: None

Active Alarms:  None

Alarm reporting enabled for: SF SLOS SLOF B1-TCA B2-TCA PLOP B3-TCA

Framing: SONET

APS

  COAPS = 0          PSBF = 0

  State: PSBF_state = False

  Rx(K1/K2): 00/00  Tx(K1/K2): 00/00

  S1S0 = 00, C2 = 16

  Remote aps status (none); Reflected local aps status (none)

CLOCK RECOVERY

  RDOOL = 0

  State: RDOOL_state = False

PATH TRACE BUFFER: STABLE

  Remote hostname : dca-priv-03 so-7/1/2

  Remote interface:

  Remote IP addr  :

  Remote Rx(K1/K2):   /    Tx(K1/K2):   /

BER thresholds:  SF = 10e-3  SD = 10e-6

TCA thresholds:  B1 = 10e-6  B2 = 10e-6  B3 = 10e-6

  Clock source:  line

Interface POS1/1

dma mode : push

Hardware is Packet over SONET (hwidb=0x3EB91F0)

fastsend            = 0x0085CE44, turbofs    = 0x05DFBF60

multicast fs        = 0x00000000

SFP is SFP-OC3-MM OC3 MM

Serial Number : YAAY0016

Framer is PMC PM5379 S/UNI-4x155 1 0

Receive side:

  1455581673090 bytes, 10348619754 frames, 1 overrun interrupts

Transmit side:

  3297935862601 bytes, 10260849591 frames, 0 aborts

PHY link is UP

Device instance   = 0x03EBB3D8

PCI device base   = 0xE0000000, Framer base       = 0xE0010000

TX FPGA base      = 0xE00A0000, RX FPGA base      = 0xE04A0000

TX SRAM base      = 0xE0200000, RX SRAM base      = 0xE0600000

TX SRAM size (KB) = 0         , RX SRAM size (KB) = 0

TX PLX base       = 0xE0000000, RX PLX base       = 0xE0400000

PA TX ring base   = 0x00000000, PA RX ring base   = 0xE04B0000

TX ring base      = 0x00000000, RX ring base      = 0x385A5E80

tx_upd_addr       = 0x38377240, tx_write_addr     = 0xE00C0000

txr_mp_shadow     = 0x00000000, txr_pak_shadow    = 0x00000000

rx_upd_addr       = 0x38387340, rx_upd_addr (val) = 91

rxr_shadow        = 0x03EBB784, rx_pak            = 0x03CA4274

max_particles=36, input_err_rate=0, tx_fullring=0

tx_limited=0, mci_txcount_enabled=0, mci_txcount=256

rx_head=75, tx_head=0, tx_tail=0, tx_count=1

rx_int=3435852815, tx_int=578546419

rx_enabled=1

TX FPGA registers:

reset           = 0x2C000100, abrt_cnt           = 0x00000000

wr_ptr          = 0x0005EAE0, rd_ptr             = 0x0005EAE0

part_size       = 0x00000000, bd_wr_cnt          = 0x02050700

act_bd_idx      = 0xAA55AA55, lst_rcvd_bd_idx    = 0xAA55AA55

fifo_full       = 0xAA55AA55, fifo_full_upd_addr = 0x38377240

led_cntrl       = 0x00000000, pak_cnt_back       = 0x6398E6AE

pak_cnt_front   = 0x6398E6AE, no_traf_lat_timer  = 0xAA55AA55

dbg_reg_front   = 0x00000000, dbg_reg_back       = 0x00000000

RX FPGA registers:

reset           = 0x43000008, fifo_full_cnt      = 0xAA55AA55

wr_ptr          = 0x0004BAD8, rd_ptr             = 0x0004BAD4

pkt_index_addr  = 0x38387340, hst_rng_strt       = 0x385A5E80

part_size       = 0xAA55AA55, bd_wr_cnt          = 0xAA55AA55

actv_bd_idx     = 0x80000077, lst_rcvd_bd_idx    = 0x0000006D

lst_part_wr_ptr = 0x0004BD78, int_idle_tmr       = 0xAA55AA55

bad_bd_rx_fifo  = 0x00000000, clock_select       = 0x00000000

sfp_reg         = 0x00000020, pak_cnt_host       = 0x0072C13D

pak_fmr_good    = 0x0072DA6F, pak_fmr_err        = 0x00000000

dbg_reg_int_sm  = 0x003A0042, dbg_reg_pl3_mict   = 0xAA55AA55

TX PLX registers:

cfid     = 0x905610B5, cfcs     = 0x02B00006, cfrv  = 0x068000BA

cflt     = 0x0000FF00, cbmem    = 0xE0000000, cbio  = 0x00000001

cblocal0 = 0xE0000000, cblocal1 = 0x00000000, cbrom = 0x00000000

cfit     = 0x00000100

range_pci_local0    = 0xFFC00000, remap_pci_local0        = 0x00010001

mode_arb_reg        = 0x03200000, big_little_endian_reg   = 0x00300500

range_pci_rom       = 0x00000000, remap_pci_rom           = 0x0000001F

bus_desc_pci_local0 = 0x410301C3, range_local_pci         = 0x00000000

cb_local_pci        = 0x00000000, cb_local_pci_io         = 0x00000000

remap_local_pci     = 0x000004A9, cfg_addr_reg_lcl_pci_io = 0x00000000

dma_chan0_mode      = 0x000001C3, dma_chan1_mode          = 0x000001C3

range_pci_local1    = 0xFFFFFFF0, remap_pci_local1        = 0x00000000

bus_desc_pci_local1 = 0x0000010B

RX PLX registers:

cfid     = 0x905610B5, cfcs     = 0x02B00006, cfrv  = 0x068000BA

cflt     = 0x0000FF00, cbmem    = 0xE0400000, cbio  = 0x00000001

cblocal0 = 0xE0400000, cblocal1 = 0x00000000, cbrom = 0x00000000

cfit     = 0x00000100

range_pci_local0    = 0xFFC00000, remap_pci_local0        = 0x00420001

mode_arb_reg        = 0x03200000, big_little_endian_reg   = 0x00300500

range_pci_rom       = 0x00000000, remap_pci_rom           = 0x0000001F

bus_desc_pci_local0 = 0x41030143, range_local_pci         = 0x00000000

cb_local_pci        = 0x00000000, cb_local_pci_io         = 0x00000000

remap_local_pci     = 0x000004A9, cfg_addr_reg_lcl_pci_io = 0x00000000

dma_chan0_mode      = 0x000001C3, dma_chan1_mode          = 0x000001C3

range_pci_local1    = 0xFFFFFFF0, remap_pci_local1        = 0x00000000

bus_desc_pci_local1 = 0x0000010B

17 REPLIES
Hall of Fame Super Gold

Cisco 7204VXR OC3 Output drops increasing

Which NPE?

Config ?

Show proc cpu ?

Show int switching ?

New Member

Cisco 7204VXR OC3 Output drops increasing

1-NPE-G2

2- sh run int pos1/1

ip address x.x.x

ip accounting output-packets

ip flow ingress

encapsulation ppp

pos scramble-atm

About show proc cpu and show in switching, i will post output tomorrow when issue is occuring, at this time, traffic is less than 30Mbps and issue not occuring. will post tomorrow. thank you for your participation

New Member

Cisco 7204VXR OC3 Output drops increasing

here is output of show process cpu

HAMP7204VXR#sh processes cpu

CPU utilization for five seconds: 49%/49%; one minute: 50%; five minutes: 51%

PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process

   1           0         3          0  0.00%  0.00%  0.00%   0 Chunk Manager

   2        1052   5385769          0  0.00%  0.00%  0.00%   0 Load Meter

   3           0      5135          0  0.00%  0.00%  0.00%   0 TACACS+

   4     6493648   2735131       2374  0.00%  0.04%  0.00%   0 Check heaps

   5         776     12209         63  0.00%  0.00%  0.00%   0 Pool Manager

   6           0         2          0  0.00%  0.00%  0.00%   0 Timers

   7           0         2          0  0.00%  0.00%  0.00%   0 Serial Backgroun

   8           0         2          0  0.00%  0.00%  0.00%   0 ATM Idle Timer

   9           0         2          0  0.00%  0.00%  0.00%   0 ATM AutoVC Perio

  10           0         2          0  0.00%  0.00%  0.00%   0 ATM VC Auto Crea

  11         196   5385408          0  0.00%  0.00%  0.00%   0 ALARM_TRIGGER_SC

  12           0         1          0  0.00%  0.00%  0.00%   0 AAA_SERVER_DEADT

  13         308    406737          0  0.00%  0.00%  0.00%   0 AAA high-capacit

  14           0         1          0  0.00%  0.00%  0.00%   0 Policy Manager

  15           0         1          0  0.00%  0.00%  0.00%   0 Crash writer

  16   116983612 484040505        241  0.00%  0.26%  0.17%   0 EnvMon

  17           0         1          0  0.00%  0.00%  0.00%   0 OIR Handler

  18          16    448855          0  0.00%  0.00%  0.00%   0 IPC Dynamic Cach

  19           0         1          0  0.00%  0.00%  0.00%   0 IPC Zone Manager

  20        1076  26917929          0  0.00%  0.00%  0.00%   0 IPC Periodic Tim

  21           0         1          0  0.00%  0.00%  0.00%   0 IPC Managed Time

  22         680  26917929          0  0.00%  0.00%  0.00%   0 IPC Deferred Por

  23           0         1          0  0.00%  0.00%  0.00%   0 IPC Seat Manager

  24           0         1          0  0.00%  0.00%  0.00%   0 IPC Session Serv

  25          68   2693014          0  0.00%  0.00%  0.00%   0 Compute SRP rate

  26      207872   4714253         44  0.00%  0.00%  0.00%   0 ARP Input

  27        2096  28077569          0  0.00%  0.00%  0.00%   0 ARP Background

  28           8       577         13  0.00%  0.00%  0.00%   0 EEM ED Syslog

  29           0         1          0  0.00%  0.00%  0.00%   0 CEF MIB API

  30           0        10          0  0.00%  0.00%  0.00%   0 DDR Timers

  31           0         6          0  0.00%  0.00%  0.00%   0 Entity MIB API

  32           0         1          0  0.00%  0.00%  0.00%   0 SERIAL A'detect

  33           0         1          0  0.00%  0.00%  0.00%   0 RFS server proce

  34         772  26917927          0  0.00%  0.00%  0.00%   0 GraphIt

  35           0         2          0  0.00%  0.00%  0.00%   0 Dialer event

  36           0         1          0  0.00%  0.00%  0.00%   0 Critical Bkgnd

  37     4840536   8725271        554  0.07%  0.02%  0.02%   0 Net Background

  38           0         2          0  0.00%  0.00%  0.00%   0 IDB Work

  39           4       917          4  0.00%  0.00%  0.00%   0 Logger

  40        1712  26917923          0  0.00%  0.00%  0.00%   0 TTY Background

  41       47752  26918101          1  0.07%  0.05%  0.07%   0 Per-Second Jobs

PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process

  42     2068352    458658       4509  0.00%  0.00%  0.00%   0 Per-minute Jobs

  43           0         2          0  0.00%  0.00%  0.00%   0 PrstVbl

  44           0         8          0  0.00%  0.00%  0.00%   0 IF-MGR control p

  45           0        97          0  0.00%  0.00%  0.00%   0 IF-MGR event pro

  46           0         1          0  0.00%  0.00%  0.00%   0 Inode Table Dest

  47        5360   7856895          0  0.00%  0.00%  0.00%   0 HC Counter Timer

  48           0         1          0  0.00%  0.00%  0.00%   0 CSP Timer

  49           0         2          0  0.00%  0.00%  0.00%   0 CES Timer

  50           0         2          0  0.00%  0.00%  0.00%   0 Hawkeye Backgrou

  51           0         1          0  0.00%  0.00%  0.00%   0 FPD Management P

  52           0         1          0  0.00%  0.00%  0.00%   0 FPD Action Proce

  53           0         1          0  0.00%  0.00%  0.00%   0 SONET alarm time

  54           0         1          0  0.00%  0.00%  0.00%   0 POS APS Event Pr

  55           0        35          0  0.00%  0.00%  0.00%   0 Collection proce

  56           4         2       2000  0.00%  0.00%  0.00%   0 VNM DSPRM MAIN

  57           0         1          0  0.00%  0.00%  0.00%   0 CES Line Conditi

  58           0         2          0  0.00%  0.00%  0.00%   0 Flash MIB Update

  59           0         1          0  0.00%  0.00%  0.00%   0 Flash Card Oir

  60           0         2          0  0.00%  0.00%  0.00%   0 ATM OAM Input

  61           0         2          0  0.00%  0.00%  0.00%   0 ATM OAM TIMER

  62           0       153          0  0.00%  0.00%  0.00%   0 TurboACL

  63           0         2          0  0.00%  0.00%  0.00%   0 TurboACL chunk

  64           0         3          0  0.00%  0.00%  0.00%   0 CEF switching ba

  65           0         2          0  0.00%  0.00%  0.00%   0 AAA Dictionary R

  66         164      4761         34  0.00%  0.00%  0.00%   0 AAA Server

  67         304      9798         31  0.00%  0.00%  0.00%   0 AAA ACCT Proc

  68        3480 838286867          0  0.00%  0.01%  0.00%   0 ACCT Periodic Pr

  69           0         1          0  0.00%  0.00%  0.00%   0 AAA System Acct

  70          16        58        275  0.00%  0.00%  0.00%   0 IP ARP Adjacency

  71     5616820  82859569         67  0.07%  0.03%  0.02%   0 IP Input

  72           0         1          0  0.00%  0.00%  0.00%   0 ICMP event handl

  73           0         2          0  0.00%  0.00%  0.00%   0 IPAM/ODAP Events

  74        4364 838286890          0  0.00%  0.00%  0.00%   0 IPAM Manager

  75           0         2          0  0.00%  0.00%  0.00%   0 IPAM Events

  76        9460 376854483          0  0.07%  0.03%  0.02%   0 PPP manager

  77          36     43853          0  0.00%  0.00%  0.00%   0 PPP SIP

  78           0         2          0  0.00%  0.00%  0.00%   0 PPP Bind

  79           0        15          0  0.00%  0.00%  0.00%   0 PPP IP Route

  80          52     21951          2  0.00%  0.00%  0.00%   0 SSS Manager

  81           0         1          0  0.00%  0.00%  0.00%   0 SSS Policy Manag

  82           0        31          0  0.00%  0.00%  0.00%   0 SSS Feature Mana

  83        2608 105167290          0  0.00%  0.00%  0.00%   0 SSS Feature Time

  84           0         1          0  0.00%  0.00%  0.00%   0 SG DPM

PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process

  85           0         1          0  0.00%  0.00%  0.00%   0 Timer handler fo

  86           0         1          0  0.00%  0.00%  0.00%   0 Prepaid response

  87           0         1          0  0.00%  0.00%  0.00%   0 Timed Policy act

  88           0         1          0  0.00%  0.00%  0.00%   0 AAA response han

  89          20     65831          0  0.00%  0.00%  0.00%   0 SSM connection m

  90           0         2          0  0.00%  0.00%  0.00%   0 Spanning Tree

  91         368  11599288          0  0.00%  0.00%  0.00%   0 BGP Scheduler

  92           0         1          0  0.00%  0.00%  0.00%   0 VPDN call manage

  93           0         1          0  0.00%  0.00%  0.00%   0 L2X Socket proce

  94           0         2          0  0.00%  0.00%  0.00%   0 L2TP mgmt daemon

  95           0         1          0  0.00%  0.00%  0.00%   0 TC SIP

  96           0         2          0  0.00%  0.00%  0.00%   0 IP PORTBUNDLE

  97           0         1          0  0.00%  0.00%  0.00%   0 SG CMD HANDLER

  98         136   6575070          0  0.00%  0.00%  0.00%   0 IP SIP Process

  99        3888 838286922          0  0.00%  0.00%  0.00%   0 RADIUS Proxy

100           0         1          0  0.00%  0.00%  0.00%   0 IPv6 RIB Redistr

101        7140    538646         13  0.00%  0.00%  0.00%   0 CEF background p

102           0         1          0  0.00%  0.00%  0.00%   0 IP IRDP

103           0         2          0  0.00%  0.00%  0.00%   0 SNMP Timers

104           0         3          0  0.00%  0.00%  0.00%   0 Flow Exporter Ti

105       12364  37757172          0  0.00%  0.00%  0.00%   0 CEF: IPv4 proces

106           0       135          0  0.00%  0.00%  0.00%   0 ADJ background

107       131322405976846          0  0.07%  0.11%  0.10%   0 HQF Shaper Backg

108           0         1          0  0.00%  0.00%  0.00%   0 HQF IDB Associat

109        4056  28933121          0  0.00%  0.00%  0.00%   0 TCP Timer

110         312      3015        103  0.00%  0.00%  0.00%   0 TCP Protocols

111        1284  27912991          0  0.00%  0.00%  0.00%   0 Socket Timers

112           0     89774          0  0.00%  0.00%  0.00%   0 HTTP CORE

113           0         2          0  0.00%  0.00%  0.00%   0 SCTP Main Proces

114           0         1          0  0.00%  0.00%  0.00%   0 Probe Input

115           0         1          0  0.00%  0.00%  0.00%   0 RARP Input

116        6976  53820079          0  0.00%  0.00%  0.00%   0 DHCPD Receive

117        4344    593046          7  0.00%  0.00%  0.00%   0 IP Background

118        2392    454208          5  0.00%  0.00%  0.00%   0 IP RIB Update

119       77400   4027628         19  0.00%  0.00%  0.00%   0 CDP Protocol

121           0         2          0  0.00%  0.00%  0.00%   0 PPP Compress Inp

122           0         2          0  0.00%  0.00%  0.00%   0 PPP Compress Res

123        3436 268535314          0  0.00%  0.00%  0.00%   0 RBSCP Background

124           0         1          0  0.00%  0.00%  0.00%   0 COPS

125           0         1          0  0.00%  0.00%  0.00%   0 X.25 Encaps Mana

126           0         1          0  0.00%  0.00%  0.00%   0 PAD InCall

127           0         2          0  0.00%  0.00%  0.00%   0 X.25 Background

128           0         2          0  0.00%  0.00%  0.00%   0 Dialer Forwarder

PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process

129         428   5385719          0  0.00%  0.00%  0.00%   0 L2F management d

130           0         1          0  0.00%  0.00%  0.00%   0 PPTP Mgmt

131           0         2          0  0.00%  0.00%  0.00%   0 IP Inband Sessio

132           0         3          0  0.00%  0.00%  0.00%   0 gk process

133           0         3          0  0.00%  0.00%  0.00%   0 LOCAL AAA

134           0         2          0  0.00%  0.00%  0.00%   0 ENABLE AAA

135           0         2          0  0.00%  0.00%  0.00%   0 LINE AAA

136           0         1          0  0.00%  0.00%  0.00%   0 EM Background Pr

137          20     21938          0  0.00%  0.00%  0.00%   0 IDMGR CORE

138        8072     78128        103  0.00%  0.00%  0.00%   0 TPLUS

139           0         1          0  0.00%  0.00%  0.00%   0 TSP

140           0         1          0  0.00%  0.00%  0.00%   0 VOIP RTP Udp Inp

141           0         1          0  0.00%  0.00%  0.00%   0 QOS_MODULE_MAIN

142           0         1          0  0.00%  0.00%  0.00%   0 CCVPM_HTSP

143           0         1          0  0.00%  0.00%  0.00%   0 CCVPM_R2

144           0         1          0  0.00%  0.00%  0.00%   0 CCSWVOICE

145           0         2          0  0.00%  0.00%  0.00%   0 Proxy Session Ap

146         204   2692995          0  0.00%  0.00%  0.00%   0 RMON Recycle Pro

147           0         2          0  0.00%  0.00%  0.00%   0 RMON Deferred Se

148           0         1          0  0.00%  0.00%  0.00%   0 SYSMGT Events

149         172     13972         12  0.00%  0.00%  0.00%   0 AAA SEND STOP EV

150           0         1          0  0.00%  0.00%  0.00%   0 SONET Traps

151        1116   5395021          0  0.00%  0.00%  0.00%   0 EEM Server

152           0         2          0  0.00%  0.00%  0.00%   0 EEM ED SNMP

153          76    448887          0  0.00%  0.00%  0.00%   0 EEM ED Timer

154           0         2          0  0.00%  0.00%  0.00%   0 EEM ED Counter

155           0         2          0  0.00%  0.00%  0.00%   0 EEM ED Interface

156           0         3          0  0.00%  0.00%  0.00%   0 EEM ED IOSWD

157       97708   5440520         17  0.00%  0.00%  0.00%   0 OSPF-6 Hello

158           0         2          0  0.00%  0.00%  0.00%   0 EEM ED None

159           0         3          0  0.00%  0.00%  0.00%   0 EEM ED CLI

160           0         2          0  0.00%  0.00%  0.00%   0 EEM ED OIR

161           0         2          0  0.00%  0.00%  0.00%   0 EEM ED Track

162        3184   1021981          3  0.00%  0.00%  0.00%   0 IP SLA Monitor R

163           0         1          0  0.00%  0.00%  0.00%   0 RMON Packets

164           0         2          0  0.00%  0.00%  0.00%   0 EEM Policy Direc

165           0         1          0  0.00%  0.00%  0.00%   0 VPDN Test

166         596  26909884          0  0.00%  0.00%  0.00%   0 trunk conditioni

167           0         1          0  0.00%  0.00%  0.00%   0 trunk conditioni

168       17140    896720         19  0.00%  0.00%  0.00%   0 Net Input

169        4672   5385740          0  0.00%  0.00%  0.00%   0 Compute load avg

170           0         1          0  0.00%  0.00%  0.00%   0 TCP Driver

171           0         3          0  0.00%  0.00%  0.00%   0 TCP Listener

PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process

172          16    224430          0  0.00%  0.00%  0.00%   0 CC-API_VCM

173        5936 268535381          0  0.00%  0.00%  0.00%   0 CCPROXY_CT

174           0         1          0  0.00%  0.00%  0.00%   0 CCPROXY_UDP

175      449224  10554985         42  0.00%  0.00%  0.00%   0 IP SNMP

176      115220   5413339         21  0.00%  0.00%  0.00%   0 PDU DISPATCHER

177      919316   9276850         99  0.00%  0.00%  0.00%   0 SNMP ENGINE

178        4884       134      36447  0.00%  0.00%  0.00%   0 SNMP ConfCopyPro

179           0         1          0  0.00%  0.00%  0.00%   0 SNMP Traps

180        1880  27332074          0  0.00%  0.00%  0.00%   0 NTP

181           0         1          0  0.00%  0.00%  0.00%   0 xcpa-driver

182          24    224429          0  0.00%  0.00%  0.00%   0 DHCPD Timer

183          16    448860          0  0.00%  0.00%  0.00%   0 DHCPD Database

184           8        29        275  0.00%  0.00%  0.00%   0 IP-EIGRP Router

185      154404  18526276          8  0.00%  0.00%  0.00%   0 IP-EIGRP(0): PDM

186          44       102        431  0.07%  0.02%  0.00%   2 Virtual Exec

187        7220  26477679          0  0.00%  0.00%  0.00%   0 OSPF-6 Router

188      111060  42769069          2  0.00%  0.00%  0.00%   0 IP-EIGRP(0): HEL

189       11032 376865574          0  0.00%  0.01%  0.00%   0 PPP Events

190         520  12099464          0  0.00%  0.00%  0.00%   0 Multilink PPP

191           0         1          0  0.00%  0.00%  0.00%   0 Multilink event

192       14212   1210683         11  0.00%  0.00%  0.00%   0 BGP Router

193       12184   1179968         10  0.00%  0.00%  0.00%   0 BGP I/O

194       95920    792096        121  0.00%  0.00%  0.00%   0 BGP Scanner

195           0         2          0  0.00%  0.00%  0.00%   0 BGP Event

196           0         1          0  0.00%  0.00%  0.00%   0 IP Flow Backgrou

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

the show interface switching command doesnt seem to be recognized in my IOS.

HAMP7204VXR#sh interfaces pos1/1 swi?

% Unrecognized command

HAMP7204VXR#sh int swi

HAMP7204VXR#sh int swi?

% Unrecognized command

Hall of Fame Super Gold

Cisco 7204VXR OC3 Output drops increasing

Just type show interface x/y switching and include the command.

Also include show interface and show running interface, for the interface where packets are input first.

Super Bronze

Cisco 7204VXR OC3 Output drops increasing

Disclaimer

The  Author of this posting offers the information contained within this  posting without consideration and with the reader's understanding that  there's no implied or expressed suitability or fitness for any purpose.  Information provided is for informational purposes only and should not  be construed as rendering professional advice of any kind. Usage of this  posting's information is solely at reader's own risk.

Liability Disclaimer

In  no event shall Author be liable for any damages whatsoever (including,  without limitation, damages for loss of use, data or profit) arising out  of the use or inability to use the posting's information even if Author  has been advised of the possibility of such damage.

Posting

How do you know your traffic never exceeds 75 Mbps, especially down at millisecond intervals?

Assuming you have transient burst congestion, try setting your queue depth to support about 1/2 BDP (bandwidth delay product).  (I suspect the default 40 is too shallow.)

Hall of Fame Super Gold

Cisco 7204VXR OC3 Output drops increasing

That is right, 40 can be too little for OC3.

Note that when doign calculation on Internet routers, one cannot know the delay, because they talk to all the world.

Super Bronze

Cisco 7204VXR OC3 Output drops increasing

Disclaimer

The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

Liability Disclaimer

In   no event shall Author be liable for any damages whatsoever (including,   without limitation, damages for loss of use, data or profit) arising  out  of the use or inability to use the posting's information even if  Author  has been advised of the possibility of such damage.

Posting

Paolo Bevilacqua wrote:

Note that when doign calculation on Internet routers, one cannot know the delay, because they talk to all the world.

Agreed, but you could either calculate based on where most traffic goes or calculate for worst case, perhaps 250 ms for the latter.

New Member

Cisco 7204VXR OC3 Output drops increasing

So should i change my queue setting to 80?

if yes will below command be correct?

int pos1/1

  hold-queue 80

or i need to change my queueing strategey from FIFO to RED?

which one to try frist? Since its production router, and making a single change need lots of approvals process:-s

Hall of Fame Super Gold

Cisco 7204VXR OC3 Output drops increasing

What is you input interface, gigabit? If so you can increase hold-queue to 100 or 200 wothjout any problem.

New Member

Cisco 7204VXR OC3 Output drops increasing

Yes there are 3 Giga and 1 Fast interface, and any one could be Input side ,  OC3 is on MPLS side and connecting to carrier.

i will try 100 and lets hope it makes improvement. will keep you updated.

(Just FYI, Carrier end router is Juniper, and they just updated me they are planning to move my circuit over to Cisco on their end as well, Not sure if it will make any difference, but i will definitely update output of both activities and keep you guys posted)

Super Bronze

Re: Cisco 7204VXR OC3 Output drops increasing

Disclaimer

The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

Liability Disclaimer

In   no event shall Author be liable for any damages whatsoever (including,   without limitation, damages for loss of use, data or profit) arising  out  of the use or inability to use the posting's information even if  Author  has been advised of the possibility of such damage.

Posting

I advise against using (W)RED unless you understand how to tune it, especially as Cisco defaults aren't often optimal.

Would suggest increasing queue depth first.  As Paolo suggests, 100 or 200 shouldn't be a problem; or even larger.

For example, assuming 150 Mbps with 100 ms latency and 1500 sized packets, BDP would be 1,250 packets for the queue.  I suggested 1/2 BDP, so up to about 600 might be considered.

PS:

Unlikely you'll see a difference if other side is Cisco vs. Juniper equipment.

New Member

Cisco 7204VXR OC3 Output drops increasing

Also here are stats of my most congested input interface,

It has 75Mbps traffic at this time, but it dont has packet drop or queue drops, though it has default 0/40 queue strategy.

sh int gi0/1

GigabitEthernet0/1 is up, line protocol is up

  Hardware is MV64460 Internal MAC, address is 0004.9bd6.cc1b (bia 0004.9bd6.cc1                                                                                        b)

  Internet address is 10.80.0.8/24

  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

     reliability 255/255, txload 8/255, rxload 18/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full Duplex, 1000Mbps, RJ45, media type is RJ45

  output flow-control is XON, input flow-control is XON

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:00, output 00:00:00, output hang never

  Last clearing of "show interface" counters 10w0d

  Input queue: 0/75/31543/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  30 second input rate 72935000 bits/sec, 31146 packets/sec

  30 second output rate 32239000 bits/sec, 33355 packets/sec

     593384955 packets input, 1626177081 bytes, 0 no buffer

     Received 10742121 broadcasts (1313592 IP multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 4917320 multicast, 0 pause input

     304217807 packets output, 1314771371 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

Hall of Fame Super Gold

Re: Cisco 7204VXR OC3 Output drops increasing

You have a little bit too much input for your WAN circuit

  Input queue: 0/75/31543/0 (size/max/drops/flushes); Total output drops: 0

If you don't want to penalize traffic, it might be time to upgrade circuit or add another one.

New Member

Cisco 7204VXR OC3 Output drops increasing

Above Gi0/1 information is my LAN side of the router, so you mean they is so much traffic entring the router from LAN ?

note: POS1/1 is my WAN side.

so i need two WAN circuits? if so then what is the benefit of having OC3 card/ circuit on 7204 which is half utilized?

Hall of Fame Super Gold

Cisco 7204VXR OC3 Output drops increasing

ahmad82pkn wrote:

Above Gi0/1 information is my LAN side of the router, so you mean they is so much traffic entring the router from LAN ?

note: POS1/1 is my WAN side.

so i need two WAN circuits? if so then what is the benefit of having OC3 card/ circuit on 7204 which is half utilized?

Half utilized on average, but also unable to keep up with bursts coming from three gigabit interface.

Performances aren't cheap

Super Bronze

Re: Cisco 7204VXR OC3 Output drops increasing

Disclaimer

The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

Liability Disclaimer

In   no event shall Author be liable for any damages whatsoever (including,   without limitation, damages for loss of use, data or profit) arising  out  of the use or inability to use the posting's information even if  Author  has been advised of the possibility of such damage.

Posting

Input queue drops aren't unusual on 7200 gig interfaces; often indicates CPU can't keep up with a burst of packets at gig rate.  BTW, what "engine" are you using?

Like egress queuing, one possible solution is to increase input queue depth.  Assuming traffic is bursty, this gives the chance for the CPU to catch up between bursts.

Another possible solution might be to run gig interfaces (especially if you have multiple active) at 100 Mbps, or if possible, have other LAN side device shape slower sending to your 7200.  Here the idea is to allow the 7200 more time to process each packet.

NB: running gig interfaces at 100 Mbps shouldn't be too detrimental if your average traffic is only 60 to 75 Mbps, but if you can't shape to the 7200 and you want more than 100 Mbps (to take full advantage of your OC3), another possible solution might be to run two LAN interfaces at 100 Mbps in an Etherchannel configuration.

NB: gig (duplex) Ethernet can require up to about 3 MPPS to maintain wirerate, and even the NPE-G2 only provides 2 MPPS (fast path) - this is why its forwarding can fall behind with gig bursts.

New Member

Re: Cisco 7204VXR OC3 Output drops increasing

Hi Team, Sorry for coming back late on this.

Thank you for your useful input on this thread.

after changing queue value from 40 to 100, my one issue is resolved that is previously i had 5 to 8% packet loss on circuit, now packet loss is gone its a big step forward for me.

Although outdrops are still there, i somehow didnt read Joseph second last reply, in which he suggested 600 queue size, i just read it.

i will definitely try it and see if output drops also vanishes with this, as per joseph suggestion i have hold my carrier for juniper to cisco movement on their end for the circuit.

will get back tou you guys soon after chaning queue to 600

here are my current stat at peak time

sh int pos1/1

POS1/1 is up, line protocol is up

Description WAN SIDE

  Hardware is Packet over Sonet

     MTU 4470 bytes, BW 155000 Kbit, DLY 100 usec,

     reliability 255/255, txload 119/255, rxload 50/255

  Encapsulation PPP, LCP Open

  Stopped: CDPCP

  Open: IPCP, crc 16, loopback not set

  Keepalive set (10 sec)

  Scramble enabled

  Last input 00:00:00, output never, output hang never

  Last clearing of "show interface" counters 5d11h

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1780162

  Queueing strategy: fifo

  Output queue: 0/100 (size/max)

  5 minute input rate 30751000 bits/sec, 36164 packets/sec

  5 minute output rate 72895000 bits/sec, 36605 packets/sec

     1510929192 packets input, 3528806243 bytes, 0 no buffer

     Received 0 broadcasts (0 IP multicasts)

     0 runts, 0 giants, 0 throttles

              0 parity

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

     1745501896 packets output, 1331683932 bytes, 0 underruns

     0 output errors, 0 applique, 0 interface resets

     0 output buffer failures, 0 output buffers swapped out

     0 carrier transitions

#######################LAN SIDE######################

sh int gi0/1

GigabitEthernet0/1 is up, line protocol is up

  Hardware is MV64460 Internal MAC, address is 0004.9bd6.cc1b (bia 0004.9bd6.cc1                                                                                        b)

  Internet address is 10.80.0.8/24

  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

     reliability 255/255, txload 9/255, rxload 17/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full Duplex, 1000Mbps, RJ45, media type is RJ45

  output flow-control is XON, input flow-control is XON

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:00, output 00:00:00, output hang never

  Last clearing of "show interface" counters 1w1d

  Input queue: 0/75/1/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  30 second input rate 69428000 bits/sec, 29735 packets/sec

  30 second output rate 35568000 bits/sec, 32126 packets/sec

     3981696301 packets input, 1131224550 bytes, 0 no buffer

     Received 20508 broadcasts (166776 IP multicasts)

     0 runts, 0 giants, 0 throttles

     2 input errors, 0 CRC, 0 frame, 0 overrun, 2 ignored

     0 watchdog, 625454 multicast, 0 pause input

     4278761853 packets output, 492860961 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

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