Cisco 7204VXR OC3 Output drops increasing

ahmad82pkn · ‎07-30-2012

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

paolo bevilacqua · ‎07-30-2012

Which NPE?

Config ?

Show proc cpu ?

Show int switching ?

ahmad82pkn · ‎07-30-2012

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

ahmad82pkn · ‎07-31-2012

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

paolo bevilacqua · ‎07-31-2012

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.

Joseph W. Doherty · ‎08-01-2012

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.)

paolo bevilacqua · ‎08-01-2012

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.

Joseph W. Doherty · ‎08-01-2012

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.

ahmad82pkn · ‎08-01-2012

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

paolo bevilacqua · ‎08-01-2012

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

ahmad82pkn · ‎08-01-2012

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)

Joseph W. Doherty · ‎08-01-2012

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.

ahmad82pkn · ‎08-01-2012

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

paolo bevilacqua · ‎08-01-2012

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.

ahmad82pkn · ‎08-01-2012

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?