Huge Packet Drops (Tx drops) Observed on NetScaler

Huge Packet Drops (Tx drops) Observed on NetScaler

来源  https://support.citrix.com/article/CTX215843

Article | NetworkingPerformance | Created: 15 Dec 2014 | Modified: 11 Aug 2016

Applicable Products

  • NetScaler

Symptoms or Error

  • Huge packet drops was observed on NetScaler. The drops are TX drops (software drops).
  • Customer attempted to ping NSIP and could see that most of the packet gets dropped. All configured services goes down and comes up frequently. Users could see that application gets disconnected very frequently (Applications have been launched through NetScaler Gateway).
  • We can see from newnslog that "nic_err_congestionlimit_pkts_dropped" and "nic_err_tx_dropped" counters" are incrementing: 
    /var/nslog]$ nsconmsg101 -K newnslog -g nic_err -s disptime=1 -d current | grep congest |more
   6195       0        6159352      48887     6944 nic_err_congestionlimit_pkts_dropped interface(0/1) Wed Dec  3 17:17:38 2014
   6201       0        6208229      48877     6962 nic_err_congestionlimit_pkts_dropped interface(0/1) Wed Dec  3 17:17:45 2014
   6402       0        6257108      48879     6943 nic_err_congestionlimit_pkts_dropped interface(0/1) Wed Dec  3 17:25:32 2014
   6462       0        6305991      48883     6953 nic_err_congestionlimit_pkts_dropped interface(0/1) Wed Dec  3 17:27:45 2014
   6468       0        6354868      48877     6932 nic_err_congestionlimit_pkts_dropped interface(0/1) Wed Dec  3 17:27:52 2014
   6805       0        6403744      48876     6942 nic_err_congestionlimit_pkts_dropped interface(0/1) Wed Dec  3 17:40:55 2014
/var/nslog]$ nsconmsg101 -K newnslog -g nic_err_tx_dropped -s time=04Dec2014:17:00 -s disptime=1 -d current | more
 
reltime:mili second between two records Thu Dec  4 17:06:08 2014
  Index   rtime totalcount-val      delta rate/sec symbol-name&device-no&time
      0 2697427        8897070      48877     6942 nic_err_tx_dropped interface(0/1) Thu Dec  4 17:06:08 2014
      1    7040        8945947      48877     6942 nic_err_tx_dropped interface(0/1) Thu Dec  4 17:06:15 2014
      2    7170        8994878      48931     6824 nic_err_tx_dropped interface(0/1) Thu Dec  4 17:06:22 2014
      3   78151        9092633      97755    13885 nic_err_tx_dropped interface(0/1) Thu Dec  4 17:07:40 2014

Solution

Ensure that you are not using Management port (interface 0/1) for production traffic.

The best practice is to use management card only for Management traffic and the Network card for the Production traffic.

Management interfaces uses software RSS instead of hardware RSS, so this can impact performance.

Enabled the interface 1/1 and then disabled the interface 0/1.

Problem Cause

Management port (interface 0/1) used for production/data traffic.

 

see https://discussions.citrix.com/topic/390985-rx-drops-in-vpx-inf-11/  ---  RX Drops in VPX inf 1/1

Shell Command : nsconmsg101 -K newnslog -g nic_err -d statswt0

NetScaler VPX Loses Network Connectivity on VMware ESXi 5.1.0 2191751, VMware ESXi 5.5 2143827 and also on VMware ESXi 6.0

来源 https://support.citrix.com/article/CTX200278

Article | ConnectivityNetworkingThird PartyFixed Issues | 163 found this helpful | Created: 05 Nov 2014 | Modified: 29 Sep 2016

Applicable Products

  • NetScaler

Symptoms or Error

The following are the issues encountered when NetScaler VPX is run on VMware ESXi 5.1.0 2191751, VMware ESXi 5.5 2143827 and also on VMware ESXi 6.0 

  • Network disconnectivity.

  • NetScaler GUI access is affected.

  • When running show interfaces command from NetScaler CLI you might notice that one of the interfaces has stalls and errors.

Solution

To fix this issue upgrade to NetScaler 10.5 build 55.8. This firmware can be download from Citrix Downloads.

For more information, see Fixed Issues section from NetScaler 10.5 Build 55.8 Release Notes.

The following are the workarounds for this issue:

Workaround 1

Install NetScaler VPX appliance on a previously known good VMware version and build.

Workaround 2

  1. SSH and log on to Citrix NetScaler VPX appliance as nsroot.

  2. Type shell.

  3. Change directory (cd) to /flash/boot.

  4. Create file /flash/boot/loader.conf.local (if not present) with same permissions as/flash/boot/loader.conf. Add the following line and reboot:
    hw.em.txd=512
    Note: To create the file, use command touch loader.conf.local.

vi Commands

The following are the vi commands to edit the document:

  1. From NetScaler shell type:
    vi <filename>

  2. Move the cursor to the last character of text in the file, type "a" and click Enter.

  3. Type the line:
    hw.em.txd=512

  4. Press the ESC key and then ":" key. The cursor will move to the bottom of the page, then type wq!.

Problem Cause

NetScaler VPX network connectivity issue on VMware ESXi 5.1.0 build 2191751 and VMware ESXi 5.5 build 2143827 is caused by "tx_ring_length" mismatch, which causes TX stalls.

Additional Resources

For more information refer to VMware Knowledge Base - 2092809.

 

Netscaler NIC Counters

来源 https://support.citrix.com/article/CTX125102

Article | Other | Created: 14 Jun 2017 | Modified: 14 Jun 2017

Applicable Products

  • NetScaler

Information

This article provides a correlation of the newnslog NIC counters, their SNMP counterpart, and a brief description.

Newnslog NIC Counter

The table below lists the 59 different newnslog NIC counters, a simple description of the counter, and the matching SNMP object name.

Newnslog Counter Name

SNMP Name

Description

nic_tot_rx_bytes

TotRxBytes

Number of bytes received by this interface

nic_rx_avg_bandwidth

RxAvgBandwidthUsage

The average rx bandwidth on interface in bits per second

nic_tot_rx_packets

TotRxPkts

Number of packets received by this interface

nic_rx_avg_packet_rate

RxAvgPacketRate

The average rate of incoming packets on the interface since the system start

nic_tot_rx_mbits

TotRxMbits

Number of megabits received by this interface

nic_tot_tx_bytes

TotTxBytes

Number of bytes transmitted by this interface

nic_tx_avg_bandwidth

TxAvgBandwidthUsage

The average tx bandwidth on interface in bits per second

nic_tot_tx_packets

TotTxPkts

Number of packets transmitted by this interface

nic_tx_avg_packet_rate

TxAvgPacketRate

The average rate of outgoing packets on the interface since the system start

nic_tot_tx_mbits

TotTxMbits

Number of megabits transmitted by this interface

nic_tot_multicast_pkts

nicTotMulticastPkts

Number of multicast packets received by this interface

nic_tot_netscaler_pkts

TotNetScalerPkts

Number of NetScaler packets received by this interface

nic_tot_rx_lacpdus

RxLacpdu

Number of LACPDUs received by this interface

nic_tot_tx_lacpdus

TxLacpdu

Number of LACPDUs transmitted by this interface

nic_err_rx

ErrPktRx

Number of erroneous packets received by this interface

nic_err_tx

ErrPktTx

Number of errors encountered during transmitting by this interface

nic_cur_link_state

CurLinkState

Current link state

nic_cur_link_uptime

CurLinkUptime

Current link uptime

nic_cur_link_downtime

CurLinkDowntime

Current link downtime

nic_err_dropped_pkts

ErrDroppedRxPkts

Number of received packets dropped by this interface

nic_err_tx_dropped

ErrDroppedTxPkts

Number of packets dropped in transmission by this interface

nic_tot_bdg_mac_moved

TotMacMoved

Number of times MAC moved between ports

nic_err_bdg_muted

ErrNicMuted

Number of times NIC become bridging-muted because of loop detection

nic_cur_txqlen

CurTxQLen

Number of packets queued for transmission

nic_err_link_hangs

ErrLinkHangs

Number of NIC hangs detected

nic_err_duplex_mismatch

ErrDuplexMismatch

Number of duplex mismatches detected

nic_err_rx_nonsb

ErrTxNoNSB

Number of times there was not enough memory for processing of the received data

nic_err_rx_crc

RxCRCErrors

Number of received packets with CRC errors (alignment or FCS)

nic_err_rx_long_frame

RxFrameErrors

Number of too long packets received on the interface

nic_err_rx_alignment

RxAlignmentErrors

The number of alignment errors received on the interface

nic_err_ifInDiscards

ErrIfInDiscards

Number of inbound error-free packets discarded internally by NIC

nic_err_ifOutDiscards

nicErrIfOutDiscards

Number of outbound error-free packets discarded

nic_err_link_reinits

LinkReinits

Number of link re-initializations (attempts to establish the link)

nic_err_link_sts_stalls

nicStsStalls

Number of Status stalls detected

nic_err_link_tx_stalls

nicTxStalls

Number of Transmit stalls detected

nic_err_link_rx_stalls

nicRxStalls

Number of Receive stalls detected

nic_err_link_errdisables

nicErrDisables

Number of times link has been error-disabled

nic_cur_Ptxqlen

HpTxQLen

Number of high-priority packets queued for transmission

nic_cur_LPtxqlen

LpTxQLen

Number of low-priority packets queued for transmit

nic_err_tx_nonucpkt

ErrTxNonUcPkt

Number of output non-unicast packets

nic_err_tx_collisions

TxCollisions

Number of collisions in transmission (half-duplex only)

nic_err_tx_excess_collisions

TxExcessCollisions

Number of excess collisions in transmission (half-duplex only)

nic_err_tx_late_collisions

TxLateCollisions

Number of late collisions in transmission (half-duplex only)

nic_err_tx_multi_collision_frame

TxMultiCollisionErrors

Number of multi collision during transmission (half-duplex only)

nic_err_tx_carrier

TxCarrierError

Number of carrier errors during transmission

nic_err_rx_nobufs

ErrRxNoBuffs

Number of times there was no memory for Rx replacement buffers

nic_err_tx_overflow

ErrTxOverflow

Number of times there was an overflow of the Tx ring (Informational)

nic_err_congested_pkts_dropped

ErrCongestedPktsDrops

Number of output packets dropped because of congestion

nic_err_congestionlimit_pkts_dropped

ErrCongestionLimitPktDrops

Number of output packets dropped during the congestion time

nic_err_rx_FCS

ErrRxFCS

Number of packets received with Frame Check Sequence (FCS) errors

nic_err_rx_fifo

ErrRxFIFO

NIC receive FIFO memory overruns

nic_tot_outXoffSent

TotXoffSent

Number of XOFF pause frames sent

nic_tot_outXonSent

TotXonSent

Number of XON pause frames sent

nic_tot_xoffPauseFramesReceived

TotRxXoffPause

Number of XOFF pause frames received

nic_tot_xoffStateEntered

TotXoffStateEntered

Number of times the XOFF state was entered

nic_tot_xonPauseFramesReceived

TotRxXonPause

Number of XON pause frames received

nic_err_tx_deferred

ErrTxDeferred

Number of times a packet transmission was deferred (Informational - half-duplex only)

nic_err_tx_fifo

ErrTxFIFO

NIC transmission FIFO under-runs

nic_err_tx_heartbeat

ErrTxHeartBeat

No 10Mb link heartbeats (Informational - 10Mb half-duplex only)

====================== End

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原文地址：https://www.cnblogs.com/lsgxeva/p/10955711.html