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
-
SSH and log on to Citrix NetScaler VPX appliance as nsroot.
-
Type shell.
-
Change directory (cd) to /flash/boot.
-
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:
-
From NetScaler shell type:
vi <filename> -
Move the cursor to the last character of text in the file, type "a" and click Enter.
-
Type the line:
hw.em.txd=512 -
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