H3C S6805 Series Troubleshooting Manual Download Page 48

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Command

Description

follow job job-id

Displays the stack of a job.

Troubleshooting other issues

Layer 2 forwarding failure

Symptom

Layer 2 packet loss occurs when the switch forwards packets to a peer on the same network
segment and in the same VLAN.

Troubleshooting flowchart

Figure 18 Troubleshooting Layer 2 packet loss failure

Incoming error packets?

Yes

Troubleshoot the

problem

End

Yes

Layer 2 packet loss

Packets filtered by

ACLs or QoS policies?

Troubleshoot the

problem

Port blocked?

Troubleshoot the

problem

Yes

Port misconfigurations?

Locate and modify

misconfigurations

Yes

Port congestion?

Troubleshoot the

problem

Yes

Resolved?

Yes

Resolved?

Contact the

Support

Summary of Contents for S6805 Series

Page 1: ...part of this manual may be reproduced or transmitted in any form or by any means without prior written consent of New H3C Technologies Co Ltd Except for the trademarks of New H3C Technologies Co Ltd...

Page 2: ...for ACLs 10 Symptom 10 Troubleshooting flowchart 10 Solution 10 Applied ACLs fail to take effect 11 Symptom 11 Troubleshooting flowchart 12 Solution 12 Troubleshooting IRF 14 IRF fabric setup failure...

Page 3: ...ubleshooting EVPN 37 EBGP or IBGP neighbor relationship setup failure 37 Symptom 37 Troubleshooting flowchart 37 Solution 37 ECMP forwarding failure 38 Symptom 38 Troubleshooting flowchart 39 Solution...

Page 4: ...t from the commands executed during the troubleshooting process To ensure safety wear an ESD wrist strap when you replace or maintain a hardware component If hardware replacement is required use the r...

Page 5: ...es including the following items Device status CPU status Memory status Configuration status Software entries Hardware entries Collecting common log messages 1 Save common log messages from the log bu...

Page 6: ...You can collect operating statistics by saving the statistics to a file or displaying the statistics on the screen When you collect operating statistics follow these guidelines Log in to the device th...

Page 7: ...0101 000704 tar gz Extracting archive flash diag_Sysname_20160101 000704 tar gz Done Sysname gunzip diag_Sysname_20160101 000704 gz Decompressing file flash diag_Sysname_20160101 000704 gz Done 4 Disp...

Page 8: ...switch is correct Connect to the switch through the console port and restart the switch If BootWare reports that a CRC error has occurred or that no system software image is available perform the foll...

Page 9: ...not have power input 3 If the power module is in Absent state no power module is in the slot or the power module is not installed securely in the slot If the power module is in the slot but its statu...

Page 10: ...tage protection mode Off The power module does not have power input 3 If the power module is in Absent state and the status LED on the power module is flashing green connected to power or off not conn...

Page 11: ...fy that the fan tray has changed to Normal state If the fan tray remains in Absent state replace the fan tray 3 Observe the alarm LED on the fan tray If the alarm LED is on the fan tray is operating i...

Page 12: ...configuration files and system software images display environment Displays temperature information display fan Displays the operating states of the fan tray display logbuffer Displays the state of t...

Page 13: ...nt hardware resource for ACLs Solution To resolve the issue 1 Execute display qos acl resource command to view ACL resource usage information Sysname display qos acl resource Interfaces WGE1 0 1 to WG...

Page 14: ...EFP Meter 1024 0 0 1024 0 EFP Counter 1024 0 0 1024 0 IFP indicates ACL resources for the inbound traffic EFP indicates ACL resources for the outbound traffic 2 If the resources required for applying...

Page 15: ...ip source 2 2 2 2 0 0 255 255 rule 1 deny ip destination 3 3 3 3 0 0 255 255 Packets with source IP 2 2 2 2 and destination IP 3 3 3 3 will match only rule 0 and do not match rule 1 For information a...

Page 16: ...3100 and rule 0 in ACL 3009 can both match traffic sourced from 2 2 2 2 ACL number 3100 rule 0 permit ip source 2 2 2 2 0 0 255 255 ACL number 3009 rule 0 permit ip source 2 2 2 2 0 0 0 255 3 Remove t...

Page 17: ...es can establish an IRF fabric with switches in the S6850 switch series and S9850 switch series S9850 switches can establish an IRF fabric with switches in the S9850 switch series and S6850 switch ser...

Page 18: ...modules or cables used Resolved No Yes Yes No Bring up the IRF links or activate IRF port configuration Resolved Yes No No Yes IRF links up Are two ends of an IRF link operating at the same rate Reso...

Page 19: ...rs you must connect the physical interfaces of IRF port 1 on one member to the physical interfaces of IRF port 2 on the other 4 Verify that the correct transceiver modules and cables are used To conne...

Page 20: ...you execute the irf port configuration active command 7 Verify that all member devices use the same software version a Execute the display version command to identify the software version of each mem...

Page 21: ...bound to the IRF ports on each IRF member device The new member IDs take effect at reboot display irf link Displays IRF link information Use this command to verify that each IRF port has a minimum of...

Page 22: ...ation This section provides troubleshooting information for common issues with Ethernet link aggregation Link aggregation failure Symptom Some member ports fail to be placed in Selected state and link...

Page 23: ...ectly Bring all member ports up No Yes No Yes Operational key attribute configurations same as the reference port Set operational key attribute configurations same as the reference port No Yes Set the...

Page 24: ...regation group does not exceed the configured maximum number of Selected ports a Execute the link aggregation selected port maximum command to set the maximum number of Selected ports allowed in the a...

Page 25: ...l and peer ports Speed duplex match on transceiver module cable and port Configure matching duplex speed Resolved Configure matching duplex speed A fiber port fails to come up No Yes No Yes Resolved N...

Page 26: ...e port can come up you can determine that the peer port fails Replace the peer port with a new port operating correctly If the port cannot come up you can determine that the local port fails Replace t...

Page 27: ...atching duplex speed Resolved Configure matching duplex speed A 25 GE SFP28 fiber port fails to come up No Yes No Yes Resolved No Yes Yes No Transceiver module cable correct Replace transceiver module...

Page 28: ...fault for the port and the other ports in the group 25 GE ports on the S6850 S9850 switches are grouped as follows For ports 1 through 24 and 33 through 56 on an S6850 56HF switch four continuous port...

Page 29: ...end If the port operates at 10 Gbps use an SFP cable used for short haul connection to directly connect it to another 10 GE port on the local end b Identify whether the port can come up If the port c...

Page 30: ...ex mode of the port match the speed and duplex mode of the peer port b If they do not match use the speed command and the duplex command to set the rate and duplex mode for the port 2 Replace the netw...

Page 31: ...ver module error message Solution To resolve the issue 1 Verify that the transceiver module is an H3C transceiver module Execute the display transceiver interface command to view the vendor name of th...

Page 32: ...hows that the transceiver module does not support the digital diagnosis function Sysname display transceiver diagnosis interface twenty fivegige 1 0 1 The transceiver does not support this function Tr...

Page 33: ...dule information and contact H3C Support to verify that the transceiver module supports the digital diagnosis function Sysname display transceiver interface twenty fivegige 1 0 1 Twenty FiveGigE 1 0 1...

Page 34: ...he display transceiver diagnosis interface command to view the present measured values of the digital diagnosis parameters for the transceiver module Sysname display transceiver diagnosis interface tw...

Page 35: ...he link medium 5 Verify that the port is operating correctly If the port is a copper port connect the port directly to a PC If the port is a fiber port replace the transceiver module in the port If er...

Page 36: ...rify that the port configurations do not affect packet receiving a Use the display interface brief command to verify that the port configurations are correct The port configurations include the duplex...

Page 37: ...to the port is operating correctly Plug the link medium into a new port that is operating correctly If the new port cannot receive packets replace the link medium 5 Verify that the port is operating...

Page 38: ...ing tree feature examine and modify the spanning tree feature configurations to resolve the issue As a best practice configure the port as an edge port or disable the spanning tree feature on the port...

Page 39: ...the log information in the log buffer display stp brief Displays brief spanning tree status and statistics display transceiver alarm interface Displays the current transceiver module alarms display t...

Page 40: ...GP or IBGP neighbor relationship setup failure Solution To resolve the issue 1 Verify that BGP is correctly configured BGP settings correct Yes Yes No Modify BGP settings End Yes No BGP neighbor relat...

Page 41: ...t 10 minutes c If the memory usage stays above the critical alarm threshold contact Hewlett Packard Enterprise Support 4 Perform the following tasks to collect information and contact Hewlett Packard...

Page 42: ...ave the same community attributes and extended community attributes Only one route to the destination network No Yes No ECMP routes exist End No Yes ECMP forwarding failure Route community attributes...

Page 43: ...one of the routes that have the same prefix has the optimal sign execute the display current configuration configuration bgp command to verify that the balance command has been executed in BGP VPN IPv...

Page 44: ...for common system management issues High CPU utilization Symptom The sustained CPU utilization of the device is over 80 Troubleshooting flowchart Figure 16 Troubleshooting high CPU utilization Solutio...

Page 45: ...0 0 0 0 0 watchdog 5 21 0 0 0 0 0 0 migration 6 More The output shows the average CPU usage values of jobs for the last 5 seconds 1 minute and 5 minutes Typically the average CPU usage of a job is le...

Page 46: ...hread 0x130 0x140 8021d730 kernel_thread_helper 0x10 0x20 3 Save the information displayed in the previous steps 4 Contact Hewlett Packard Enterprise Support High memory utilization Symptom The memory...

Page 47: ...0 26 1 1 1 ADJ4_Ext_Cachep 0 0 48 0 46 1 0 0 L2VFIB_LpwEntryCacheName 1 More Each value line shows the memory information for a slab The Number field shows the number of objects memory blocks allocate...

Page 48: ...wchart Figure 18 Troubleshooting Layer 2 packet loss failure Incoming error packets No Yes Yes Troubleshoot the problem End No Yes Layer 2 packet loss Packets filtered by ACLs or QoS policies Troubles...

Page 49: ...r Interface hardware failure To test such a failure connect the cable that is connected to the local port to a correctly operating port for example Port A with the same configurations as the local por...

Page 50: ...b 16 down 0 WGE1 0 12 0 34 xe10 no no 0xc 16 down 0 WGE1 0 13 0 43 xe15 no no 0xd 16 down 0 WGE1 0 14 0 44 xe16 no no 0xe 16 down 0 WGE1 0 15 0 41 xe13 no no 0xf 16 down 0 WGE1 0 16 0 42 xe14 no no 0x...

Page 51: ...o 0x43 16 down 1 WGE1 0 36 0 72 xe26 no no 0x44 16 down 1 WGE1 0 37 0 81 xe32 no no 0x45 16 down 1 WGE1 0 38 0 82 xe33 no no 0x46 16 down 1 WGE1 0 39 0 79 xe30 no no 0x47 16 down 1 WGE1 0 40 0 80 xe31...

Page 52: ...ecution of the command To view the change in dropped packet statistics execute the command twice or more Sysname probe bcm slot 1 chip 0 show c xe3 RDBGC2 xe0 8 118 8 118 R511 xe0 8 118 8 118 RPKT xe0...

Page 53: ...n Unselected state For example the attribute configurations of the port are different from the configurations of the reference port Identify whether the port is blocked by smart link Use the display s...

Page 54: ...en successfully applied to an interface for packet filtering display portal interface Displays portal configuration and portal running state on an interface display qos lr interface Displays the rate...

Page 55: ...ntries and ARP entries are the same If the output interfaces are different execute the reset arp command to clear the ARP entries Then the switch can learn ARP entries again 3 Verify that ND entries a...

Page 56: ...ecute the reset command to clear the route entries Then the switch can learn route entries again 5 If the issue persists contact Hewlett Packard Enterprise Support Related commands This section lists...

Page 57: ...RRP 0 0 0 0 2000 S On SMAC 8 5 UNKNOWN_IPV4MC 0 0 0 0 600 S On SMAC 8 6 UNKNOWN_IPV6MC 0 0 0 0 600 S On SMAC 8 7 IPV4_MC_RIP 0 0 0 0 1000 D On SMAC 8 8 IPV4_BC_RIP 0 0 0 0 1000 D On SMAC 8 The DisPkt_...

Page 58: ...55 When you contact Hewlett Packard Enterprise Support provide diagnostic information if software related packet loss occurred...

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