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H3C SOHO Switch Troubleshooting Guide
(Comware V5 )
Copyright © 2018 New H3C Technologies Co., Ltd. All rights reserved.
No 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., any trademarks that may be mentioned in this document are
the property of their respective owners.
The information in this document is subject to change without notice.
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Table of Contents
Troubleshooting
Related Manuals for H3C SOHO Series
Summary of Contents for H3C SOHO Series
- Page 1 No 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., any trademarks that may be mentioned in this document are the property of their respective owners.
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Page 2: Table Of Contents
Contents Introduction ····················································································· 1 Troubleshooting ACLs ······································································· 1 ACL deployment failure ··············································································································· 1 Symptom ··························································································································· 1 Troubleshooting flowchart ····································································································· 2 Solution ····························································································································· 2 Related commands ···················································································································· 3 Troubleshooting link aggregation ························································· 3 ... -
Page 3: Introduction
Introduction This document provides information about troubleshooting common software and hardware issues with H3C Comware 5 SOHO switches. This document is not restricted to specific software versions. The H3C SOHO switches include the following models: • S2100. • S2600. •... -
Page 4: Troubleshooting Flowchart
Troubleshooting flowchart Figure 1 Flowchart for troubleshooting ACL deployment failure ACL deployment failure Address resource Hardware resources Failure cleared? insufficiency insufficient? Configure packet Failure cleared? filter correctly Is packet filter Is ACL deployed via configured correctly? a QoS policy? Is QoS policy Configure QoS Failure cleared? configured correctly? -
Page 5: Related Commands
Use the display acl command to check whether the ACL rule configuration is correct. If yes, go to step 5. If not, correct the configuration. If the issue persists, contact H3C Support. Related commands This section lists the commands that you might use for troubleshooting ACLs. -
Page 6: Troubleshooting Flowchart
Troubleshooting flowchart Figure 2 Flowchart for troubleshooting a link aggregation failure Link aggregation failed Connect physical links Physical connections Resolved? correctly correct? Bring up down member ports All member ports up? Resolved? Attribute/class-two Modify attribute/class-two configuration of member ports same as Resolved? configuration of member ports reference port? -
Page 7: Related Commands
Verify that the number of member ports in the aggregation group does not exceed eight. If the limit is exceeded, remove undesired member ports from the aggregation group. If the issue persists, contact H3C Support. Related commands This section lists the commands that you might use for troubleshooting link aggregation. -
Page 8: Troubleshooting Flowchart
Troubleshooting flowchart Figure 3 Troubleshooting a port's failure to come up A port failed to come up Port connection Check port connection Resolved? Port is shut Execute undo shutdown Resolved? down? command to bring up the port Make speed and Speed/duplex matches duplex match on local Resolved? -
Page 9: Related Commands
GigabitEthernet1/0/2: link status is UP %Apr 26 12:40:25:531 2000 60CPWR IFNET/4/LINK UPDOWN: GigabitEthernet1/0/2: link status is DOWN Loop internal succeeded! If the issue persists, contact H3C Support. Related commands This section lists the commands that you might use for troubleshooting ports. Command... -
Page 10: Miscellaneous
Miscellaneous 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 4 Troubleshooting Layer 2 forwarding failure Layer 2 packet loss Troubleshoot the Incoming error packets? Resolved? -
Page 11: Solution
If they are inconsistent, modify the configurations of the local port. c. If the problem persists, contact H3C Support. Verify that packets are not mistakenly discarded by ACLs: a. Examine the ACL and QoS policy settings used for packet filtering on the port, on the VLAN of the port, or globally. -
Page 12: Related Commands
If congestion occurs, locate and resolve the problem by referencing related congestion management documents. If the issue persists, contact H3C Support. Related commands This section lists the commands that you might use for troubleshooting Layer 2 forwarding failure. -
Page 13: Layer 3 Packet Forwarding Failure
Command Description Displays the rate limit configuration and statistics on a display qos lr interface specified interface or all the interfaces. display qos policy Displays user-defined QoS policy configuration information. display qos policy global Displays information about global QoS policies. Displays information about the QoS policies applied to an display qos policy interface interface or all interfaces. -
Page 14: Related Commands
If the number of route entries has reached the upper limit of the hardware resources, exceeding route entries are not used for Layer 3 forwarding. If the issue persists, contact H3C Support. Related commands This section lists the commands that you might use for troubleshooting Layer 3 packet forwarding failure. -
Page 15: 1000-Mbps Sfp Fiber Port Fails To Come Up
Remove and install the transceiver modules again and again to trigger the device to identify the transceiver modules. Make sure the transceiver modules are compatible with the devices. If the issue persists, use the display diagnostic-information command to save the operating statistics for multiple feature modules. If the issue persists, contact H3C Support. -
Page 16: Related Commands
Related commands This section lists the commands that you might use for troubleshooting system management. Command Description Activates the fiber combo port. In this case, use optical fibers combo enable fiber to connect the port. Displays or saves the operating statistics for multiple feature display diagnostic-information modules. - Page 17 b. Execute the poe update command to upgrade the PSE software. <Sysname> system-view [Sysname] poe update full ver_3_9_0_release.bin This command will fully update firmware on the specific PSE(s), Continue? [Y/N]:y System is downloading firmware into the hardware. Please wait ....Update firmware on the specific PSE(s) successfully! The output shows that the PSE software is upgraded successfully.
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Page 18: Related Commands
If this issue persists, contact H3C Support. Related commands This section lists the commands that you might use for troubleshooting PoE.
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