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nslookup, Lookup both IPv4 and IPv6 addresses.

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NETGEAR 8800 Chassis Switch CLI Manual technical support, or when advanced diagnosis is required. The debug mode setting is saved to FLASH. The following configuration options require that debug mode be enabled: • Including a severity of debug-summary, debug-verbose, or debug-data when configuring filters • Target format options process-name, process-id, source-function, and source-line Example The following command enables debug mode: enable log debug-mode When you enable debug mode, the following message appears: WARNING: Debug mode should only be enabled when advised by technical support, or when advanced diagnosis is required. Performance degradation is possible. Debug mode now enabled. nslookup nslookup {IPv4 | IPv6} Description Displays the IP address of the requested host. Syntax Description IPv4 IPV6 host-name Lookup only IPv4 address(es) Lookup only IPv6 address(es) Specifies the hostname. Default Lookup both IPv4 and IPv6 addresses. Usage Guidelines For nslookup to work, you must configure the DNS client, and the switch must be able to reach the DNS server. By default, the command looks for both IPv4 and IPv6 addresses and reports an error only when neither an IPv4 address nor an IPv6 address is found for the host. If the IPv4 or IPv6 option is specified, DNS lookup happens only for that address type, and an error is reported when no address of that type is found. Appendix B. Troubleshooting Commands | 1351

Section	Page
NETGEAR 8800 Chassis Switch CLI Manual	1
Contents	3
1. Command Reference Overview	6
Introduction	6
Audience	6
Structure of this Guide	7
Understanding the Command Syntax	7
Access Levels	7
Syntax Symbols	8
Syntax Helper	8
Object Names	9
Command Shortcuts	10
Port Numbering	10
Numerical Ranges	10
Line-Editing Keys	11
Command History	12
2. Commands for Accessing the Switch	13
3. Commands for Managing the Switch	57
SNMP	57
Telnet	58
TFTP	58
System Redundancy with Dual Management Modules Installed	58
Power Supply Management	58
Simple Network Time Protocol	59
4. Commands for Managing the NETGEAR 8800 Software	157
5. Commands for Configuring Slots and Ports on a Switch	190
6. Commands for Configuring LLDP	269
7. PoE Commands	300
Summary of PoE Software Features	300
8. Commands for Status Monitoring and Statistics	330
Event Management System	330
sFlow Statistics	331
RMON	331
9. VLAN Commands	425
10. FDB Commands	453
11. Commands for Virtual Routers	472
12. Policy Manager Commands	481
13. ACL Commands	487
14. QoS Commands	520
15. Security Commands	554
SSH	554
SSL	554
User Authentication	554
Denial of Service	555
16. Network Login Commands	679
17. STP Commands	737
STP	737
RSTP	737
MSTP	738
Spanning Tree Domains	738
Member VLANs	738
Carrier VLAN	738
Protected VLAN	739
STPD Modes	739
Encapsulation Modes	740
STP Rules and Restrictions	741
18. VRRP Commands	793
19. IP Unicast Commands	814
20. IPv6 Unicast Commands	904
21. RIP Commands	950
22. RIPng Commands	973
23. OSPF Commands	994
OSPF Edge Mode	995
24. OSPFv3 Commands	1036
OSPF Edge Mode	1037
25. BGP Commands	1075
26. IP Multicast Commands	1163
27. IPv6 Multicast Commands	1242
28. MSDP Commands	1261
29. vMAN (PBN) Commands	1296
A. Configuration and Image Commands	1306
B. Troubleshooting Commands	1345
Event Management System	1345