Cisco Nexus 5000 Series - Page 6

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Cisco Nexus 5000 Series Troubleshooting Guide
OL-25300-01
Chapter 1 Troubleshooting System Management Issues
Traps
Traps
Traps not received
The results of traps are not received.
Possible Cause
The traps might not be enabled or the SNMP host might not be accessible.
The following are possible causes:
• Traps might not be enabled.
• The SNMP host might not be accessible.
• A firewall might be blocking access.
• An access list might be blocking UDP port 162.
Solution
Use the following commands to check whether the proper VRF is configured for the SNMP host and that
the trap is enabled:
• snmp-server enable traps <trapname>
• snmp-server host <x.x.x.x> use-vrf <vrf-name>
where x.x.x.x is the IP address of the trap receiving device.
DNS
DNS resolution not working correctly
When specifying a host name using DNS or VRF, the host name is not resolved and an error occurs.
Possible Cause
The DNS client is not configured correctly.
Solution
Use the following commands to configure the DNS client:
• config t
• vrf context management
• ip host name <address1 [address2... address6]>
• ip domain-name name [use-vrf <vrf-name>]
• ip domain-list name [use-vrf <vrf-name>]
• ip name-server <server-address1 [server-address2... server-address6]>< [use-vrf vrf-name>]
• ip domain lookup
• show hosts
• copy running-config startup-config