Troubleshooting
Problem
The traceroute and nslookup commands are failing.
Here is an example of the traceroute command and error message:
# traceroute 10.10.1.5
trying to get source for 10.10.1.5
UDP connect: Resource temporarily unavailable
Symptom
When you run the traceroute or nslookup command, it can return the errors shown:
Example:
Example:
# traceroute 10.10.1.5
trying to get source for 10.10.1.5
UDP connect: Resource temporarily unavailable
Example:
# nslookup hostname
Can't find server name for address 1.1.1.1:No response from server
Can't find server name for address 1.1.1.1:No response from server
Cause
The reason for the errors can be a shortage of UDP ephemeral ports.
Diagnosing The Problem
List ephemeral ports range.
# no -a| grep ephemeral
tcp_ephemeral_high = 65535
tcp_ephemeral_low = 32768
udp_ephemeral_high = 32800
udp_ephemeral_low = 32768
Resolving The Problem
Increase the upper limit of UDP port range by running the command below:
# no -p -o udp_ephemeral_high=65535
[{"Type":"MASTER","Line of Business":{"code":"LOB08","label":"Cognitive Systems"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SWG10","label":"AIX"},"ARM Category":[{"code":"a8m0z000000cvxRAAQ","label":"Communication Applications-\u003ENETWORKING COMMANDS\/FILES"}],"ARM Case Number":"","Platform":[{"code":"PF002","label":"AIX"}],"Version":"All Versions"}]
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Document Information
Modified date:
08 July 2022
UID
isg3T1012845