When using IPv6, why does the message "Neighbour table overflow" in /var/log/messages appear frequently when using TPROXY?
Issue
- When using TPROXY, a transparent proxy tool and IPv6 in conjunction there are multiple references of this kernel message in /var/log/messages:
2012-11-01T11:52:26.991773-07:00 system kernel: [161634.116941] Neighbour table overflow.
2012-11-01T11:52:31.991635-07:00 system kernel: [161639.109391] __ratelimit: 67475 callbacks suppressed
2012-11-01T11:52:31.991664-07:00 system kernel: [161639.109395] Neighbour table overflow.
2012-11-01T11:52:31.991667-07:00 system kernel: [161639.109435] Neighbour table overflow.
- Furthermore, when these messages appear poor network performance occurs.
Environment
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.
Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.
