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Bug #13423

closed

IPv6 neighbor discovery protocol (NDP) fails in some cases

Added by Chris Linstruth almost 2 years ago. Updated 7 months ago.

Status:
Resolved
Priority:
Normal
Category:
IPv6 Router Advertisements (radvd/rtsold)
Target version:
Start date:
Due date:
% Done:

100%

Estimated time:
Plus Target Version:
23.09
Release Notes:
Default
Affected Version:
Affected Architecture:

Description

This is proving fairly difficult to pin down a set of "steps to duplicate." In some cases an IPv6 interface seems to ignore received Neighbor Solicitation packets for an address on that interface and not respond.

If traffic is generated from this non-responding host, causing NDP to be performed in the other direction, communication is possible until the NDP entry expires. Connections are then impossible if originated from the other host.

This looks to be something in FreeBSD upstream.


Files

packetcapture-NDP-13423.cap (3.91 KB) packetcapture-NDP-13423.cap Chris Linstruth, 12/07/2022 08:48 AM

Related issues

Related to Bug #13555: When WAN is lost, ipv6 interface will not renew upon WAN availabilityDuplicate

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