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computers / comp.os.linux.networking / ndisc6 doesn't recognize IPv6 router anycast neighbor advertisement

ndisc6 doesn't recognize IPv6 router anycast neighbor advertisement

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From: mo01@posteo.de (Marco Moock)
Newsgroups: comp.os.linux.networking
Subject: ndisc6 doesn't recognize IPv6 router anycast neighbor
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Date: Tue, 10 Jan 2023 09:34:55 +0100
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by: Marco Moock - Tue, 10 Jan 2023 08:34 UTC

Hello,

can anybody here test at home/work if ndisc6 recognizes the ICMPv6
neighbor advertisement for a subnet router anycast address?
That is the first address in a subnet, e.g. for 2001:db8:1234:456::/64
it is 2001:db8:1234:456::.

ndisc6 2001:db8:1234:456:: eth0
ndisc6 fe80:: enp6s1

fe80:: should work with any router that has IPv6 enabled.

At my side (Cisco router), ndisc6 shows a timeout, but can recognize
normal neighbor advertisements to unicast addresses.
My router sends the neighbor advertisement for the router subnet
anycast address, I verified that with Wireshark.

--
kind regards
Marco

Subject	Author
ndisc6 doesn't recognize IPv6 router anycast neighbor	Marco Moock