Hi Mark, If you have a glean pointing out an interface, then you have an ipv6 address on that interface. The presence of an address will ipv6 enable the interface, so you don’t need that command as well.
Your errors are not necessarily signs of a bad config, but an indication that a host on that link is unreachable. /neale From: mark antony <mark.antonnyy.1...@gmail.com> Date: Thursday, 23 September 2021 at 12:12 To: Neale Ranns <ne...@graphiant.com> Cc: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> Subject: Re: [vpp-dev] getting ip6-glean:address overflow drops Hi neale, Thanks for the info, is enabling ipv6 on interface with "enable ip6 interface" command is necessary? I saw before without it i could ping in a very simple ipv6 scenario but can enabling ipv6 on interfaces help this address overflow errors? Best regards, Mark On Thu, Sep 23, 2021, 12:45 Neale Ranns <ne...@graphiant.com<mailto:ne...@graphiant.com>> wrote: Hi Mark, If traffic matches a ipv6-glean then it is destined to a host on an attached subnet that does not yet have an ND entry. Matching the glean will generate an ND solicitation to that host, but these are rate limited. An address overflow can happen when: 1. when the rate limiting kicks in. 2. the egress link is down 3. some other reasons but I doubt that’s the case here: see src/vnet/ip-neoghbor/ip6_neighbor.c:202 for details. /neale From: vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> <vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>> on behalf of mark antony via lists.fd.io<http://lists.fd.io> <mark.antonnyy.1984=gmail....@lists.fd.io<mailto:gmail....@lists.fd.io>> Date: Wednesday, 22 September 2021 at 18:05 To: vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> <vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>> Subject: [vpp-dev] getting ip6-glean:address overflow drops Hi all, I get about 5 million packet drops due to ip6-glean: address overflow drops. I attached my "vppctl sh error" command result. I am sure about my configuration. What could be the possible reasons for this error? thanks, mark
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