05-22-2019 07:38 AM
Im receiving these errors every few minutes for a week until the switch locks up and i have to reboot.
%DHCPV6CLIENT-E-ILLGLOPTNLEN: Illegal option length: option is 24, length is 0, aggregated (4)
05-22-2019 09:28 AM
Hello Jason,
option 24 refers to DNS domain list
see RFC 3646
https://tools.ietf.org/html/rfc3646
The format of the Domain Search List option is: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | OPTION_DOMAIN_LIST | option-len | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | searchlist | | ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ option-code: OPTION_DOMAIN_LIST (24) option-len: Length of the 'searchlist' field in octets searchlist: The specification of the list of domain names in the Domain Search List The list of domain names in the 'searchlist' MUST be encoded as specified in section "Representation and use of domain names" of RFC 3315.
You should try to understand if any client is sending this offending packet to your switch.
Hope to help
Giuseppe
05-22-2019 11:53 AM
Its my Motorola cable modem.
12-23-2023 11:40 PM
So what was done to fix this? I'm getting this on my CBS350-16P-2G.
12-24-2023 01:29 AM
Open a new post with the logs you seeing on the device.
better to upgrade to latest firmware that fixed all the issues.
are you using any DHCPv6 ? if not try disable any where in the configuration ?
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