Andrew Zonenberg@azonenberg@ioc.exchange
@ariadne@social.treehouse.systems @astraleureka@social.treehouse.systems @lina@vt.social Sadly not rare.
my last dhcpv6-pd issue (comcast business):
1) you must request your static /56 as many separate /59 delegations, it will refuse to delegate anything larger in one go
2) you must enable IPv4 DHCP on the CPE. Doesn't matter that your router is on a static ip, or that you will not actually ever issue a DHCPDISCOVER. If the DHCPv4 service isn't running, it'll send you DHCPv6 messages claiming to have delegated your prefix but not actually update the routing table on the CPE and your prefix won't route anywhere
equi@equinox@chaos.social
@azonenberg@ioc.exchange @ariadne@social.treehouse.systems @astraleureka@social.treehouse.systems @lina@vt.social it could be WAY worse:
when I got my fiber connection, I found for some reason it worked on OpenWRT but not my Debian box. After some digging, it turned out all DHCPv6 packets were 1514 byte Ethernet frames, regardless of IPv6/UDP content len.
Those extra bytes were a bug on the last-hop Cisco switches' DHCPv6 relay/inspection. Random snippets out of the switch's memory.
Including configs.
With other customer's names and line IDs (port descriptions)