Hi all - I apoligize for the not-necessarily-on-topic post, but I've been 
struggling with this issue for the past two
weeks and am about out of ideas and options other than ask here.

The short version is I recently got FIOS at my (new) house, and plugged in my 
router (SFF PC running Vyos). Initially,
all was fine, however, some time later, connectivity to the gateway given by 
the DHCP server is completely lost. If I
force a renewal, the gateway (sometimes) comes back--sometimes not. When it 
doesn't work, the DHCPDISCOVER process has
to start over again and I often recive a lease in a completely different 
subnet--which isn't really the problem, but
seems to be symptomatic of whatever is happening upstream of me.

The problem, from my perspective, is that the IPv4 gateway given to me in my 
DHCP lease goes away before my lease
expires--leading to broken v4 connectivity until either 1. the system goes to 
renew the lease and fails, starting over;
or 2. A watchdog notices and renews the lease (This is what I have attempted to 
implement, without much success).

As a note, IPv6 connectivity (dhcpv6-pd, receiving a /56) is entirely 
unaffected when IPv4 connectivity breaks.

For the past week, I have been monitoring to various IPv4 and IPv6 endpoints 
over ICMP and TCP, and have been able to
chart the outages over that period. More or less, every two hours, shortly 
after a lease is renewed, the gateway
disappears. I'm happy to share more details and graphs/logs with anyone who 
might be able to help.

I have attempted to contact FIOS support several times and even had a trouble 
ticket opened at one point--though this
has been closed as they cannot apparently find any issue with the ONT.

I'm at my wit's end with this issue and would really appreciate any and all 
help. Please contact me off list if you need
additional details--I can provide ticket numbers/conversation IDs/etc, as well 
as graphs/logs/etc.

Best,
Neil Hanlon

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