Strange Cox issues in California

I haven't been able to reach anyone with clue at Cox to resolve this,
but over the last two days we have seen breakage of applications
requiring UDP reported by Cox cable modem customers. ICMP ping also
fails but web surfing works. Was a huge problem yesterday, came back
for some customers but some are still affected. Most of our affected
customers are in Santa Barbara.

SIP and VPN customers are the most obviously affected.