Cable Guy: PMTU Black Hole Routers

On the topic of Cable Guys articles - there’s a new one for July… From Joes Blog:

The July 2004 TechNet Cable Guy article is titled “Path Maximum Transmission Unit (PMTU) Black Hole Routers” and describes TCP connection problems caused by PMTU black hole routers (that silently discard packets that must be fragmented for which the Don’t Fragment flag is set) and some workarounds. This is a common support problem in enterprise and Internet networking

Click here for the article.