Re: v6 subnet size for DSL leased line customers

2007-12-26 Thread Joe Greco
If the ops community doesn't provide enough addresses and a way to use them then the vendors will do the same thing they did in v4. It's not clear to me where their needs don't coincide in this case. there are three legs to the tripod network operator user equipment

Re: v6 subnet size for DSL leased line customers

2007-12-26 Thread Leo Bicknell
In a message written on Tue, Dec 25, 2007 at 12:43:45AM -0500, Kevin Loch wrote: RA is a shotgun. All hosts on a segment get the same gateway. I have no idea what a host on multiple segments with different gateways would do. Hosting environments can get complex thanks to customer I would

Re: v6 subnet size for DSL leased line customers

2007-12-26 Thread Florian Weimer
* Leo Bicknell: In a message written on Tue, Dec 25, 2007 at 12:43:45AM -0500, Kevin Loch wrote: RA is a shotgun. All hosts on a segment get the same gateway. I have no idea what a host on multiple segments with different gateways would do. Hosting environments can get complex thanks

Re: v6 subnet size for DSL leased line customers

2007-12-26 Thread Florian Weimer
* Tim Durack: Probably why some vendors support dhcp snooping and private vlans for IPv4 - multiple clients per subnet with isolation. The isolation is far from perfect because you don't know from which host the packet actually came. 8-(

Re: v6 subnet size for DSL leased line customers

2007-12-26 Thread Tony Li
On Dec 26, 2007, at 8:26 AM, Leo Bicknell wrote: In a message written on Tue, Dec 25, 2007 at 12:43:45AM -0500, Kevin Loch wrote: RA is a shotgun. All hosts on a segment get the same gateway. I have no idea what a host on multiple segments with different gateways would do. Hosting

Re: v6 subnet size for DSL leased line customers

2007-12-26 Thread Iljitsch van Beijnum
On 26 dec 2007, at 19:22, Tony Li wrote: This doesn't resolve the real underlying problem: Ethernet is inherently insecure. MAC addresses can be forged, protocols (ARP, ND) can be forged and at this point, there's not much that we can do about it. Architecturally, we need authentication

Re: v6 subnet size for DSL leased line customers

2007-12-26 Thread Joe Maimon
Tony Li wrote: On Dec 26, 2007, at 8:26 AM, Leo Bicknell wrote: It's unlikely that it will matter. In practice, ICMP router discovery died a long time ago, thanks to neglect. Host vendors didn't adopt it, and it languished. The problem eventually got solved with HSRP and its

Re: v6 subnet size for DSL leased line customers

2007-12-26 Thread Leo Bicknell
In a message written on Wed, Dec 26, 2007 at 09:19:54PM +0100, Iljitsch van Beijnum wrote: Many switches can enforce a MAC/port relationship, so that MAC addresses can't be spoofed. Which gets to the crux of my question. If you're a shop that uses such features today (MAC/Port tracking,

Re: v6 subnet size for DSL leased line customers

2007-12-26 Thread Randy Bush
vendors, like everyone else, will do what is in their best interests. as i am an operator, not a vendor, that is often not what is in my best interest, marketing literature aside. i believe it benefits the ops community to be honest when the two do not seem to coincide. If the ops community