Edward B. DREGER
eddy+public+spam at noc.everquick.net
Wed Mar 29 07:35:25 UTC 2006
B> Date: Tue, 28 Mar 2006 23:45:58 -0500
B> From: Brad
B> Yes, 2 redundant paths represented by a virtual L2 interface is what he is
B> asking for. VRRP is for providing L3 redundancy for the next hop. A completely
B> different scenario.
I hesitate to speak for others, but I'm pretty confident RAS knows that.
B> > A properly designed system should be seperating out these layers
B> > internally, in order to tie all of these features together under a common
B> I'm not sure what exactly it is that you're describing above. It almost sounds
B> as if you want a flat config with no config information split up by interfaces
B> be it physical, virtual L2 or virtual L3. I can't say as I've seen *any*
B> OS that can do that *exactly* as you describe.
Sounds to me like a request for something analogous to netgraph(4),
busdma(9), or scsipi(9). (A local attempt to integrate some custom FIB
code in 4.x led me through some rather messy code. IIRC, I found
several opportunities for better abstraction and lower cyclomatic code
complexity. Perhaps memory fails me, or maybe things have changed.)
B> trunking = 801.Q/ISL and nothing else.
The IEEE has results from their "802.3 Trunking Study Group" available.
If the body that writes the standard uses "802.3" and "trunking"
together, I can see why others might do the same.
B> link aggregation implies that all links are active. this is FAILOVER. there is
B> no hash involved.
[ Note: I didn't quite follow your pronoun/antecedent usage. ]
There normally _is_ hashing involved with link aggregation. It's not
part of the 802.3ad protocol per se, but devices spread traffic across
the active links. Straight L2 devices hash on src/dst MAC addr. More
intelligent counterparts inspect higher layers when selecting a link.
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