On Sun, 2002-09-01 at 00:45, K a z wrote: > > Hello LEAF users, > > We are going to be getting a full 100mbit line dropped to us in a colocation > facility. We plan to resell part of this bandwidth to about about 20 > dedicated and colocated clients. I am trying to come up with a cheap, > effective & easy solution to serve these clients AND manage/throttle/cap > their bandwidth consumption. > > I have been administrating my own (FreeBSD) boxes for about 7 years now, so > I know my way around unix a bit. However, I have never been faced with > networking at this level, and don't really know about RIP and the various > bandwidth management options available. > > So far here is what I came up with: > > Solution #1 CISCO Layer3 Switch ~$2500: > > CISCO Catalyst WS-C2948G-L3 Layer 3 Switch. > It Does RIP, does ACL rate-limiting for (crude?) bw management. > Seems like a single-appliance solution -- price $2000-$3000 Ugh. >
A layer three switch like this can implement routing decisions, but it cannot make them. You'll still need a router-on-a-stick or upstream of it to finish doing this the Cisco way. A 2600 is not capable of routing 100Mbits, but a 3600 should handle it (last I checked the 3660 was the smallest router with a 100Mbit backplane, but that was some years ago). A slower router would only impact your speed after a switch reboot any way, *if* it was on a stick -- in-line would of course slow everything down. Switches operate at Layer 2, making their decisions by reviewing MAC addresses and building a table of switch decisions (similar to a routing table). Layer 3 switching allows the switch to �be aware� of Layer 3 addressing, which makes cross-subnet traffic significantly faster, because all packets do not need to pass through a relatively slow router. When routing decisions are required, the traffic is sent up to the router. However, the switch watches where the router sends the traffic to, and takes note. The rest of the traffic in that session (from the one Layer 3 address to the other and back) will be switched at Layer 2, without crossing the router�s physical interface at all. > Solution #2 ETINC software + Switch ~$1500: > > Banwidth Management software from www.etinc.com > (applied on one of my boxes). I _think_ I could run > that box as a router still... then all I would need > would be a good 24-48 port switch (could someone recommend?). > Price?... $700 for the software, ~$300 for the box, another > $500 for the switch? (maybe thats too much).. Total ~$1500.00. The above switch would do the job. A Cat -EN should be able to do it for somewhat less money. > > Solution #3 -- LEAF + Switch = ~$800 (or less!): > > Could leaf handle this on a good box? All I would need then > would be a good switch right? > The issue is PCI bus bandwidth. You should be able to pull it off or come quite close with good bus-mastering NICs (think Intel server-class stuff) in a fast motherboard. > > Keep in mind, it is a FULL 100mbit line - and we will be paying > for the bandwidth. If we aren't getting "full wire speed" or > whatever.. its probably because of some hardware bottleneck or > something somewhere. So I sort of wanted to use good hardware - > or at least a solution that would be compareable to the CISCO > router. > Cisco's ACL bandwidth management (CAR) is rather primitive -- it allows burst up to ceiling, then knocks the speed back down for a period of time, producing a very spiky graph that is not so good for multimedia or interactive applications. LEAF's QoS should be better, which functions more like WFQ in Cisco. There are some docs (a bit dated) at http://www.monkeynoodle.org/lrp/ that might help -- QoS and Why specifically. One other thing -- RIP is an abomination. If you want to run a routing protocol, you should check out zebra for a OSPF implementation. In a network this simple, I don't see any need for a routing protocol at all though. > Thanks for reading, > > Kaz > > > > > > _________________________________________________________________ > MSN Photos is the easiest way to share and print your photos: > http://photos.msn.com/support/worldwide.aspx > > > > ------------------------------------------------------- > This sf.net email is sponsored by: OSDN - Tired of that same old > cell phone? Get a new here for FREE! > https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390 > ------------------------------------------------------------------------ > leaf-user mailing list: [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/leaf-user > SR FAQ: http://leaf-project.org/pub/doc/docmanager/docid_1891.html > -- Jack Coates Monkeynoodle: A Scientific Venture... ------------------------------------------------------- This sf.net email is sponsored by: OSDN - Tired of that same old cell phone? Get a new here for FREE! https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390 ------------------------------------------------------------------------ leaf-user mailing list: [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/leaf-user SR FAQ: http://leaf-project.org/pub/doc/docmanager/docid_1891.html
