>Agreed, these input from Howard are very helpful. > >Can you, or anyone out there in the cisco development community, show some >light about this basic redistribution mechanism? Sharing those information >shouldn't hurt Cisco at all, but will help Cisco's user community a lot. >From technical point of view, I believe Cisco's competitors such as Juniper >already have deep understanding of Cisco's IOS, (when you think about the >fact that quite a few pioneers in the network field are already working for >Juniper). > >Just a side thought. > >James
That's a difficult call. It's common knowledge that one can make a nuclear weapon, the basic mechanisms are known, but the specific techniques of manufacturing a miniaturized bomb are properly secret. How to distribute routes and build a routing table is common knowledge. How to do that fast and with resource efficiency tend to be held tightly. The external behavior of a router can be discussed, and perhaps Cisco might be willing to come up with some discussion if there's enough customer demand. To make this happen, a number of real customers need to ask their sales reps and SEs. The developers are unlikely to initiate this writeup. I know that at Nortel, where many of the people who had written original code had left the company (and no, we didn't have a single IOS), I had to read through code to find details such as this. > >-----Original Message----- >From: Cameron, John [mailto:[EMAIL PROTECTED]] >Sent: Friday, February 15, 2002 4:14 PM >To: ccielab; Howard C. Berkowitz >Subject: RE: How route redistribution EXACTLY works (followup) > > >Howard, > >I do not believe you have gone too far. You have simply provided >some extra details that some of us may be interested in. There may >may be some on this list that are interested in more detailed >information >along the way to their CCIE > >just my .02 >JDC > > > >-----Original Message----- >From: Jaeheon Yoo [mailto:[EMAIL PROTECTED]] >Sent: Friday, February 15, 2002 12:23 AM >To: ccielab; Howard C. Berkowitz >Subject: Re: How route redistribution EXACTLY works (followup) > > >Hey, Howard. >I always admire your posts. :) >But as you admitted at the bottom of your own post, I'm afraid you've >gone too far here. > >I think that's the difference between the requirements for >administrators and those for implementors in general. >When I read some RFC stuffs, I'm always having this kind of confusion. >Do we ever really need such in-depth knowledge that may be useful only >to real protocol implementors? >Yes, it will help us when we know every detail of ins and outs of >protocols, I know that. >But we're already behind the schedule to cover ever expanding variety of >networking subjects. > >Anyway, thanks for your insights. > >Jaeheon > >----- Original Message ----- >From: "Howard C. Berkowitz" >To: >Sent: Friday, February 15, 2002 12:49 PM >Subject: RE: How route redistribution EXACTLY works (followup) > > >> >> I hate to follow up my own posts, but let me offer some suggested >> general reading. >> >> Look at RFC1812, which will give some broad specifications. >> >> John Moy's OSPF books will give you an example of how a protocol >> implementation is designed -- the second book has the code of an >> actual implementation. >> >> You can also download the free Zebra code and examine it. Zebra's >> command language is closer to Cisco's than is GateD. Old versions of >> GateD are downloadable, but the more recent versions are commercial. >> Indeed, there's a commercial version of Zebra called IPinfusion. >> >> At some point, you're going to need to understand a fair bit about >> data structures and searching them. Donald Knuth's _The Art of >> Computer Programming_, Volume 3, has a good deal about it. You also >> may want to do web searches for radix and Patricia trees (also >> spelled tries). The IOS internals book has some material on this sort >> of table. >> >> Agreeing with some other posters, this is interesting material, but > > frankly I'd call it at a level beyond CCIE. >> _________________________________________________________________ >> Commercial lab list: http://www.groupstudy.com/list/commercial.html >> Please discuss commercial lab solutions on this list. >_________________________________________________________________ >Commercial lab list: http://www.groupstudy.com/list/commercial.html >Please discuss commercial lab solutions on this list. >_________________________________________________________________ >Commercial lab list: http://www.groupstudy.com/list/commercial.html >Please discuss commercial lab solutions on this list. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=35573&t=35573 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
