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Log from #cisco at freenode 2006-05-17
[06:06]<djuxxx>screw that
[06:06]<djuxxx>500 dollars is my limit
[06:06]<[mzvzyw_]>hmm, not much for that amount
[06:06]<djuxxx>nemith what kind of hardware should i get to study for CCSP?
[06:06]<djuxxx>i mean whats ur recommendation
[06:06]<gndyvx>i don't know
[06:07]<gndyvx>and don't care
[06:07]<gndyvx>See i don't care for the CCSP
[06:07]<djuxxx>CCNP for ya?
[06:07]<gndyvx>actually i don't care
[06:07]<djuxxx>u got any certs?
[06:07]<gndyvx>DouXXX: i've been a ccnp for over a year
[06:08]<djuxxx>nice
[06:08]<djuxxx>u make good living?
[06:08]<gndyvx>i do alright
[06:08]<djuxxx>where do u live
[06:08]<gndyvx>colorado
[06:08]<vcul>nemith, yeah i'm really focused on the ccnp even though i'm currently studying for the ccna. i want to make sure that if something bad happens (crossing fingers) i can still have ccna paper for encouragements
[06:08]<dzzc1lyvn>the Rockies
[06:08]<djuxxx>fort lauderdale are having a hard time finding people with CCNP
[06:09]<gndyvx>tkup: yeah.. i'd recommed it to anyone wanting to do anything involving routing or switching
[06:09]<dzzc1lyvn>nemith: on your networks
[06:09]<dzzc1lyvn>which do you run?
[06:09]<djuxxx>im a broncos fan LOL
[06:09]<dzzc1lyvn>pvst+ or rstp?
[06:09]<djuxxx>jay cutler.. hell yea!
[06:09]<gndyvx>rapid-pvst+
[06:09]<gndyvx>:)
[06:11]<mrxmjum>hmmm
[06:11]<mrxmjum>Adjacency table is stored in DDR DRAM, not in TCAM
[06:11]<mrxmjum>why?
[06:11]<dzzc1lyvn>Rapid PVST+ is
[06:11]<dzzc1lyvn> recommended because it gives the benefit of RSTP on a per-VLAN basis without having to configure
[06:11]<dzzc1lyvn>MST.
[06:12]<gndyvx>Mahmoud: adjacency for what?
[06:12]<djuxxx>what does ur lab setup look like nemith?
[06:12]<mrxmjum>nemith, for CEF.. we have FIB, Adj table
[06:12]<mrxmjum>nemith, layter 3 switching in hardware using CEF
[06:12]<[mzvzyw_]>probably because the CEF table is huge
[06:13]<gndyvx>Mahmoud: CEF is acutally part of the tcam
[06:13]<[mzvzyw_]>or can be
[06:13]<gndyvx>but the TCAM is in DRAM
[06:13]<mrxmjum>nemith, also CAM?
[06:13]<gndyvx>no
[06:13]<gndyvx>CAM means content addressable memory
[06:13]<mrxmjum>TCAM means same thing except for ternary :/
[06:14]<gndyvx>right
[06:14]<mrxmjum>nemith, what does this say?
[06:14]<gndyvx>i dunno dude
[06:14]<mrxmjum>hmmm
[06:14]<gndyvx>DouXXX: it is a production network of about 300 routers :)
[06:14]<dzzc1lyvn>ternary
[06:14]<dzzc1lyvn>is a group of 3
[06:15]<dzzc1lyvn>fib tcam
[06:15]<djuxxx>300? geez!
[06:15]<djuxxx>ur the only network admin?
[06:15]<gndyvx>network engineer III
[06:15]<gndyvx>i thank you ;)
[06:15]<mrxmjum>weird
[06:15]<mrxmjum>there is a diagram that says "FIB is in TCAM, Adj Table is in DDR DRAM"
[06:16]<gndyvx>that makes sense
[06:17]<mrxmjum>but you said TCAM is in DDR DRAM
[06:17]<gndyvx>it is...
[06:17]<mrxmjum>but what netacad implies is that TCAM is something else other than DDR DRAM
[06:17]<gndyvx>oh no, the world is comming to and end
[06:17]<gndyvx>an
[06:17]<mrxmjum>they dont say it directly, but this diagram gives me this feeling (that they are in separate hardware)
[06:17]<mrxmjum>cisco.com says "The TCAM is a specialized piece of memory designed for rapid table lookups by the Access Control List (ACL) engine on the Catalyst 3550 switches"
[06:18]<djuxxx>III??
[06:18]<gndyvx>exactly
[06:18]<djuxxx>level 3?
[06:18]<djuxxx>or something
[06:18]<gndyvx>DouXXX: yeah
[06:18]<djuxxx>thats the highest?
[06:18]<mrxmjum>so TCAM is a different memory than DDR DRAM?
[06:18]<gndyvx>Mahmoud: a peice of memory
[06:18]<mrxmjum>nemith, and they all use DDR DRAM memories?
[06:18]<[mzvzyw_]>it should read: A separate area of memory. or so I would think.
[06:19]<mrxmjum>hmmm confusing
[06:19]<[mzvzyw_]>TCAM can grow extremely large though because of it's layer 3/4 nature.
[06:19]<[mzvzyw_]>CAM is relatively compact since it's just L2
[06:19]<[mzvzyw_]>I think. <.<
[06:19]<[mzvzyw_]>I haven't actually studied BCMSN yet
[06:20]<mrxmjum>i'll just memorize it for today's exam
[06:20]<[mzvzyw_]>Don't see where it really comes into play much in the real world.
[06:21]<dzzc1lyvn>Mahmoud: http://www.enterprisenetworkingplanet.com/nethub/article.php/3527301
[06:21]<[mzvzyw_]>I mean, I suppose it's possible to get TCAM overflows, but other than that, meh
[06:22]<gndyvx>it really depends on the hardware
[06:22]<gndyvx>TCAM should be on the PFC
[06:24]<[mzvzyw_]>that's like integrated though in anything modern, right/
[06:24]<[mzvzyw_]>?
[06:24]<mrxmjum>Dark3Lite, thanks
[06:25]<gndyvx>policy forwarding engine... they heart of the 6k
[06:25]<gndyvx>er card
[06:26]<mrxmjum>so CAM, TCAM are not DDR DRAM. they are separate memory hardwares
[06:27]<[mzvzyw_]>I didn't think there was any other memory in most devices, other than very small ASIC/CPU caches
[06:30]<gndyvx>i know i can support more in the tcam on a pfc or a dfc if i upgrade the memory
[06:32]<vcul>I'm trouble shooting this 2500. It doesn't boot or even power on. I'm suspecting it's the PS. the 2500 itself doesn't have any memory or flash. shouldn't it at least power on and then beep if it was a memory problem?
[06:32]<gndyvx>maybe not
[06:34]<vcul>damn too many questions.







