networking-forum.com
Community Blog • Community Wiki * Register  * Search  * Login
View unanswered posts • View active topics

Board index » General » Forum Lobby

All times are UTC - 6 hours [ DST ]


Post new topic Reply to topic  Page 2 of 2
  [ 37 posts ]  Go to page Previous  1, 2
  Print view Previous topic | Next topic 
Author Message
Steven King
 Post subject: Re: Cabling Standards
PostPosted: Wed Jan 02, 2013 7:32 pm 
Offline
Post Whore
Post Whore
User avatar

Joined: Mon Nov 16, 2009 8:10 pm
Posts: 2509
Location: San Diego, CA
Certs: CCNP, BCNE, Network+, Security+
javin wrote:
Steven King wrote:
that1guy15 wrote:
No im talking about the transceiver. Think about how pissed everyone would be after spending all that money on X2 optics just a few years back and now not having any line cards to use them in after upgrading their current chassis.

Its just a guess but Im thinking this is why cisco keep the X2 on some cards. Who knows, it is strange though...



Ah ok - I'm on the same page as you now.

On a separate note... I swear everyday I run into something that just makes me feel dumb.

So, is there a difference between a fiber run between two switches, and a "fiber patch cable"? Like, what is used to connect, say, two buildings?

I'm curious because I see this:
Belkin 5 Meter 10 gig LC/LC Multimode Duplex Fiber Optic Cable 50/125

And this:
Patch cable - LC/PC multi-mode (M) - LC/PC multi-mode (M) - 66 ft - fiber optic - 50 / 125 micron - aqua


Only thing I can think of is the patch cables may not have to adhear to building fire codes but anything ran in walls does.

Side note: Looking at your Spreadsheet, why is LC the only connector listed for 1000SX and LX?


Regarding the side note, like I said before it's a work in progress - I added stuff to it as I saw it. It's far from complete.

_________________
Regards,

Steven King
San Diego Cisco User Group - http://www.sdcug.com
"The only time something is impossible is when you think it is." - Kevin Corbin, CCIE #11577
Top
 Profile  
 
ristau5741
 Post subject: Re: Cabling Standards
PostPosted: Thu Jan 03, 2013 8:06 am 
Offline
Post Whore
Post Whore
User avatar

Joined: Tue Aug 21, 2007 2:15 pm
Posts: 8260
Location: Frederick MD
Certs: Instanity
Steven King wrote:

So, is there a difference between a fiber run between two switches, and a "fiber patch cable"? Like, what is used to connect, say, two buildings?



a fiber patch cable is typically already crossed over, the fiber runs, or extensions are straight through.

learned this when we did a data center upgrade a few years ago, rehomed a bunch of IDF closets into the data center, a bunch of fiber extensions were ordered, thus nothing worked when we connected it. had to have the company come back and swap all the fiber pairs on one side to make them cross over, tx/rx

_________________
"If you're good at anticipating the human mind. It leaves nothing to chance."
-Jigsaw
Top
 Profile  
 
Steven King
 Post subject: Re: Cabling Standards
PostPosted: Thu Jan 03, 2013 5:09 pm 
Offline
Post Whore
Post Whore
User avatar

Joined: Mon Nov 16, 2009 8:10 pm
Posts: 2509
Location: San Diego, CA
Certs: CCNP, BCNE, Network+, Security+
Ahhhhh interesting! Thanks!

_________________
Regards,

Steven King
San Diego Cisco User Group - http://www.sdcug.com
"The only time something is impossible is when you think it is." - Kevin Corbin, CCIE #11577
Top
 Profile  
 
mlan
 Post subject: Re: Cabling Standards
PostPosted: Thu Jan 03, 2013 7:36 pm 
Offline
Senior Member
Senior Member
User avatar

Joined: Thu Nov 17, 2011 6:09 pm
Posts: 487
Location: Portland, OR
ristau5741 wrote:
learned this when we did a data center upgrade a few years ago, rehomed a bunch of IDF closets into the data center, a bunch of fiber extensions were ordered, thus nothing worked when we connected it. had to have the company come back and swap all the fiber pairs on one side to make them cross over, tx/rx


If you are unlucky or have no budget/resources, you get to cross those pairs yourself on your patch cables. I have ran into a few patchbays where there was no logical pairing of tx/rx at all.
Top
 Profile  
 
Steven King
 Post subject: Re: Cabling Standards
PostPosted: Fri Jan 04, 2013 2:50 pm 
Offline
Post Whore
Post Whore
User avatar

Joined: Mon Nov 16, 2009 8:10 pm
Posts: 2509
Location: San Diego, CA
Certs: CCNP, BCNE, Network+, Security+
How does one go about crossing them yourself? I'm not sure I fully understand - anyone aware of any good docs/websites off the top of their heads that explain this in addition for the need of fiber patch cables?

My old Network+ book doesn't go over this... after reviewing it, looks like it's time for that one to go in the trash or to a young buck who's just starting.

EDIT - My "Network Administrators Survival Guide" and "Campus Network Design Fundamentals" books don't go over it either. :(

_________________
Regards,

Steven King
San Diego Cisco User Group - http://www.sdcug.com
"The only time something is impossible is when you think it is." - Kevin Corbin, CCIE #11577
Top
 Profile  
 
that1guy15
 Post subject: Re: Cabling Standards
PostPosted: Fri Jan 04, 2013 3:12 pm 
Offline
Post Whore
Post Whore
User avatar

Joined: Thu Apr 29, 2010 6:12 pm
Posts: 2066
Location: Texas
Certs: CCNP, CCDP, CCIP
With LC usually the Tx and Rx are independent from each other and you just swap the ports they plug into. With SC and some LC connectors they are usually fixed together in which case Im not sure unless you connect 1 meter jumper to cross them. Its pretty common for the Tx/Rx to get plugged in incorrectly so if you dont get a link this is usually the first thing I try.

_________________
http://blog.movingonesandzeros.net/
Top
 Profile  
 
srg
 Post subject: Re: Cabling Standards
PostPosted: Fri Jan 04, 2013 3:17 pm 
Offline
Post Whore
Post Whore
User avatar

Joined: Thu Dec 30, 2010 2:05 pm
Posts: 1125
Location: Stockholm, SE
Certs: CCNP, CCNP SP, CCDA, CCNA DC, CCNA W, HP MASE
You can always dismantle the connector on the patch cable, be it LC or SC, and swap them.

_________________
som om sinnet hade svartnat för evigt.
Top
 Profile  
 
ristau5741
 Post subject: Re: Cabling Standards
PostPosted: Fri Jan 04, 2013 3:20 pm 
Offline
Post Whore
Post Whore
User avatar

Joined: Tue Aug 21, 2007 2:15 pm
Posts: 8260
Location: Frederick MD
Certs: Instanity
srg wrote:
You can always dismantle the connector on the patch cable, be it LC or SC, and swap them.


yeah they just snap apart, harder to get back together, I've broken so many...

_________________
"If you're good at anticipating the human mind. It leaves nothing to chance."
-Jigsaw
Top
 Profile  
 
javin
 Post subject: Re: Cabling Standards
PostPosted: Fri Jan 04, 2013 3:29 pm 
Offline
Ultimate Member
Ultimate Member

Joined: Wed Aug 29, 2012 5:20 pm
Posts: 619
Location: Portland, OR
Certs: CCNA, CCNA-Voice, Security +
that1guy - I usually end up with LC that are connected I guess it is all about what was orderd.

But most (all?) the duplex couplers can be dismantled, but like ristau said, not always put back together...

_________________
Discipline

"The only real security that a man can have in this world is a reserve of knowledge, experience and ability" - Henry Ford
Top
 Profile  
 
Steven King
 Post subject: Re: Cabling Standards
PostPosted: Fri Jan 04, 2013 6:01 pm 
Offline
Post Whore
Post Whore
User avatar

Joined: Mon Nov 16, 2009 8:10 pm
Posts: 2509
Location: San Diego, CA
Certs: CCNP, BCNE, Network+, Security+
javin wrote:
.... but like ristau said, not always put back together...


Bahhhhhh that's what duct tape is for. :P

_________________
Regards,

Steven King
San Diego Cisco User Group - http://www.sdcug.com
"The only time something is impossible is when you think it is." - Kevin Corbin, CCIE #11577
Top
 Profile  
 
that1guy15
 Post subject: Re: Cabling Standards
PostPosted: Fri Jan 04, 2013 6:09 pm 
Offline
Post Whore
Post Whore
User avatar

Joined: Thu Apr 29, 2010 6:12 pm
Posts: 2066
Location: Texas
Certs: CCNP, CCDP, CCIP
javin wrote:
that1guy - I usually end up with LC that are connected I guess it is all about what was orderd.

But most (all?) the duplex couplers can be dismantled, but like ristau said, not always put back together...


Yeah the last few orders of LCs were that way but the majority of what I have purchased or worked with in the past have been separate. Ill have to pay attention to that in my next order. Im also LOVING that SFPs now have the direction arrows printed on them!! Never noticed this until my last few orders.

_________________
http://blog.movingonesandzeros.net/
Top
 Profile  
 
javin
 Post subject: Re: Cabling Standards
PostPosted: Mon Jan 07, 2013 1:38 am 
Offline
Ultimate Member
Ultimate Member

Joined: Wed Aug 29, 2012 5:20 pm
Posts: 619
Location: Portland, OR
Certs: CCNA, CCNA-Voice, Security +
that1guy15 wrote:
javin wrote:
that1guy - I usually end up with LC that are connected I guess it is all about what was orderd.

But most (all?) the duplex couplers can be dismantled, but like ristau said, not always put back together...


Yeah the last few orders of LCs were that way but the majority of what I have purchased or worked with in the past have been separate. Ill have to pay attention to that in my next order. Im also LOVING that SFPs now have the direction arrows printed on them!! Never noticed this until my last few orders.


Arrows!? how... logical! That is awesome.

_________________
Discipline

"The only real security that a man can have in this world is a reserve of knowledge, experience and ability" - Henry Ford
Top
 Profile  
 
srg
 Post subject: Re: Cabling Standards
PostPosted: Mon Jan 07, 2013 1:41 am 
Offline
Post Whore
Post Whore
User avatar

Joined: Thu Dec 30, 2010 2:05 pm
Posts: 1125
Location: Stockholm, SE
Certs: CCNP, CCNP SP, CCDA, CCNA DC, CCNA W, HP MASE
They've been there like forever :)

_________________
som om sinnet hade svartnat för evigt.
Top
 Profile  
 
that1guy15
 Post subject: Re: Cabling Standards
PostPosted: Mon Jan 07, 2013 9:19 am 
Offline
Post Whore
Post Whore
User avatar

Joined: Thu Apr 29, 2010 6:12 pm
Posts: 2066
Location: Texas
Certs: CCNP, CCDP, CCIP
srg wrote:
They've been there like forever :)

Your gonna make me go dig through some of my old SFPs! Unless I have just never looked I dont remember them being there in the past. Maybe non-cisco SFPs are this way as Ive always worked with Cisco SFPs.

_________________
http://blog.movingonesandzeros.net/
Top
 Profile  
 
srg
 Post subject: Re: Cabling Standards
PostPosted: Mon Jan 07, 2013 9:33 am 
Offline
Post Whore
Post Whore
User avatar

Joined: Thu Dec 30, 2010 2:05 pm
Posts: 1125
Location: Stockholm, SE
Certs: CCNP, CCNP SP, CCDA, CCNA DC, CCNA W, HP MASE
that1guy15 wrote:
srg wrote:
They've been there like forever :)

Your gonna make me go dig through some of my old SFPs! Unless I have just never looked I dont remember them being there in the past. Maybe non-cisco SFPs are this way as Ive always worked with Cisco SFPs.

:D. Some vendors make them reeaally discrete though.

_________________
som om sinnet hade svartnat för evigt.
Top
 Profile  
 
that1guy15
 Post subject: Re: Cabling Standards
PostPosted: Mon Jan 07, 2013 9:46 am 
Offline
Post Whore
Post Whore
User avatar

Joined: Thu Apr 29, 2010 6:12 pm
Posts: 2066
Location: Texas
Certs: CCNP, CCDP, CCIP
Alright, I checked my old SFPs. All Cisco and of various types. Its about 50/50 with or without markings. Those with markings are either stamped into the SFP, painted on the SFP or printed on the sticker. No consistency either.

_________________
http://blog.movingonesandzeros.net/
Top
 Profile  
 
Steven King
 Post subject: Re: Cabling Standards
PostPosted: Mon Jan 07, 2013 10:26 am 
Offline
Post Whore
Post Whore
User avatar

Joined: Mon Nov 16, 2009 8:10 pm
Posts: 2509
Location: San Diego, CA
Certs: CCNP, BCNE, Network+, Security+
Heh... its like cabling, physical terminators, and transceivers are the bastard children of networking...

_________________
Regards,

Steven King
San Diego Cisco User Group - http://www.sdcug.com
"The only time something is impossible is when you think it is." - Kevin Corbin, CCIE #11577
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 2 of 2
  [ 37 posts ]  Go to page Previous  1, 2

Board index » General » Forum Lobby

All times are UTC - 6 hours [ DST ]

Who is online

Users browsing this forum: burnyd, FaceBook [Linkcheck] and 5 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group