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Chat Area => General Discussion Area => Topic started by: cem_devecioglu on 08 March 2012, 13:22:22

Title: Cisco experts..
Post by: cem_devecioglu on 08 March 2012, 13:22:22
I was curious but couldnt find a net answer, is "no ip directed -broadcast" default on cisco routers ?
Title: Re: Cisco experts..
Post by: STMO123 on 08 March 2012, 14:01:27
(http://i111.photobucket.com/albums/n156/stmo987/tumbleweed2.gif)
Title: Re: Cisco experts..
Post by: Mr Skrunts on 08 March 2012, 14:50:02
Ah well now that you ask.......

erm.....

sorry.....

I seems I have forgotton, old age and that....... ::)
Title: Re: Cisco experts..
Post by: SIR Philbutt on 08 March 2012, 14:52:20
Depends on which router and how it's connected .....  8)












Actually dont have a bloomin clue .... just thought it sounded good  :D :D :D :D
Title: Re: Cisco experts..
Post by: cem_devecioglu on 08 March 2012, 15:12:52
Depends on which router and how it's connected .....  8)














Actually dont have a bloomin clue .... just thought it sounded good  :D :D :D :D


Philbutt , have you considered to be a politician ;D :y
Title: Re: Cisco experts..
Post by: cem_devecioglu on 08 March 2012, 15:13:46
I know who can answer that question ::) ::)
Title: Re: Cisco experts..
Post by: cem_devecioglu on 08 March 2012, 15:15:59
(http://i111.photobucket.com/albums/n156/stmo987/tumbleweed2.gif)

 ::) ;D

I love that tumbleweed/bumblebee/humblepie whatever ;D ;D :y

ps: this bad memory killing me really >:(
Title: Re: Cisco experts..
Post by: SIR Philbutt on 08 March 2012, 15:34:19
Philbutt , have you considered to be a politician ;D :y

Not a chance, too straight talking, with common sense and real life experience for that  ::)

Used to be a senior manager in the past and could not stand the bullsh*t and back stabbing  :o :o
Title: Re: Cisco experts..
Post by: cem_devecioglu on 08 March 2012, 15:41:54
Philbutt , have you considered to be a politician ;D :y

Not a chance, too straight talking, with common sense and real life experience for that  ::)

Used to be a senior manager in the past and could not stand the bullsh*t and back stabbing :o :o

you couldnt be a govt manager either ;D
Title: Re: Cisco experts..
Post by: Marks DTM Calib on 08 March 2012, 16:42:23
IP directed broadcasts should be disabled by default as that is a requirement of the IEEE spec.......and given Cisco's staff wrote most of the layer three ones...
Title: Re: Cisco experts..
Post by: cem_devecioglu on 09 March 2012, 12:29:40
IP directed broadcasts should be disabled by default as that is a requirement of the IEEE spec.......and given Cisco's staff wrote most of the layer three ones...

thanks Mark..  :y

from what I see (I did some search) new models have this property enabled by default.. old models not.. but no detailed info on  which models which year.. :-\
Title: Re: Cisco experts..
Post by: SIR Philbutt on 09 March 2012, 14:28:42
IP directed broadcasts should be disabled by default as that is a requirement of the IEEE spec.......and given Cisco's staff wrote most of the layer three ones...

thanks Mark..  :y

from what I see (I did some search) new models have this property enabled by default.. old models not.. but no detailed info on  which models which year.. :-\

Seems I was almost right anyway - woohoo I'm a cisco expert - keep it coming  :D :D :D
Title: Re: Cisco experts..
Post by: TheBoy on 09 March 2012, 21:03:45
This is how we treat Cisco kit nowadays ::)

(http://theboy.omegaowners.com/oofpics/odds/c12000cards.JPG)
Title: Re: Cisco experts..
Post by: Marks DTM Calib on 09 March 2012, 21:05:11
Pity there blades.....!
Title: Re: Cisco experts..
Post by: TheBoy on 09 March 2012, 21:06:53
Pity there blades.....!
Nope...
Title: Re: Cisco experts..
Post by: VXL V6 on 10 March 2012, 16:36:34
I was curious but couldnt find a net answer, is "no ip directed -broadcast" default on cisco routers ?

Depends the vintage of the IOS.

If you have it enabled I suggest you think about using some ACL's!
Title: Re: Cisco experts..
Post by: Marks DTM Calib on 10 March 2012, 20:54:08
IP directed broadcasts should be disabled by default as that is a requirement of the IEEE spec.......and given Cisco's staff wrote most of the layer three ones...

thanks Mark..  :y

from what I see (I did some search) new models have this property enabled by default.. old models not.. but no detailed info on  which models which year.. :-\

Mmmm, not to spec and not liked by most operators either as its easy to flood a network using such schemes!
Title: Re: Cisco experts..
Post by: cem_devecioglu on 10 March 2012, 23:11:01
IP directed broadcasts should be disabled by default as that is a requirement of the IEEE spec.......and given Cisco's staff wrote most of the layer three ones...

thanks Mark..  :y

from what I see (I did some search) new models have this property enabled by default.. old models not.. but no detailed info on  which models which year.. :-\

Mmmm, not to spec and not liked by most operators either as its easy to flood a network using such schemes!

sorry I caused misunderstanding..
 
original parameter is "no ip directed -broadcast" if you enable it , there wont be any broadcast towards a specific ip , so it must be enabled :y
 
Title: Re: Cisco experts..
Post by: tomh on 11 March 2012, 06:44:53
Hi Cem,
this was disabled by default in IOS 11.3 iirc and is disabled in all versions since. this was done to reduce dos attacks using the directed broadcast as a reflector. It is starting to be enabled in a lot of places again as it is a required function to allow wake on LAN across subnet boundaries.

cheers

Tom
Title: Re: Cisco experts..
Post by: cem_devecioglu on 11 March 2012, 09:14:54
Hi Cem,
this was disabled by default in IOS 11.3 iirc and is disabled in all versions since. this was done to reduce dos attacks using the directed broadcast as a reflector. It is starting to be enabled in a lot of places again as it is a required function to allow wake on LAN across subnet boundaries.

cheers

Tom

 :y :y :y