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daytime
Guest
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 Posted: Sun Jul 01, 2007 2:13 pm Post subject: OSPF question |
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Hi all-I was on an exam site called http://www.ciscolabrat.co.uk/
One of the questions has two answers-but which one is correct?
In a multi access Ethernet network where does a router send an LSU
when it detects a directly connected network has failed?
1-out all interfaces to all neighbors
2-To all congfigged neighbors within the AS
3-To all configged neighbors within theOSPF area
4 -to the DR
my first attempt I put 3-which was marked incorrect-I then tried again
with 4(which is the answer it gave me) then it said the answer was 3.
Tried looking all over for a correct answer-all help greatfully
appreciated. |
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Gabriele Beltrame
Guest
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| Posted: Sun Jul 01, 2007 2:49 pm Post subject: Re: OSPF question |
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"daytime" <validatpart@yahoo.co.uk> ha scritto nel messaggio
news:1183281198.544271.204850@k29g2000hsd.googlegroups.com...
| Quote: | Hi all-I was on an exam site called http://www.ciscolabrat.co.uk/
One of the questions has two answers-but which one is correct?
In a multi access Ethernet network where does a router send an LSU
when it detects a directly connected network has failed?
1-out all interfaces to all neighbors
2-To all congfigged neighbors within the AS
3-To all configged neighbors within theOSPF area
4 -to the DR
my first attempt I put 3-which was marked incorrect-I then tried again
with 4(which is the answer it gave me) then it said the answer was 3.
Tried looking all over for a correct answer-all help greatfully
appreciated.
|
Hi,
If there is a DR ( default for an Ethernet domain ) the LSUs are sent to the
DR (and BDR) by multicasting using address 224.0.0.6 instead of the "usual"
224.0.0.5. The DR, in turn, sends the LSU to the other routers in the same
ethernet domain.
Regards,
Gabriele |
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Gabriele Beltrame
Guest
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| Posted: Sun Jul 01, 2007 8:54 pm Post subject: Re: OSPF question |
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"John Petersen" <nobody@mixmin.net> ha scritto nel messaggio
news:657e01cee026788f15ba422179b35f82@anon.mixmaster.mixmin.net...
| Quote: | On Sun, 1 Jul 2007 11:49:11 +0200
"Gabriele Beltrame" <belgab@drvsource.net> wrote:
If there is a DR ( default for an Ethernet domain ) the LSUs are sent to
the
DR (and BDR) by multicasting using address 224.0.0.6 instead of the
"usual"
224.0.0.5. The DR, in turn, sends the LSU to the other routers in the
same
ethernet domain.
By domain, do you mean the whole AS (all the areas) or the LAN segments
the DR
is directly connected to?
Hi, |
I mean broadcast domain.
Regards,
Gabriele |
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daytime
Guest
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| Posted: Wed Jul 04, 2007 10:25 pm Post subject: Re: OSPF question |
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On 1 Jul, 16:54, "Gabriele Beltrame" <bel...@drvsource.net> wrote:
| Quote: | "John Petersen" <nob...@mixmin.net> ha scritto nel messaggionews:657e01cee026788f15ba422179b35f82@anon.mixmaster.mixmin.net...
On Sun, 1 Jul 2007 11:49:11 +0200
"Gabriele Beltrame" <bel...@drvsource.net> wrote:
If there is a DR ( default for an Ethernet domain ) the LSUs are sent to
the
DR (and BDR) by multicasting using address 224.0.0.6 instead of the
"usual"
224.0.0.5. The DR, in turn, sends the LSU to the other routers in the
same
ethernet domain.
By domain, do you mean the whole AS (all the areas) or the LAN segments
the DR
is directly connected to?
Hi,
I mean broadcast domain.
Regards,
Gabriele
|
So to clarify -the correct answer is 3)to all configged routers in the
OSPF area-not the AS?
ALso is 224.0.0.6 for all DR routers and 224.0.0.5 for all other
routers? |
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Gabriele Beltrame
Guest
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| Posted: Thu Jul 05, 2007 4:30 pm Post subject: Re: OSPF question |
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"daytime" <validatpart@yahoo.co.uk> ha scritto nel messaggio
news:1183569921.110557.119380@m36g2000hse.googlegroups.com...
| Quote: |
So to clarify -the correct answer is 3)to all configged routers in the
OSPF area-not the AS?
ALso is 224.0.0.6 for all DR routers and 224.0.0.5 for all other
routers?
|
Hi,
Correct answer is 4) To the DR (and BDR)
Yes, 224.0.0.6 is for DR/BDR and 224.0.0.5 is for "the others".
Regards,
Gabriele |
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daytime
Guest
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| Posted: Fri Jul 06, 2007 12:12 am Post subject: Re: OSPF question |
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On 5 Jul, 12:30, "Gabriele Beltrame" <bel...@drvsource.net> wrote:
| Quote: | "daytime" <validatp...@yahoo.co.uk> ha scritto nel messaggionews:1183569921.110557.119380@m36g2000hse.googlegroups.com...
So to clarify -the correct answer is 3)to all configged routers in the
OSPF area-not the AS?
ALso is 224.0.0.6 for all DR routers and 224.0.0.5 for all other
routers?
Hi,
Correct answer is 4) To the DR (and BDR)
Yes, 224.0.0.6 is for DR/BDR and 224.0.0.5 is for "the others".
Regards,
Gabriele
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Many thanks |
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