Hi
I still don´t understand it. I know that multicast address range is 224.0.0.0 -
239.255.255.255
Regards
Ahmed
--- Den lör 2009-12-26 skrev Rick Mur <r...@ipexpert.com>:
Från: Rick Mur <r...@ipexpert.com>
Ämne: Re: [OSL | CCIE_RS] Detailed solution page 701 TASK 24.3
Till: "Ahmed Haji Munye" <ahmhaj...@yahoo.se>
Kopia: "CC IE" <ccie_rs@onlinestudylist.com>
Datum: lördag 26 december 2009 15.05
Just binary math my friend :-)
The last 3 octets are all 1, so match everything.
First octet:11100000 = 22400000111 = 7
Meaning that everything matches from 11100000 up to 11100111
11100111 = 231
Class D addresses reach from 224 to 239, so Class D is 16 subnets large. Half
of 16 is 8 when matching 224 up to 231 you have your 8 subnets which is half of
the multicast range :-)
--
Regards,
Rick Mur
CCIE2 #21946 (R&S / Service Provider)
Sr. Support Engineer – IPexpert, Inc.
URL: http://www.IPexpert.com
On 26 dec 2009, at 15:55, Ahmed Haji Munye wrote:
Hi
On the detailed solution task 24.3, it says " Set R2 to advertise itself as as
the RP for the first half of all groups"
My question is from where did you get the multicast 224.0.0.0 7.255.255.255 ?
Regards
Ahmed
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