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i think you meant 3,4 and 6th? right?
On 3/30/08, Shine Joseph wrote: > > Mike, > > > > No. you can ahave any value from 0 to 255 for the wild cards. I will give > you a couple of examples. > > > > The wild card 12 is valid, but would match only the 3rd and 4th bits from > LSB - from right most. > > That is, when you write them in binary, it becomes > > 0000 0000 - 0 > > 0000 0100 - 4 > > 0000 1000 - 8 > > 0000 1100 - 12 > > > > So when you use this wild card in an access-list it matches only these 4 > addresses. > > > > A wild card of 44 means either 0 or 1 on the bit positions 3, 5, 6 or in > binary > > > > 0000 0000 - 0 > > 0000 0100 - 4 > > 0000 1000 - 8 > > 0000 1100 - 12 > > 0010 0000 - 32 > > 0010 0100 - 36 > > 0010 1000 - 40 > > 0010 1100 - 44 > > > > Thus, the wild card of 44 matches the above 8 addresses. > > > > HTH, > > Shine > > > > _____ > > From: Mike Haddad [mailto:mike.haddad@hotmail.com] > Sent: Monday, 31 March 2008 11:51 AM > To: Shine Joseph; ccielab@groupstudy.com > Subject: RE: Multicast Grouping > > > > Hello Shine, > > You’re right and as long as I understand the valid wildcards are : 1 3 7 > 15 31 63 127 and 255. So using a wild card of 12 is considered invalid? > > Thanks, > > > > From: shinepjoseph@iprimus.com.au > > To: mike.haddad@hotmail.com; ccielab@groupstudy.com > > Subject: RE: Multicast Grouping > > Date: Sun, 30 Mar 2008 22:09:38 +1100 > > > > Mike, > > > > Write them in binary. > > 226 - 1110 0010 > > 12 - 0000 1100 > > > > The possible combinations would be: > > 1110 0010 - 226 > > 1110 0110 - 230 > > 1110 1010 - 234 > > 1110 1110 - 238 > > > > So by having a mask of 12 you are are matching only above 4 addresses. > > > > HTH, > > Shine > > > > > > —–Original Message—– > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of > Mike > > Haddad > > Sent: Sunday, 30 March 2008 5:55 PM > > To: ccielab@groupstudy.com > > Subject: Multicast Grouping > > > > Hello, > > > > I still don’t understand why the below ACL can’t be grouped: > > interface Loopback0 > > ip pim sparse-dense-mode > > ! > > ip pim send-rp-announce Loopback0 scope 16 group-list 50 > > ! > > access-list 50 permit 226.0.0.0 1.255.255.255 > > access-list 50 permit 228.0.0.0 3.255.255.255 > > access-list 50 permit 232.0.0.0 3.255.255.255 > > access-list 50 permit 236.0.0.0 1.255.255.255 > > access-list 50 permit 238.0.0.0 0.255.255.255 > > > > > > Why can’t we group them as: > > access-list 50 permit 226.0.0.0 12.255.255.255 > > > > Thanks for the clarification, > > > > _________________________________________________________________ > > Enter the Hunt & you could win a 2008 Eclipse Spyder! Click here to > enter! > > http://g.msn.ca/ca55/213 > > > > _______________________________________________________________________ > > Subscription information may be found at: > > http://www.groupstudy.com/list/CCIELab.html > > > > > > > > _____ > > Express yourself with free Messenger emoticons. Get them today! > > > _______________________________________________________________________ > Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html