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RE: IP Prefix-List issue posted 03/07/2006
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No, that would look for an exact mask...

10.10.0.0/16 says "anything in this range" as your first criteria.  The le
30 part says that the mask on whatever route you are handed must be 30 bits
or less.

255.255.0.0 (/16) that you started with, all the way to 255.255.252.0 (/30)
that is your ending criteria.

HTH,

 
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
IPExpert CCIE Program Manager
IPExpert Sr. Technical Instructor
swm@xxxxxxxxxx/smorris@xxxxxxxxxxxx
http://www.ipexpert.com
 
 

-----Original Message-----
From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf Of
Mushtaq A. Khan
Sent: Tuesday, March 07, 2006 3:00 PM
To: ccielab@xxxxxxxxxxxxxx
Subject: IP Prefix-List issue

All,

I have recently read one very good posting on prefix-list in the groupstudy
and thought I now understand it very well but look like I still have some
confusions. Can someone help me out here.

For the prefix list "ip prefix-list permit 10.10.0.0/16 ge 30 le 30" I think
it will match the first 16 bits and will use a mask of 255.255.255.252. If
this is correct, will this permit 10.10.0.0 and 10.10.0.4 or only
10.10.0.4as the mask seems to limit to match the 30th bit.

Thanks,
Mushtaq

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