Hi Amer,

 

Based on what you are showing there is a permit statement after the deny.

 

I am not sure about the 100s of loopbacks but 0.0.0.6 does capture
200.0.0.2/4/6

 

 

0              0              0              0              0              1
1              0  - Don't care about the 2 and 3 bit 

128         64           32           16           8              4
2              1

 

 

Possible matches include 6,  4, 2

 

Not sure if this helps

 

 

 

From: [email protected]
[mailto:[email protected]] On Behalf Of Amer Mustafa
Sent: October-19-10 12:01 PM
To: [email protected]
Subject: [OSL | CCIE_RS] WorkBook 1 - LAB16.

 

WorkBook 1 - LAB16. task : 16.1

 

The task says deny packet sourced from R2, R4 and R6 loopback addresses, on
R4 there are 100s of Loopback address, while in solving the task in Detailed
solution guide and Blended they have chosed to deny 200.0.0.2 , 200.0.0.4
and 200.0.0.6, any idea why ?

 

The command used in the detailed guide is : 

 

access-list 1 deny 200.0.0.0 0.0.0.6 

access-list 1 permit any log 

int f0/0 

  ip access-group 1 in 

----

 

also another thing, 

 

since the access lists are implicit deny dont we need to permit any after
denying everything ?

 

like : 

 

access-list 1 deny 200.0.0.0 0.0.0.6 log

access-list 1 permit any 

 

please advise

 

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