Access list without wildcard mask

[mh.gorjizadeh]

Hello dear friends .

It's my first question on Cisco forum. 

I would like to know when we write some standard access list without wild card mask which range of ip addresses will be proceed?

for example take a look at this one:

access-list 3 deny 10.17.32.0

so which range of ip addresses will be proceed ?

or this one 

access-list 2 permit host 172.16.14.0

Thanks for your response 

[vivek srivastava · Accepted solution]

In standard ACL,  mask is optional meaning if no wildcard-mask is configured it will take as 0.0.0.0 i.e. eual to host.

from cisco:

To specify a large number of individual addresses more easily, you can omit the wildcard if it is all zeros. Thus, the following two configuration commands are identical in effect:

access-list 2 permit 36.48.0.3

access-list 2 permit 36.48.0.3  0.0.0.0

[mh.gorjizadeh]

I got it 

but if we are talking about for example :

access-list 3 deny 10.17.32.0 

does our router consider this ip address which is ip address of a network as a single ip address ?

in other meaning  is it equal to :

access-list 3 deny 10.17.32.0  0.0.0.0 

Thank you 

[vivek srivastava]

Yes correct. Both statement do the same work.

[mh.gorjizadeh]

Oh OK i got it.

I just forgot that specially in point to point links we can also set ip addresses with 0 in forth octet.

I appreciate your for your help and respond.

Thank you a lot 

- See more at: https://supportforums.cisco.com/discussion/12509746/access-list-without-wildcard-mask#comment-10595111

[amchang]

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[rosaho]

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