RE: NAT Statistics

From: Rick Stephens (rstephens@xxxxxxxxxx)
Date: Tue Aug 14 2001 - 12:51:02 GMT-3

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Just what I needed. Thank you.

-----Original Message-----
From: Chuck Larrieu [mailto:chuck@cl.cncdsl.com]
Sent: Tuesday, August 14, 2001 9:50 AM
To: Rick Stephens; ccielab@groupstudy.com
Subject: RE: NAT Statistics

found this in the documentation - master command reference.

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/ip_r
/iprprt1/1rdipadr.htm#15753
watch the wrap

I believe this should answer your questions.

Chuck

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Rick Stephens
Sent: Tuesday, August 14, 2001 7:30 AM
To: ccielab@groupstudy.com
Subject: NAT Statistics

Could anyone tell me what a few of these statistics mean?

This is a router that I have set up with NAT. It has 2 Static translations,
and one Pool running OVERLOAD on a single address. When I took this
statistic snapshot, the active translations showed the 2 static and
currently 71 translations in my PAT pool.
Question 1: What is the difference between 71 dynamic and 71 extended? Do
they mean the same thing?

Next, I see Hits and Misses.
Question 2: Are "Hits" sessions or ports opened? What makes up a miss? When
my PAT pool is full, will that cause a miss?

Finally, the pool "TEST" shows that it has the same start and end address,
thus 1 total address in the pool, and if that address is used then it is
100% full. This in itself I do not think is a problem.
Question 3: What are the 3032 misses after the pool and how do they differ
from the 14362 misses earlier in the stat?

Thanks, in advance.

Router#sh ip nat stat
Total active translations: 73 (2 static, 71 dynamic; 71 extended)
Outside interfaces:
  Serial0.1
Inside interfaces:
  FastEthernet0
Hits: 8232373 Misses: 14362
Expired translations: 14301
Dynamic mappings:
-- Inside Source
access-list 1 pool TEST refcount 71
 pool TEST: netmask 255.255.255.248
        start 192.168.1.1 end 192.168.1.1
        type generic, total addresses 1, allocated 1 (100%), misses 3032
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