IP Range Assigning Post: 302974543

Login or Register to Ask a Question and Join Our Community

Sponsored Content

Homework and Emergencies Homework & Coursework Questions IP Range Assigning Post 302974543 by RudiC on Tuesday 31st of May 2016 02:06:27 PM

Old

05-31-2016

Registered User

That's all about how the 32 address bits are being distributed between network address and host address. /18 means the most significant 18 bits designate the network part, and the remaining 14 bits the host part. 192.168.0.0/18 will give you 4 subnets with 16384 (= 2^14) addresses each:

Code:

192.168.0.0
192.168.64.0
192.168.128.0
192.168.192.0

For minimum 1000 devices you'll need 10 bits to accommodate 1024 addresses, so the internal /22 netmask comes in handy (32 bit - 22 bit = 10 bit addresses in each subnet). The 16 (= 2^4; 4 = 14 - 10) sub-subnet ranges are

Code:

192.168.0.0
192.168.4.0
192.168.8.0
192.168.12.0
192.168.16.0
192.168.20.0
192.168.24.0
192.168.28.0
192.168.32.0
192.168.36.0
192.168.40.0
192.168.44.0
192.168.48.0
192.168.52.0
192.168.56.0
192.168.60.0

, the 9th of which - depending how you count them, starting from 0 or 1 - is the network address 192.168.32.0 with the broadcast address 192.168.35.255 (hopefully, as my binary calculus has become somewhat rusty).

Make sense? And, reread the CISCO book...

Last edited by RudiC; 05-31-2016 at 03:20 PM..

RudiC

View Public Profile for RudiC

Find all posts by RudiC

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

assigning variables

Before I even attempt this, is it possible to grep for a pattern, maybe a partial sentence like "go to page 3", assign that to a variable and then use awk or something to pull out the 3 and assign it to a variable? So first I would have Gotopg = "go to page 3" then page = 3

2. Shell Programming and Scripting

Assigning Value of variable

Hi In my shell script, I'm trying to find the line count of a file and assign it to a variable. LINE_COUNT=$(wc -l $FILE_NAME) But when i display LINE_COUNT, i'm getting the linecount concatenated with the file name. I want only the number. How can i get the line count alone ? Someone...

3. HP-UX

Assigning IP's

hi all, i want to know where i can add and IP address so when i do a "w", i can see what IP is assigned to which tty? i know in tru64 you just added an entry to /etc/hosts. this does not seem to be the case with hpux. thanks

4. Shell Programming and Scripting

assigning a variable

hi all, in ksh, how do i assign the output of a find command to a variable, e.g am trying something like this : totalNoFiles=$(print find ./ -name "SystemOut*.log"); but when i echo $totalNoFiles it displays find ./ -name "SystemOut*.log" instead of the total number of...

5. Shell Programming and Scripting

Assigning value to a variable

can we make a global variable and store character values and add other values to that variable ?? for example a="hello, John" and can we add value ". How are you? so a can have "hello, John. How are you?" can someone help me??

6. Shell Programming and Scripting

print range between two patterns if it contains a pattern within the range

I want to print between the range two patterns if a particular pattern is present in between the two patterns. I am new to Unix. Any help would be greatly appreciated. e.g. Pattern1 Bombay Calcutta Delhi Pattern2 Pattern1 Patna Madras Gwalior Delhi Pattern2 Pattern1...

7. AIX

assigning ip to second nic

Hi admins i want to assign new ip adress to my aix 5.3 machine which is in LPAR ent3 Available Virtual I/O Ethernet Adapter (l-lan) ent0 Available 05-08 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902) ent1 Available 05-09 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902) ent2...

8. Shell Programming and Scripting

Assigning value to a variable

Unable to get the value to a variable. set -x cd $HOME echo "Enter the server name" read a echo $a i=4 j=1 k = ps -ef | awk '/server1/{ print $4 }' | tail -$i | head -$j` echo $k When I do the same in command line it works, however the same does not work when I provide that in the...

9. IP Networking

IP Range Assigning

Hi All, I'm a bit confused about assigning IP address from IP Ranges. I am using this scenario below to understand. Scenario Adatum.com an international IT solutions company, is launching 12 new branches in a new country where they currently have no existing branches. The sWin CIO has asked...

10. Shell Programming and Scripting

Grepping a timestamp range and assigning it to a constant

Hi, I couldn't find any thing on google about it and have been trying to figure this out but am not getting anywhere. I want to know if its possible through a script. I have a file with columns start time and end time separated by a comma, basically there are some other columns which I need to...

LEARN ABOUT DEBIAN

rlm_ippool_tool

RLM_IPPOOL_TOOL(8)					      System Manager's Manual						RLM_IPPOOL_TOOL(8)

NAME

       rlm_ippool_tool - dump the contents of the FreeRadius ippool database files

SYNOPSIS

       If an ipaddress is specified then that address is used to limit the actions or output.

       rlm_ippool_tool [-a] [-c] [-o] [-v] session-db index-db [ipaddress]

       Mark the entry nasIP/nasPort as having ipaddress

       rlm_ippool_tool -n session-db index-db ipaddress nasIP nasPort

       Update old format database to new.

       rlm_ippool_tool -u session-db new-session-db

DESCRIPTION

       rlm_ippool_tool dumps the contents of the FreeRADIUS ippool databases for analyses or for removal of active (stuck?) entries.

       Or with the -n argument adds a usage entry to the FreeRADIUS ippool databases.

OPTIONS

       -a     Print all active entries.

       -c     Report number of active entries.

       -r     Remove active entries.

       -v     Verbose report of all entries.

       -o     Assume old database format (nas/port pair, not md5 output).

       -n     Mark the entry nasIP/nasPort as having ipaddress.

       -u     Update old format database to new.

EXAMPLES

       Given the syntax in the FreeRadius radiusd.conf:

	       ippool myippool {
		   range-start = 192.168.1.0
		   range-stop = 192.168.1.255
		   [...]
		   session-db = ${raddbdir}/ip-pool.db
		   ip-index = ${raddbdir}/ip-index.db
	       }

       To see the number of active entries in this pool, use:

	       $ rlm_ippool_tool -c ip-pool.db ip-index.db
	       13

       To see all active entries in this pool, use:

	       $ rlm_ippool_tool -a ip-pool.db ip-index.db
	       192.168.1.5
	       192.168.1.82
	       192.168.1.244
	       192.168.1.57
	       192.168.1.120
	       192.168.1.27
	       [...]

       To see all information about the active entries in the use, use:

	       $ rlm_ippool_tool -av ip-pool.db ip-index.db
	       NAS:172.16.1.1 port:0x2e8 - ipaddr:192.168.1.5 active:1 cli:0 num:1
	       NAS:172.16.1.1 port:0x17c - ipaddr:192.168.1.82 active:1 cli:0 num:1
	       NAS:172.16.1.1 port:0x106 - ipaddr:192.168.1.244 active:1 cli:0 num:1
	       NAS:172.16.1.1 port:0x157 - ipaddr:192.168.1.57 active:1 cli:0 num:1
	       NAS:172.16.1.1 port:0x2d8 - ipaddr:192.168.1.120 active:1 cli:0 num:1
	       NAS:172.16.1.1 port:0x162 - ipaddr:192.168.1.27 active:1 cli:0 num:1
	       [...]

       To see only information of one entry, use:

	       $ rlm_ippool_tool -v ip-pool.db ip-index.db 192.168.1.1
	       NAS:172.16.1.1 port:0x90 - ipaddr:192.168.1.1 active:0 cli:0 num:0

       To add an IP address usage entry, use:

	       $ rlm_ippool_tool -n ip-pool.db ip-index.db 192.168.1.1 172.16.1.1 0x90
	       rlm_ippool_tool: Allocating ip to nas/port: 172.16.1.1/144
	       rlm_ippool_tool: num: 1
	       rlm_ippool_tool: Allocated ip 192.168.1.1 to client on nas 172.16.1.1,port 144

SEE ALSO

       radiusd(8)

AUTHORS

       Currently   part   of   the   FreeRADIUS   Project   (http://www.freeradius.org)   Originally   by   Edwin   Groothuis,	 edwin@mavetju.org
       (http://www.mavetju.org)

       Mailing list details are at http://www.freeradius.org/

																RLM_IPPOOL_TOOL(8)