Cisco Error Overlaps
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Overlapping Ip Address Problem
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This Ip Address And/or Subnet Mask Is Not Allowed For Use On A Port
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Interface Serial0/0/0
Tags Users Badges Unanswered Ask Question _ Network Engineering Stack Exchange is a question and answer site for network engineers. Join them; it only takes a minute: Sign up https://supportforums.cisco.com/discussion/10108346/overlapping-error-fast-ethernet-interface Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Overlapping serial interfaces? (Packet Tracer) [closed] up vote 1 down vote favorite Today I tried configuring some practice assignments at home, with packet tracer. But whenever I try to configure and activate the serial interfaces it http://networkengineering.stackexchange.com/questions/16221/overlapping-serial-interfaces-packet-tracer responds with "198.162.10.0 overlaps with Serial0/0/1" or Serial0/0/0. To make it easier to understand I will give the IP Addressing table: R1: FA0/1:- 160.24.65.1 - 255.255.255.0 S0/0/0: - 198.162.10.1 - 255.255.255.0 S0/0/1: - 198.162.10.9 - 255.255.255.0 R2: S0/0/0: - 198.162.10.2 - 255.255.255.0 S0/0/1: - 198.162.10.5 - 255.255.255.0 R3: FA0/1: - 160.24.65.65 - 255.255.255.0 S0/0/0: - 198.162.10.10 - 255.255.255.0 S0/0/1: - 198.162.10.6 - 255.255.255.0 What am I doing wrong? To the ones who answered, thank you for helping me, but it was not quite what I was after. You see I have to use the 198.162.10.0/24 network for serial links, and 160.24.65.0/24 for local networks. So switching masks might solve it but not within the "rules" of this. To further explain I will put the whole addressing table here: ![enter image description here][1] The topology for the addressing for those who are interested: ![enter image description here][2] Example of a working one with similar networks. ![enter image description here][3] cisco subnet share|improve this question edited Jan 19 '15 at 21:17 asked Jan 19 '15 at 10:42
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn http://superuser.com/questions/460220/im-using-cisco-packet-tracer-for-simulation-and-got-error-ip-address-overlaps more about Stack Overflow the company Business Learn more about hiring developers or posting http://www.techexams.net/forums/ccna-ccent/67074-why-do-these-overlap.html ads with us Super User Questions Tags Users Badges Unanswered Ask Question _ Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and ip address rise to the top I'm using Cisco Packet Tracer for Simulation and got error “ip address overlaps with..etc” up vote 4 down vote favorite The 1st row is for my router and the 2nd row is for my LAN. What's wrong? Is my IP addressing and subnetting wrong? I already checked my configuration. ip-address cisco subnet share|improve this question edited Aug 11 '12 at 6:03 user3463 asked Aug 10 overlaps with fastethernet0/0 '12 at 21:21 Augustine Frendz 2112 add a comment| 3 Answers 3 active oldest votes up vote 6 down vote Your addressing is indeed wrong :-( First entry is correct, but second is fundamentally wrong. Prefix and mask is ok, but network and range is not. You cannot have a network .4 with a prefix of 27. 27 prefix says - 27 most significant bits of address specifies network. Rest of 32 bits is filled with 0. So last octet must be: xxx00000. When you entered your second ip address, router calculated network address for it (cleared last 5 bits) to be 192.168.1.0, which is the same as your first network, hence 'overlapping' error. share|improve this answer edited Aug 11 '12 at 22:51 answered Aug 10 '12 at 23:07 wmz 4,3621621 thank you sir for the reply i'm still very new to this topic and for me it is just too hard to understand yet but i'm not giving up ;) so can you suggest me sites/resources that i can review about this topic, or the best practices for ip address of wan and lan! and i only derived that IPs with my own perception since for the 1st row thats for m
this Thread… lon21 Senior Member Join Date May 2011 Posts 201 Certifications Computer Science and Network Computing BSc, CCNA 06-12-201108:01 PM #1 Why do these overlap? I'm trying to do a lab in PT. and get the following error? LAB_A(config-if)#int se 0/0/0 LAB_A(config-if)#i LAB_A(config-if)#ip address 172.16.20.1 255.255.0.0 % 172.16.0.0 overlaps with FastEthernet0/0 LAB_A(config-if)#no shutdown % 172.16.0.0 overlaps with FastEthernet0/0 Serial0/0/0: incorrect IP address assignment LAB_A(config-if)#do show ip int b Interface IP-Address OK? Method Status Protocol FastEthernet0/0 172.16.10.1 YES manual up up FastEthernet0/1 unassigned YES unset administratively down down Serial0/0/0 172.16.20.1 YES manual administratively down down Vlan1 unassigned YES unset administratively down down LAB_A(config-if)# Quote Login/register to remove this advertisement. jwashington1981 Senior Member Join Date Dec 2008 Location Chesapeake, VA Posts 137 Certifications B.S. Network Security, CCNA, Security + 06-12-201108:16 PM #2 We need more information to be able to answer that. What's the mask associated with the ip address assigned to Fa 0/0? Quote mark076h Senior Member Join Date Nov 2006 Posts 153 06-12-201108:25 PM #3 Originally Posted by jwashington1981 We need more information to be able to answer that. What's the mask associated with the ip address assigned to Fa 0/0? I don't think so. He is trying trying to put the 172.16 network on both interfaces. Quote CodeBlox Lost a treasure Join Date Jun 2010 Posts 1,326 Certifications A+, Security+, CCNA 06-12-201108:31 PM #4 Your mask is "wrong". In order for this to work, you could use something like a /20 which is 255.255.240.0 A /24 would do too: 255.255.255.0 Currently reading: Network Warrior, Unix Network Programming by Richard Stevens Quote lon21 Senior Member Join Date May 2011 Posts 201 Certifications Computer Science and Network Computing BSc, CCNA 06-12-201108:32 PM #5 Originally Posted by jwashington1981 We need more information to be able to answer that. What's the mask associated with the ip address assigned to Fa 0/0? I have a Router (Lab A) Which connects to a pc via fa 0/0 with the ip address of 172.16.10.1 I also have a serial links which connects to a router which should have the ip of 172.16.20.1. Thanks Quote lon21 Senior Member Join Date May 2011 Posts 201 Certifications Computer Science and Network Computing BSc, CCNA 06-12-201108:35 PM #6 Originally Posted by CodeBlox Your mask is "wrong". In order for this to work, you could use something like a /20 which is 255.255.240.0 A /24 would do too: 255.255.255.0 OK this is new. I'm using a Class B address which