Getting Network Topology IP Addresses And Vlan's?
May 28, 2012
i create a network topology ( i attached picture) and i don't know what exactly IP addresses should be assigned to routers and switches + there should be five VLAN's created and just one vlan (vlan 2) must see others vlans (for management purposes) and others vlans should not see each other. So i need that: 1) What IP addresses should be on routers and switches 2) How to create a 5 vlans, that they should not see each other, but one should see all, for example where i have to put "tagged" ports where "untagged" or "not member" ports etc.
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May 28, 2012
i create a network topology ( i attached picture) and i don't know what exactly IP addresses should be assigned to routers and switches + there should be five VLAN's created and just one vlan (vlan 2) must see others vlans (for management purposes) and others vlans should not see each other. So i need that: 1) What IP addresses should be on routers and switches 2) How to create a 5 vlans, that they should not see each other, but one should see all, for example where i have to put "tagged" ports where "untagged" or "not member" ports etc.
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Dec 16, 2011
Had an odd issue that started up last few days.. Have a port on a cisco 2912 XL that keeps dropping (drops all packets) on a certain VLAN, but still passes others. Spanning-tree for that vlan says all ports are in forwarding status. VTP says that VLAN is still active.
This network is a little strange... 2924XL -> MotoPTP -> 2912XL -> Moto Canopy Array -> Some sites with cisco, some without all feed through canopy controller switch to single port (fa0/8) on 2912.
Getting a few of these on terminal monitoring, %RTD-1-ADDR_FLAP: FastEthernet0/8 relearning 5 addrs per min... Sometimes this is fa0/8, fa0/10, or fa0/1.
I'm thinking the switch has just gone nuts, cause fa0/1 is direct connected to a router used for VLAN1. fa0/8 is connected to a dumb switch on a canopy CMM as a trunk which i enabled bpdufilter on because of some spanning tree issues on VLAN1. fa0/10 is connected to canopy PTP back to the 2924 as a trunk. VLAN69s router is off the 2924. So there aren't really any possible alternate packet paths to this switch from another switch.
I also setup SPAN and captured all packets from fa0/8 and fa0/10 (seperately) and never seen packet storms of any kind on either VLAN1 or VLAN69.Further testing with debug, nothing on spanning tree, nothing on vtp, but on ethernet-controller addr I got some interesting results showing one mac moving from fa0/1 to fa0/8 and back to fa0/1 but it never moves, its the routers mac that is connected directly to fa0/1. Same with some macs on the other side of the PTP link saying they are bouncing from fa0/10 to fa0/8 and back to fa0/10 which isn't possible
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Feb 12, 2013
- Incoming frames on three of a blade's four switchports are being put into VLAN 1 even though the ports are either in other access VLANs, or are configured as trunks with different VLAN IDs being tagged by the server. - When the ports go down the access VLAN is removed from the port.
Switch stack: 4x WS-CBS3120X-S, 12.2(58)SE1
HP blade: HP BL460c Gen8
This combination has been used successfully elsewhere.
Switchport configuration:
!
interface GigabitEthernet1/0/13 -------> THIS PORT IS OK
switchport mode trunk
[Code].....
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Apr 27, 2012
how can i connect two offices in the same town.these two offices are separated by two kilometres.each office has ten rooms.how can i provide a secure intranet between the two offices ,what media can be used and hardware to provide a secure intranet via the two offices.
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Jun 21, 2012
Using Topology I can show device view from all my managed VTP domains. I don't understand why all links are "not in network"!?
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Oct 14, 2012
After some time LMS stops to refresh network topology (not changing colors for devices which lost/found). However, if I restart topology services devices are refreshed.
Checked the processes. Everything is fine but there is a process named "1018". But I did not found any job with this number.
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Mar 29, 2011
As we know when multiple PCs share same link"line" they will need multiple access protocol like CSMA/CD to protected from collision,,share link like "bus topology" need multiple access protocol "CSMA/CD" but in star topology"switch not hub" PC0 connect to port0 ,,PC1 connect to port1 PCn connect to portn then every PC connect to separate port ,, and the switch mange the network"by using MAC" then why we need to used CSMA/CD in star topology"switch"???
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Feb 18, 2012
I need to connect 4-6 laptops in a mesh network topology. What equipment do I need (switches, hubs cable etc..) and how should I create the connection?
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Jun 5, 2013
We currently support a third party VOIP software. Recently we have had issues with our T38 faxing to our SIP Trunk provider because our FW (sonicwall) doesn't support Nating the connection address within the SDP packet of the T.38 reinvite. This has caused us to look at alternate solutions. I have been in discussion with CISCO sales engineers and can't get a straight answer on which one of their products support this(RFC 3362, T.38 protocol used by our VOIP server)We were looking at replacing our sonicwall with an ASA but it seems it doesn't support RFC 3362 either . However, the sales engineer thinks that their regular routers will. So If I purchase a cisco router, i.e 8xx or 2621XM the question is where do I put it in my current topograpy. Currently we our at a Datacenter and our drop into our cabinet comes right into the Sonicwall and we have all NAT handled there, routing to different LAN ports on the Sonicwall. On LAN side all we have are standard switches supporting all of our Servers.
If I buy a Cisco router to handle my NAT issue for faxing.Do I put it on the WAN or LAN side of my FW?Do I setup the router to handle all of my NATing or just the NATing of my VOIP server that is having issues with the T.38? Would I need a Sonicwall FW if I purchased a CISCO 891?
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Apr 29, 2013
I have a problem where clients cannot roam between Cisco 1231g-e-k9 and recently installed cisco 1242g-e-k9 access points.. On looking at the CDP option on the 1231 and 1242 access points they are all aware of each other. However if I use the Network View option I see a different picture. All the 1231 access points can see each other but not see the 1242's. Network View on the1242 shows all the 1231's but none of the 1242's. The 1231 are running ver. 12.3(8)JEB and the 1242's are running ver. 12.4(21a)JA1.
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Nov 12, 2012
I am a beginner, and my customer complaining about the internet connection performance which is very slow, the network description is given below:
Description:
The building has four floors and each floor has one mount rack which contains one 26 port switch + 16 port switch. and each floor has 32 pc as well.
- 4, Cisco SR2024 un managed switches.
- 4, Cisco SR2016 un managed switches.
- 1, Cisco access point for internet connection.
- 1, Active directory server.
- 1, Mail Server.
- Internet ADSL connection, 1 MB speed.
This is the current topology.
*Note:The links and cable type "100BASE-TX under Cat 5" among all switches.
*Note:Whenever I connect to the main router "Access point" the internet becomes very fast.
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Oct 8, 2012
In setup for old RV042 (V1), when updating / adding Mac addresses, the table is always sorted by IP addresses. But in the new oneRV042 (V3) I have, even with latest firmware 4.2.1.02 the list is random, thereby increasing the chance of user entering DUPLICATE IP addr with diff Mac addr. That will result in conflict.If the firmware sorts the DHCP entries by ip addresses, user would be able to catch duplicate ip errors even if the system does not flag the errors. All Cisco smart engineers can you all get the dhcp entries SORT by ip addresses.
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Aug 20, 2012
I'm planning to setup a network with more than 300 PCs. I know that using class C address is not enough to allocate number of IP addresses required. What I meant in the preceding sentence is that If I use this network address 192.168.1.0 (class C), it will allow only 256-2 = 254 IP addresses, What about other PCs in the network ?
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Nov 15, 2012
I have various unknown Mac addresses on my network,detecting if they are normal/non harmful OR if I've been hacked! I've uploaded a picture of the addresses, the second to the last address is my router's.
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Mar 22, 2011
I have various unknown Mac addresses on my network, I need to detect if they are normal/non harmful OR if I've been hacked! I've uploaded a picture of the addresses, the second to the last address is my router's.
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Sep 18, 2011
I have 192.168.2.1 and 10.10.0.1But i cant connect to 10.10.0.1 network from 192.168.2.1 network. What should I do to connect that both are same network I have a Linksys Router.
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Dec 5, 2011
how do i assign IP addresses to 10 computers in a network?
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May 23, 2012
I have a home network with a Netgear N600 as my main router. I have a wirelesss HP printer that accesses fine as does Iphones and Ipad. Then I have hard wires. Off of the main router I have 3 Netgear 5 port switches. 1 switch with a line to bedroom tv and a line to family room tv. 1 Switch at family room TV which goes to Blu Ray, Direct Tv, and Xbox360. 1 switch at bedroom for Blu Ray and Direct TV. Believe it or not, this all worked. I tried to hook up a ZmodoH264 security system (the ones with four cameras, and a separate hard drive and monitor for viewing). I used one of the 4 inputs on the main Netgear router for this, and it seemed to be recognized. But, I can't access the security system mobilly, AND all my network addresses seem to have been screwed as Directv isn't working (Whole Home) and the printer stopped being recognized. However, Blu Rays are still fine. Is there a way with ipconfig to list all of my hard wired nodes? I assume wireless dont show up in a list.
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Jul 10, 2012
My church has a AT&T wired modem and a Netgear Wireless router. Pastors office is on other side of church and he is losing signal occassionally. His network is showing two SSID addressed cgcg cgcg2
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Mar 5, 2011
In my wireless table of who is connected to the wireless network there are 3 different mac addresses displaying when there is only two computers in the house(its not an outsider, it only shows when the other PC turns on), 2 of them have the same computer name but are connected at different IP addresses(192.168.1.101,192.168.1.102). Side Note:[The 2 PCs in the house were bought at the same time and the mac addresses are similar, but the third is different] Now that i have installed ubuntu i can really see what's going on with my ports, i notice that the mac address, that is not similar to my PC and the 'other pc', is poking around at my ports whenever the 'other PC' is turned on.
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Jan 19, 2013
I have used all the spots on the form to filter mac addresses. Is there some way to add more? I have a lot of friends that come over from time to time. I also have plenty of my own wireless devices.I like using the mac address filter so not using it is not an option. Hopefully there is a way to add more, instead of being limited to a predetermined amount.
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Nov 10, 2011
How can i use a router to extend the ip addresses of a separate network? I have been given a subnet mask of 255.255.255.248 which has given me 6 ip addresses to access the internet. How can i use a router to allocate extra ip addresses and route them to the internet ?
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Jan 10, 2012
How can I find out the ip addresses of contacts in social networks
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Nov 9, 2012
Is there any solution for automatic switching between wired and wireless network connection?
In my work we have two option for connection to network. Wired for working but with blocked pages like youtube and other streaming media. And wireless for visitors which haven't blocked any pages but I can't do my work on it. Can I by connected to both and some utility will doing switching between them? I want to use streaming and be connected to wired network which has blocked streaming.
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Feb 25, 2012
I can see what MAC addresses have a wireless session and I've used MAC Filtering to stop some MAC addresses from using the network at certain times, but they are still getting through to the internet. I don't know if they were to clone their MAC address as to whether this would show up with the cloned address in active sessions list. How I can stop some users from getting through at certain times? Any utility I can use on my Mac (Mac OS X 10.6. to show which computers/MAC addresses are on the network?
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Apr 21, 2011
My boss would like to know if there is a way to find out the ip address of a person VPN ing into our network. Let's say Joe Smith is VPNed in from home and his carrier is cox communications. How would I go about finding out what his ip address (the ip issued to him by cox) is? Is that even possible? If it is possible, is there a way to create a list of ip addresses of everyone that has ever VPN ed into our network? We are using a Cisco ASA 5520 and Cisco VPN Client.
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May 26, 2011
I have set up a private domain network at home. I have a domain controller, a DNS server, and a DHCP server all running on one Windows 2003 Server machine. I have about 10 other machines around the house, getting their IP addresses from this DHCP server.
I have a Netgear WNDR3700 router.
I am about to get 5 public IP addresses from my ISP, and I would like to make some of these machines publicly accessible (while still accessible from the other machines in the network).
I found this link that says on my web server (one of the public machines), that I should use a second NIC and set that up to connect to my router (and get a private IP address from my DHCP server).
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Sep 2, 2012
I am studying for my CCENT and have two Cisco switches and three Cisco routers. I have 'configured' the switches and routers but how to obtain valid IP addresses to assign to my devices and how I can connect these devices to the internet via my wireless home hub.
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Jun 16, 2012
I have a LAN with about 200 computers (192.168.10.0/24) with a DHCP Server on Windows server 2003.The problem is that my company have acquired 100 others computers that I have connected on this network.Some computer does not get IP address from the DHCP server. When I investigated the log of the DHCP server, I realized that the DHCP server was out of addresses.
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Aug 9, 2011
I have a Netgear ProSafe VPN Firewall FVX538. But I also have 10 Public IP Addresses that I will like to setup for three web services. So how do I set this up. With multiple routers. Or can my Netgear FVX538 take multiple Public IP Addresses to the same ports. If not how can setup multiple routers. one being the main one.
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Feb 16, 2013
I found my dir-601 router keeps making arp query to all ip addresses in same network periodically.all dhcp clients are general laptops and smart phone, I don't think there are any arp cheats attack on those devices.is it normal?
model: DIR-601
hardware version: B1
firmware version : 2.00NA
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Feb 2, 2012
the by-pass mechanism used to isolate the fault if any link fail.
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